Consulta: subjectFacets:"Grazing"
Registros recuperados: 129
Data/hora: 16/06/2024 21:07:49

Bloques multinutricionales con follaje de árboles como suplemento alimenticio de ovinos.
Provedor de dados: 32
Autores: Martínez Martínez, Ricardo.
Se evaluó la factibilidad técnica y financiera de incorporar follaje de árboles forrajeros en bloques multinutricionales (BMN) para suplementar ovinos en pastoreo. Se elaboraron bloques de 2.5 kg con follaje de Guazuma ulmifolia Lam., Leucaena lanceolata S. Watson, Acacia cochliacantha Humb. &amp; Bonpl. Willd y Brosimum alicastrum Swartz, que se ofrecieron como suplemento a ovinos pelibuey durante el pastoreo. Se evaluó el costo de la manufactura y las características físico-químicas de los BMN, así como la preferencia, el consumo y la ganancia de peso de los animales durante la suplementación. Los bloques alcanzaron 4 kg cm-2 de dureza a los 7 días de su elaboración y contenían en promedio 23.5 % PC, 25 % FDN, 17.5 % FAD y más de 63 % DIVMS, con costo de...
Palavras-chave: Bloques multinutricionales; Suplementación; Arboles forrajeros; Ovinos; Pastoreo; Feed block; Supplementation; Fodder trees; Sheep; Grazing; Maestría; Agroecosistemas Tropicales.
Ano: 2010
URL: http://hdl.handle.net/10521/212

Evaluación del tejido adiposo de toretes en pastoreo finalizados con ensilado de caña de azúcar (Saccharum officinarum L.)
Provedor de dados: 32
Autores: Caro Hernández, José Manuel.
Buscando alternativas de alimentación que permitan reducir la pigmentación  amarilla de la grasa en la canal del ganado bovino, se realizó un experimento con  toretes finalizados en pastoreo, en el cual se evaluó el efecto de suplementación con  ensilado de caña de azúcar (EC) en la digestibilidad, comportamiento productivo y  color de la grasa en la canal. Se utilizaron 40 toretes con encastes de Brahaman,  Suizo y Beefmaster (376 + 7.79 kg PV) mantenidos en pastoreo rotacional, en  praderas establecidas con pasto estrella de África (Cynododn plestostachyus) por 90  d. Los tratamientos (T) fueron T1= Sólo pastoreo, T2= T1 + EC, T3= T1 + EC + 15 g  de Fibrozyme®, T4= T1 + EC + 30 g de Fibrozyme®. La suplementación se realizo en  corraletas individuales...
Tipo: Tesis
Palavras-chave: Caña de azúcar; Ensilado; Carotenos; Colorimetría; Grasa amarilla; Toretes; Pastoreo; Enzimas fibroliticas; Maestría; Producción Agroalimentaria en el Trópico; Sugar cane; Silage; Carotene; Colorimetry; Yellow fat; Steers; Grazing; Fibrolitics enzyme.
Ano: 2007
URL: http://hdl.handle.net/10521/1433

Efecto de la pollinaza fermentada en estado sólido en el cambio de peso de toretes en pastoreo.
Provedor de dados: 32
Autores: May Arias, Germán.
Se realizo un ensayo de crecimiento con el objetivo de evaluar el efecto de la suplementación de la pollinaza fermentada (solida) en toretes en pastoreo, se utilizaron 32 toretes con un peso vivo (PV) promedio inicial de 234.3 ±.8 kg durante 107 días, distribuidos en dos tratamientos (T), tratamiento 1: Pastoreo + pollinaza fermentada y tratamiento 2: Pastoreo + pollinaza sin fermentar. Cada tratamiento tenía 4 corrales (repeticiones) con 4 animales por corral, se consideró al corral como una unidad experimental. El tratamiento (12 kg del suplemento base húmedo) se le suministró diariamente en el corral de 7:00 a 9:00, posteriormente, todos los animales salían a pastorear a la misma pradera. Los animales se pesaron cada mes durante tres días consecutivos....
Palavras-chave: Bovino; Suplementación; Pollinaza fermentada; Pastoreo; Trópico; Bulls; Supplementation; Chicken litter fermented; Grazing; Producción Agroalimentaria en el Trópico; Maestría; Cattle.
Ano: 2011
URL: http://hdl.handle.net/10521/606

Bloques multinutricionales con follaje de árboles como suplemento alimenticio de ovinos.
Provedor de dados: 32
Autores: Martínez Martínez, Ricardo.
Se evaluó la factibilidad técnica y financiera de incorporar follaje de árboles forrajeros en bloques multinutricionales (BMN) para suplementar ovinos en pastoreo. Se elaboraron bloques de 2.5 kg con follaje de Guazuma ulmifolia Lam., Leucaena lanceolata S. Watson, Acacia cochliacantha Humb. &amp; Bonpl. Willd y Brosimum alicastrum Swartz, que se ofrecieron como suplemento a ovinos pelibuey durante el pastoreo. Se evaluó el costo de la manufactura y las características físico-químicas de los BMN, así como la preferencia, el consumo y la ganancia de peso de los animales durante la suplementación. Los bloques alcanzaron 4 kg cm-2 de dureza a los 7 días de su elaboración y contenían en promedio 23.5 % PC, 25 % FDN, 17.5 % FAD y más de 63 % DIVMS, con costo de...
Palavras-chave: Bloques multinutricionales; Suplementación; Arboles forrajeros; Ovinos; Pastoreo; Feed block; Supplementation; Fodder trees; Sheep; Grazing; Maestría; Agroecosistemas Tropicales.
Ano: 2010
URL: http://hdl.handle.net/10521/212

Pastoreo con enfoque holístico: efecto sobre la fertilidad química edáfica, vegetación nativa y respuesta productiva de una manada mixta en un bosque de encino.
Provedor de dados: 32
Autores: Monroy Romero, Alberto.
El sobre pastoreo causa la compactación del suelo y pérdida de la vegetación y cuando es insuficiente la biomasa vegetal, se suele invadir bosques o selvas en búsqueda de alimento para el ganado lo que deteriora los ecosistemas. Como una alternativa surge el pastoreo con enfoque holístico (PH) en el que se favorece la productividad animal sin afectar el entorno. Por ello, en el presente estudio se evaluó de febrero-2008 a enero-2009 el PH en bosque de encino con una manada mixta de equinos, bovinos, ovinos, caprinos y porcinos y su efecto sobre la fertilidad química edáfica, la vegetación nativa y la productividad del ganado. Se colectaron muestras de suelo (99 en PH y 102 sin pastoreo) a 0-5 cm, 5-10 cm y 10-20 cm de profundidad y &lt;5%, 5-15%, 15-30% y...
Palavras-chave: Pastoreo; Holístico; Manada mixta; Bosque; Grazing; Holistic; Mixed herd; Forest; Edafología; Doctorado.
Ano: 2011
URL: http://hdl.handle.net/10521/627

Economic Behavior in the Face of Resource Variability and Uncertainty
Provedor de dados: 7
Autores: McAllister, Ryan R J; CSIRO Ecosystem Sciences; ryan.mcallister@csiro.au; Tisdell, John G; University of Tasmania; John.Tisdell@utas.edu.au; Reeson, Andrew F; CSIRO Ecosystem Sciences; andrew.reeson@csiro.au; Gordon, Iain J; CSIRO Ecosystem Sciences; The James Hutton Institute (Current Address); iain.gordon@csiro.au.
Policy design is largely informed by the traditional economic viewpoint that humans behave rationally in the pursuit of their own economic welfare, with little consideration of other regarding behavior or reciprocal altruism. New paradigms of economic behavior theory are emerging that build an empirical basis for understanding how humans respond to specific contexts. Our interest is in the role of human relationships in managing natural resources (forage and livestock) in semiarid systems, where spatial and temporal variability and uncertainty in resource availability are fundamental system drivers. In this paper we present the results of an economic experiment designed to explore how reciprocity interacts with variability and uncertainty. This behavior...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agistment; Experimental economics; Grazing; Investment game; Livestock mobility; Nomadism; Reciprocity; Trust game.
Ano: 2011

Valuing the Provisioning Services of Wetlands: Contrasting a Rural Wetland in Lesotho with a Peri-Urban Wetland in South Africa
Provedor de dados: 7
Autores: Lannas, Kathryn S. M.; Percy FitzPatrick Institute, University of Cape Town; ktlannas@gmail.com; Turpie, Jane K; Percy FitzPatrick Institute, University of Cape Town; jane.turpie@uct.ac.za.
Given that few studies have valued the provisioning services of temperate southern African wetlands, research on this topic was undertaken in a remote rural wetland, Letseng-la-Letsie, in Lesotho and a peri-urban wetland in Mfuleni, Cape Town. The objectives were to quantify incomes from wetland resources, assess the relative dependency of communities on wetland provisioning services, and estimate the total provisioning value of the wetlands. Data were collected from informal interviews and structured household surveys. Despite the different settings, both wetlands were used mainly for grazing livestock. The estimated total value added during 2007 from grazing was U.S. $180,078 for Letseng-la-Letsie and U.S. $540,286 for Mfuleni. Letseng-la-Letsie and...
Tipo: Peer-Reviewed Reports
Palavras-chave: Wetlands; Provisioning services; Dependency; Livelihoods; Grazing; Lesotho; South Africa; Peri-urban areas.
Ano: 2009

Ecosystem Services, Land-Cover Change, and Stakeholders: Finding a Sustainable Foothold for a Semiarid Biodiversity Hotspot
Provedor de dados: 7
Autores: Reyers, Belinda; Natural Resources and the Environment, Council for Scientific and Industrial Research; breyers@csir.co.za; Cowling, Richard M.; Department of Botany, Nelson Mandela Metropolitan University;; Egoh, Benis N.; Centre for Invasion Biology, Department of Botany and Zoology, Stellenbosch University;; Le Maitre, David C.; Natural Resources and the Environment, Council for Scientific and Industrial Research;; Vlok, Jan H. J.; Regalis Environmental Services;.
Land-cover change has been identified as one of the most important drivers of change in ecosystems and their services. However, information on the consequences of land cover change for ecosystem services and human well-being at local scales is largely absent. Where information does exist, the traditional methods used to collate and communicate this information represent a significant obstacle to sustainable ecosystem management. Embedding science in a social process and solving problems together with stakeholders are necessary elements in ensuring that new knowledge results in desired actions, behavior changes, and decisions. We have attempted to address this identified information gap, as well as the way information is gathered, by quantifying the...
Tipo: Peer-Reviewed Reports
Palavras-chave: Carbon; Grazing; Human well-being; Land degradation; Ostriches; Tourism; Trade-offs; Water.
Ano: 2009

Kenyan pastoralist societies in transition: varying perceptions of the value of ecosystem services
Provedor de dados: 7
Autores: Kaye-Zwiebel, Eva; Resource Development Associates; evainkenya@gmail.com; King, Elizabeth; Odum School of Ecology and Warnell School of Forestry &amp; Natural Resources, University of Georgia; egking@uga.edu.
In the drylands of northern Kenya, as elsewhere in Africa, traditional pastoralist social-ecological systems are undergoing profound transformations. Diminishing resource availability, changing social values and governance systems, and new resource management institutions challenge the capacity of communities for effective common pool resource management.  Individuals&amp;#8217; values and environmental perceptions play a substantial role in decision making regarding resource use and management. Additionally, social capital within communities can influence cooperative and adaptive resource management. We studied five Laikipia Maasai communities in Kenya, which share a common natural environment, history, and political organization.  We surveyed...
Tipo: Peer-Reviewed Reports
Palavras-chave: Common pool resources; Conservation; Grazing; Pastoralism; Social capital.
Ano: 2014

THE ALPINE LIFE ZONE UNDER GLOBAL CHANGE
Provedor de dados: 73
Autores: Körner,Christian.
Nearly forty percent of mankind depend in one way or another on mountain ecosystems. Local ecosystem services are slope stability, water yield, agricultural products or recreational value. Continental scale influences include drinking water supply, ground water recharging, irrigation water, hydroelectric power, flood control, traffic routes etc. In this paper I review evidence of alpine ecosystem responses to global change. It is emphasized that soil conservation is the centerpiece of any consideration of sustainable land use in alpine terrain. Complete vegetation cover of high biological diversity is essential to protect soils and secure `ecosystem services' in upland systems. It is illustrated that this is not necessarily in conflict with land use and...
Tipo: Journal article
Palavras-chave: Altitude; Biodiversity; Climate; Conservation; Grazing; High elevation; Land use; Mountain.
Ano: 2000
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432000000100001

Sistema integrado leucena, milho e feijão para pequenas propriedades da região Semi-Árida.
Provedor de dados: 14
Autores: CARVALHO FILHO, O. M. de; BARRETO, A. C.; LANGUIDEY, P. H.
Escolha da área e preparo do solo; Cultivares e plantio; Tratos culturais; Colheita; Corte e incorporação da leucena; corte e ensilagem da leucena; Corte e fenação da leucena; Pastejo direto da leucena; Produtividade; Resultados econômicos.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Leucena; Consorciação; Sistema integrado; Pequena propriedade; Região semi-árida; Maize; Integrated systems; Pasture.; Produção animal; Pastagem; Ensilagem; Feno; Feijão; Incorporação; Leucaena Leucocephala; Milho; Pastejo; Produtividade; Zea Mays.; Animal production; Agriculture; Beans; Hay; Grazing; Intercropping; Small farms; Silage; Yields.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133954

Validação da bioacústica como alternativa à avaliação visual para monitoramento do comportamento ingestivo de bovinos em pastagens.
Provedor de dados: 14
Autores: VOLPI, D.; ALVES, F. V.; SARAIVA, E. F.; VIGAS, V. P.; ARGUELHO, A. da S.; ZOPOLLATTO, M.; ALMEIDA, R. G. de.
A observação visual do comportamento ingestivo em ruminantes, principalmente naqueles mantidos em pastagens, apesar de comumente utilizada com diferentes finalidades de estudo, é trabalhosa, pouca precisa e empenha grande quantidade de mão-de-obra. Com o avanço da tecnologia em geral, outras metodologias, que fazem uso de sensores mecânicos, ópticos e sonoros, mostram grande potencial de uso em ruminantes. A bioacústica, em particular, adequa-se em experimentos que necessitam tanto de macro quanto de microatividades, otimizando mão-de-obra e com custo relativamente baixo em comparação à outras metodologias automatizadas. Entretanto, por ser um campo de estudo recente na produção animal, as operações de captura e análise dos sons ainda precisam ser...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Acústica; Pecuária de precisão; Som; Feeding; Well-being; Precision livestock; Comportamento Animal; Gado Nelore; Nutrição Animal; Pastejo; Pecuária; Ruminante; Alimentação; Bem-Estar; Acoustics; Animal well-being; Grazing; Ruminants; Sounds.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1102352

Matéria orgânica do solo e relação C/N de solos manejados com diferentes sistemas de produção de grãos e pastagem em Dourados, MS.
Provedor de dados: 14
Autores: MELO, T. S.; SANTOS, P. S. dos; SOUZA, V. B. de; TOMAZI, M.
bitstream/item/148542/1/26-materia-organica.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Qualidade do solo; Preparo do solo; Soil preparation.; Carbono; Pastagem.; Grazing; Carbon; Soil quality.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1054322

Pastoreio de aveia e compactação do solo.
Provedor de dados: 14
Autores: SALTON, J. C.; FABRÍCIO, A. C.; MACHADO, L. A. Z.; OLIVEIRA, H. de.
bitstream/item/65976/1/CPAO-COM.-TEC.-48-01.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Pastoreio; Brasil; Mato Grosso do Sul; Dourados; Pasture; Soil compactation.; Aveia; Compactação do Solo; Cerrado; Pastagem.; Brazil; Grazing; Oats.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/244473

Uso de animais na avaliação de forrageiras.
Provedor de dados: 14
Autores: EUCLIDES, V. P. B.; EUCLIDES FILHO, K.
A avaliação de forrageiras com animais sob sistema de pastejo se constitui em uma área de extrema importância para a bovinocultura de corte em todo o mundo, e em especial nos paises tropicais e subtropicais como o Brasil, que tem como característica e como vantagem econômica a produção de carne bovina fundamentada em pastagens. No entanto, para que os resultados deste tipo de avaliação sejam de utilidade pratica e se transformem em incrementos de produtividade e de eficiência bioeconômica do sistema de produção, faz-se necessário que esta seja conduzida,considerando-se a existência de dois sistemas bem definidos, quais sejam, pastagem e animal. E importante ainda, alem do entendimento dos inter-relacionamentos destes dois sistemas, conhecer as relações em...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Bovino de corte; Avaliação; Forage plants; Evaluation; Methods.; Método de Pesquisa; Pastagem; Pastejo; Planta Forrageira.; Grazing; Beef cattle; Pastures; Research.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/318251

Método para estimar o tamponamento nutricional para vacas de corte em sistemas pastoris.
Provedor de dados: 14
Autores: BARIONI, L. G.; MARTHA JÚNIOR, G. B.
Planning forage needs in beef cattle enterprises is necessary for efficient utilization of genetic and environmental resources in pastoral systems and to generate economic benefits in an environmentally sound way. Production risk evaluation is essential in feed planning for cow-calf operations in pastoral systems. The proposed method to accomplish with production risk in these systems is based on the time biological system is maintained in an acceptable state under adverse climate conditions. This is coined "buffering time". The buffering time is calculated for both animals and pasture using an energetic approach. For cows, the buffering time is the minimum period the animal takes to reach the lowest acceptable body weight. for pasture, it is period for...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Bovinae.; Bovino; Gado de Corte; Modelo Matemático; Pastejo; Nutrição Animal; Planejamento; Risco.; Animal production; Beef cattle; Grazing; Planning; Mathematical models; Risk.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569498

Produção de ovinos e caprinos de corte em pastos cultivados sob manejo rotacionado.
Provedor de dados: 14
Autores: CAVALCANTE, A. C. R.; NIEVA, J. N. M.; CÂNDIDO, M. J. D.; VIEIRA, L. da.
O objetivo dessa publicação é expor os principais fundamentos da prática do manejo rotativo de pastagens como ferramenta para a produção de caprinos e ovinos de corte.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Caprino de corte; Ovino de corte; Manejo de pastagem; Grassland Management.; Produção animal; Pastejo Rotativo.; Grazing; Sheep; Goats.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/534488

BRS Mandobi amendoim forrageiro: leguminosa forrageira para intensificação sustentável da pecuária a pasto.
Provedor de dados: 14
BRS Mandobi é uma cultivar de amendoim forrageiro (Arachis pintoi) propagada por sementes. É uma leguminosa forrageira herbácea, perene e estolonífera. Possui de 20 cm a 35 cm de altura, apresenta excelente capacidade de consorciação com gramíneas, elevado vigor e alta produtividade de matéria seca. É bem consumida pelo gado, melhorando a qualidade da dieta animal, devido ao seu elevado teor de proteína e alta digestibilidade. É indicada tanto para formação de pastos novos em consórcio com gramíneas, quanto para plantio em pastos já estabelecidos. A taxa de semeadura recomendada é de 12 kg de sementes puras viáveis por hectare; em pastos já estabelecidos, recomenda-se o plantio em faixas.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Amendoim forrageiro; Forage peanut; Cacahuetes forrajeros; Nutrición animal; Prácticas de cultivo vegetal; Pastagem; Leguminosa Forrageira; Nutrição Animal; Pratica Cultural; Grazing; Forage legumes; Animal nutrition; Plant cultural practices.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1115762

Utilização do carrapicho (Cenchrus echinatus) de pomares para alimentação de ovinos.
Provedor de dados: 14
Autores: ALMEIDA, G. F. de; OLIVEIRA, M. C. de.
Uso de animais principalmente ovinos para controle de invasora Cenchrus echinatus - capim carrapicho atraves de pastejo. Aborda o manejo do rebanho, e a composicao proteica do carrapicho.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Uso; Pasture.; Pastagem; Alimentação; Capim Carrapicho; Cenchrus Echinatus; Ovino.; Grazing; Sheep.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131443

Nutritional value of forage peanut (Arachis Pintoi cv. BRS Mandobi) and elephant grass silages.
Provedor de dados: 14
Autores: CAVALI, J.; COUTO, V. R. M.; PORTO, M. O.; SALES, M. F. L.; VALENTIM, J. F.; VALENTE, E. E.; OLIVEIRA, I. M.; FERREIRA, E.; CARVALHO, G. G. P. de; CODOGNOTO, L. C.
Arachis pintoi, commonly known as forage peanut, is a leguminous plant with good forage yield and nutritional quality adapted to the Brazilian environmental conditions and used in grass/legume pastures or preserved as silage or hay. In this study, we evaluated the nutritional value and dry matter losses of silages produced with different proportions of forage peanutcv. BRS Mandobi and elephant grass. Five levels of substitution of elephant grass (0, 25, 50, 75, and 100%, fresh matter basis) for the legume were tested in a completely randomized design with four replicates. The fiber components of the silages, except lignin, decreased with higher levels of forage peanut. Crude protein content and in vitro dry matter digestibility presented maximum values of...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Amendoim forrageiro; Forage peanut; Cacahuetes forrajeros; Pastizales; Estatus nutricional.; Arachis pintoi cv BRS Mandobi; Pastagem; Valor Nutritivo; Leguminosa Forrageira; Gramínea Forrageira; Capim Elefante; Pennisetum Purpureum.; Nutritional status.; Grazing; Forage legumes; Forage grasses.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1108584

Limitações e potencial de Brachiaria humidicola para o trópico úmido brasileiro.
Provedor de dados: 14
Autores: DIAS FILHO, M. B.
bitstream/item/40588/1/Documentos-20-CPATU.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Capim-quicuio; Trópico Úmido; Brasil; Grass; Dry matter; Pest; Disease; Seed; Production.; Brachiaria Humidicola; Botânica; Doença; Gramínea; Matéria Seca; Nutrição; Pastejo; Praga; Semente; Produção; Valor Nutritivo.; Amazonia; Botany; Grazing; Nutritive value.; Nutrition.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383249

Variabilidade na determinação da qualidade da dieta de bubalinos em pastagem de Brachiaria humidicola.
Provedor de dados: 14
Autores: CAMARÃO, A. P.; OLIVEIRA, R. P. de; DUTRA, S.
bitstream/item/41645/1/Boletim-Pesquisa-130-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Bubalino; Buffalo; Pasture; Forage crop.; Brachiaria Humidicola; Dieta; Digestibilidade; Pastagem; Pastejo; Nutrição; Planta Forrageira; Valor Nutritivo.; Digestibility; Grazing; Diet; Nutritive value.; Nutrition.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381275

Sistema de produção de leite para o Semi-Árido.
Provedor de dados: 14
Autores: Embrapa Semi-Arido.
Características e fundamentos; Infra-estrutura agrossilvopastoril; Sistema de alimentação.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Nordeste; Regiao semi-arida; Pasture; Production; Cost.; Produçao animal; Custo; Leite; Pastagem; Pastejo; Produção; Sistema de Produção.; Animal production; Grazing; Farming systems; Milk.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131941

[Resumos dos trabalhos...].
Provedor de dados: 14
Autores: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 15., 2019, Campo Grande, MS.
bitstream/item/198895/1/15-Jornada-cientifica-Embrapa-Gado-Corte.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Gado de Corte; Melhoramento Genético Animal; Nutrição Animal; Pastagem; Produção Animal; Sanidade Animal; Cattle; Genetic improvement; Animal nutrition; Grazing; Animal production; Animal health.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1110154

Terminação de borregos em caatinga enriquecida com gramíneas no início da época seca.
Provedor de dados: 14
Autores: SILVA, N. L. da; ARAUJO FILHO, J. A. de.
bitstream/CNPC-2010/23038/1/cot106.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Enriquecimento da Caatinga; Raleamento da caatinga; Sertão; Brasil; Ceará; Thinning.; Ovino; Pastagem; Produção animal; Pastejo; Terminação; Raleio; Sheep; Animal production; Grazing; Brazil; Semiarid zones.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/748031

Utilizacao integrada de pastagens de Andropogon gayanus cv. Planaltina e Brachiaria brizantha cv. Marandu.
Provedor de dados: 14
Autores: LEITE, G. G.; ZOBY, J. L. F.
bitstream/item/99475/1/comtec-06.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Cultivar Planaltina; Cultivar Marandu; Bovinae; Desempenho animal; Feed grasses; Live weight gain; Pasture utilization; Utilização de pastagens.; Brachiaria Brizantha; Andropogon Gayanus; Bovino; Capim Brachiaria; Capim Andropogon; Cerrado; Ganho de Peso; Gramínea Forrageira; Pastagem; Pastejo.; Animal performance; Grazing; Pastures; Varieties.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546188

Suplementação de bovinos em pastejo.
Provedor de dados: 14
Autores: THIAGO, L. R. L. de S.; SILVA, J. M. da.
Bovinos em pastejo convivem com flutuações sazonais continuas, tanto na oferta como na qualidade das pastagens. Isso altera a curva de crescimento de animais em regime exclusivo de pasto, refletindo em abate com idade acima dos três anos. Tal desempenho natural dos sistemas de produção de carne atendia as necessidades de mercados passados. Hoje a demanda e por animais mais jovens, que estejam aptos para o abate com idade inferior aos três anos e carcaças com peso mínimo de 225 quilos e 3 milímetros de espessura de gordura. O objetivo deste trabalho e apresentar alternativas de suplementação para corrigir as deficiências nutricionais das pastagens, visando sistemas mais precoces de produção de carne.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Bovino de corte; Suplementação em pasto; Supplements; Mineral nutrients.; Chuva; Pastejo; Nutrição Animal; Seca; Suplemento Mineral.; Animal nutrition; Grazing; Beef cattle; Dry season; Wet season.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/325191

Suplementação alimentar em sindi lactantes.
Provedor de dados: 14
Autores: NASCIMENTO, C. N. B. do; LOURENÇO JUNIOR, J. de B.; TEIXEIRA NETO, J. F.; SALIMOS, E. P.
bitstream/item/33520/1/CPATU-CirTec11.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Bovino de leite; Sindi; Capim quicuio-da-amazônia; Suplementação; Teor; Campo Experimental de Tracuateua; Pará; Brasil; Production; Supplementation; Feed; Economy; Fat.; Alimentação; Economia; Gordura; Nutrição; Pastejo.; Amazonia; Grazing; Dairy cattle; Nutrition.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378407

Preferencia alimentar e uso do habitat do cavalo pantaneiro na Nhecolandia, Pantanal.
Provedor de dados: 14
Autores: SANTOS, S. A.; SILVA, M. P. da; MAURO, R. de A.
Entre os herbivoros que habitam o Pantanal, destaca-se o cavalo Pantaneiro, importante para o desempenho das atividades agropecuarias da regiao. A maioria dos pecuaristas mantem os cavalos juntamente com os bovinos, onde as pastagens nativas constituem a base alimentar da regiao. Este estudo foi conduzido no periodo de marco de 1990 a fevereiro de 1991, na fazenda Nhumirim da EMBRAPA-CPAP, Pantanal da Nhecolandia, para identificar a preferencia alimentar, uso do habitat, disponibilidade e composicao quimica das forrageiras consumidas pelo cavalo Pantaneiro, em diferentes epocas do ano. Na epoca da cheia (out./marco), de 31 forrageiras, as mais consumidas em importancia de ocorrencia foram Reimarochloa brasiliensis (28,3%), Axonopis purpusii (14,7%),...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Cavalo pantaneiro; Horse.; Dieta; Pastagem.; Nutrição; Pantanal; Grazing; Diet; Nutrition.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/787743

Selection of Panicum maximum hybrids in Brazil.
Provedor de dados: 14
Autores: JANK, L.; SANTOS, M. F.; NONATO, T. B.; SANTANA, T. S.; BARRIOS, S. C. L.; RESENDE, R. M. S.; VALLE, C. B. do.
In search of new cultivars with differentials that better meet the needs of the cattle ranchers, crosses between five sexual plants and the apomictic accessions PM20, PM21 and Myiage were carried out at Embrapa Beef Cattle, Campo Grande, MS, Brazil. Accessions PM20 and PM21 were used to generate shorter hybrids for use under grazing and for crop-livestock integration; Myiage was used because of its ability to retain seeds.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Progenitors; Nutritive value; Hybrids; Cultivars; Cattle; Grazing.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1120358

Produção de leite de búfalas em pastagem cultivada de terra inundável com suplementação protéica e energética.
Provedor de dados: 14
Autores: NASCIMENTO, C. N. B. do; CARVALHO, L. O. D. de M.; SIMÃO NETO, M.; DUTRA, S.
bitstream/item/42257/1/Boletim-Pesquisa-143-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Bubalino de leite; Suplementacao; Terra inundavel; Dairy buffalo; Production; Feed; Supplementation; Cultivated pasture; Floodable area.; Alimentação; Pastagem Cultivada; Pastejo; Nutrição; Produção.; Grazing; Milk; Nutrition.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378463

Ganho de peso de bubalinos sob três taxas de lotação em pastagem cultivada na ilha de Marajó.
Provedor de dados: 14
Autores: LOURENÇO JUNIOR, J. de B.; CAMARAO, A. P.; RODRIGUES FILHO, J. A.; COSTA, N. A. da; SIMAO NETO, M.; TEIXEIRA NETO, J. F.; BATISTA, H. A. M.; HANTANI, A. K.
bitstream/item/32694/1/CPATU-BP139.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Bubalino; Ilha de Marajó; Pará; Brasil; Buffalo; Management; Fattening; Feed.; Alimentação; Engorda; Forragem; Ganho de Peso; Nutrição; Pastejo; Valor Nutritivo.; Taxa de Lotação; Amazonia; Forage; Grazing; Nutritive value; Nutrition; Stocking rate; Weight gain.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378451

CULTIVO e uso do Estilosantes-campo-grande.
Provedor de dados: 14
Autores: Embrapa Gado de Corte (Campo Grande, MS).
Equipe multidisciplinar: Ademir Hugo Zimmer, CNPGC; Armindo Neivo Kichel, CNPGC; Bela Grof; Carlos Maurício Soares de Andrade; Celso Dornelas Fernandes, CNPGC; Francisco Assis Rolim Pereira; Haroldo Pires Queiroz, CNPGC; Hortência Maria Abranches Purcino; Jaqueline Rosemeire Verzignassi, CNPGC; José Alexandre Agiova da Costa, CNPGC; José Marcelino Sobrinho (in memorian); José Marques da Silva, CNPGC; José Raul Valério, CNPGC; Leônidas da Costa Schalcher Valle; Manuel Cláudio Motta Macedo, CNPGC; Maria José D´Ávila Charchar; Maria do Socorro Bona Nascimento; Marta Pereira da Silva; Rosângela Maria Simeão Resende; Roza Maria Shunke. Histórico e descrição da cultivar. Principais atributos do estilosantes-campo-grande. Fixação biológica de nitrogênio e valor...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Estilosantes; Desempenho animal; Consorciação; Campo Grande; Mato Grosso do Sul; Brasil; Management; Feed crops; Sustainability; Mixed pastures; Pests of plants; Plant diseases.; Desenvolvimento Sustentável; Doença de Planta; Erva Daninha; Fixação de Nitrogênio; Historia; Leguminosae; Leguminosa Forrageira; Manejo; Pastejo; Pastagem; Nutrição Animal; Planta Forrageira; Praga de Planta; Produção Animal; Sistema de Cultivo; Valor Nutritivo.; Animal performance; Animal nutrition; Stylosanthes; Animal production; Brazil; Cropping systems; Grazing; History; Nutritive value; Pastures; Nitrogen fixation; Weeds.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/319150

Levantamento populacional das cigarrinhas das pastagens em pastos de Brachiaria humidicola e Brachiaria ruziziensis sob diferentes intensidades de pastejo.
Provedor de dados: 14
Autores: VALERIO, J. R.; KOLLER, W. W.
bitstream/item/102316/1/digitalizar0014.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Spittlebugs.; Brachiaria Humidicola; Brachiaria Ruziziensis; Cigarrinha das Pastagens; Deois Flavopicta; Entomologia; Pastejo; População; Zulia Entreriana.; Grazing; Entomology; Population structure.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/321481

Desempenho de animais em aveia sob pastejo continuo.
Provedor de dados: 14
Autores: COSER, A. C.; CARVALHO, L. de A.; GARDNER, A. L.
bitstream/item/90979/1/CT-10-Desemp-animais-aveia.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Plantas forrageiras; Fertilizacao; Bovino de leite; Management; Winter forage plants; Fertilization.; Alimentação; Aveia; Avena Sativa; Irrigação; Inverno; Manejo; Pastejo.; Grazing; Dairy cattle; Irrigation; Nutrition.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/582390

Avaliação de cinco gramíneas tropicais em solo de cerrado, sob condições de pastejo.
Provedor de dados: 14
Autores: NUNES, S. G.; VIEIRA, J. M.; SOUZA, J. M. de.
Este trabalho foi desenvolvido e teve como objetivo investigar o comportamento de diferentes gramíneas forrageiras, implantadas em solos de cerrado, através do desempenho de novilhos.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Avaliação; Capim Kazungula; Condição; Evaluation; Forrageira; Gramineas; Gramíneas tropicais; Pasture; Plantas gramíneas forrageiras-Avaliação-Cerrados; Regiao tropical; Savanna; Tropical grassland.; Bovino; Brachiaria Decumbens; Cerrado; Capim Jaraguá; Capim Colonião; Capim Pangola; Digitaria Decumbens; Hyparrhenia Rufa; Gramínea; Gramínea Tropical; Melhoramento; Pastagem; Nutrição Animal; Panicum Maximum; Pastejo; Setaria Anceps; Produção; Solo.; Grazing; Forage; Grasses; Soil.
Ano: 1979
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1036161

Sistemas de producao animal em pastejo: um enfoque de negocio.
Provedor de dados: 14
Autores: MARTHA JUNIOR, G. B.; BARIONI, L. G.; CEZAR, I. M.; VILELA, L.
bitstream/CPAC-2009/24724/1/doc_63.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Gerenciamento; Gerencia; Management.; Análise Econômica; Desenvolvimento Rural; Manejo; Pastejo; Pecuária; Planejamento; Produção Animal; Tomada de Decisão.; Agribusiness; Animal production; Grazing; Decision making; Economic analysis; Planning; Rural development.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567759

Reações fisiológicas em diferentes grupos genéticos de bovinos de corte sob pastejo.
Provedor de dados: 14
Autores: ENCARNAÇÃO, R. de O.; SILVA, L. O. C. da; CORREA, E. S.; NOBRE, P. R. C.
bitstream/item/137544/1/PESQ-EM-ANDAMENTO-22.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Nelore; Ibage; Charoles; Fleckvieh; Adaptação; Charolois; Adaptation.; Bovino; Cruzamento.; Chianina; Nellore; Cattle; Grazing; Physiology.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/318094

Fósforo, leguminosas, quicuio da Amazônia e manejo no melhoramento de pastejo de capim colonião (Panicum maximum) em São João do Araguaia, Pará.
Provedor de dados: 14
Autores: CAMARÃO, A. P.; AZEVEDO, G. P. C. de; SERRÃO, E. A. de S.
bitstream/item/59806/1/CPATU-PA28.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Manejo de pastagem; Grassland management.; Capim Colonião; Ganho de Peso; Pastejo.; Nutrição Animal; Panicum Maximum; Animal nutrition; Grazing; Weight gain.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378285

Engorda de machos bubalinos da raça Mediterrâneo em pastagem de quicuio da amazônia (Brachiaria humidicola) na terra firme.
Provedor de dados: 14
Autores: CARVALHO, L. O. D. de M.; NASCIMENTO, C. N. B. do; COSTA, N. A. da; LOURENÇO JUNIOR, J. de B.
bitstream/item/33780/1/CPATU-CirTec25.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Bubalino; Mediterraneo; Quicuio-da-amazonia; Terra firme; Brasil; Buffalo; Feed; Fattening; Non flooded land; Pasture.; Alimentação; Brachiaria Humidicola; Bubalus Bubalis; Engorda; Ganho de Peso; Pastejo; Pastagem; Raça.; Amazonia; Grazing; Weight gain.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381154

Uso direto de fertilizantes fosfatados para suplementação de bovinos no semi-árido.
Provedor de dados: 14
Autores: GUIMARAES FILHO, C.
Importância do fósforo, as fontes mais conhecidas e as fontes alternativas de fósforo - fosfato monoamoníaco e superfosfato tríplo: questão do fluor, econômica e a questão legal.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Suplementação; Fonte; Suplementation.; Alimentação; Bovino; Fosfato; Fósforo.; Grazing; Cattle; Phosphorus.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132175

Produção de carne de bovinos em pastagem cultivada em terra firme.
Provedor de dados: 14
Autores: LOURENÇO JUNIOR, J. de B.; CAMARÃO, A. P.; COSTA, N. A. da; RODRIGUES FILHO, J. A.; DUTRA, S.; CARVALHO, L. O. D. de M.; NASCIMENTO, C. N. B. do; HANTANI, A. K.
bitstream/item/32747/1/CPATU-BP148.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Bovino de corte; Bovine; Fattening; Stocking; Rate; Cultivated pasture; Management.; Bovino; Engorda; Ganho de Peso; Manejo; Pastejo; Pastagem Cultivada; Taxa de Lotação.; Grazing; Beef cattle; Weight gain.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378458

Observacoes preliminares sobre a suplementacao da mistura mineral ureia para bovinos em pastejo.
Provedor de dados: 14
Autores: THIAGO, L. R. L. de S.; SILVA, J. M. da.
bitstream/item/138474/1/COT-07.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Suplementacao; Brasil Central; Feeding; Supplements; Fattening; Central Brazil.; Bovino; Mineral; Nutrição; Pastejo; Seca; Uréia.; Terminação; Grazing; Cattle; Dry season; Urea.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/321305

Desempenho produtivo e reprodutivo de búfalas em sistema integrado de pastagens nativa e cultivada.
Provedor de dados: 14
Autores: LOURENÇO JUNIOR, J. de B.; COSTA, N. A. da; RODRIGUES FILHO, J. A.; CAMARAO, A. P.; MARQUES, J. R. F.; CARVALHO, L. O. D. de M.; NASCIMENTO, C. N. B. do; HANTANI, A. K.
bitstream/item/32714/1/CPATU-BP141.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Bubalino; Eficiência; Buffalo; Efficiency; Native pasture; Cultivated pasture; Production.; Ganho de Peso; Pastejo; Pastagem Cultivada; Pastagem Nativa; Produção; Reprodução.; Grazing; Reproduction; Weight gain.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380536

Influence of environment factors on bacterial ingestion rate of the deposit-feeder Hydrobia ulvae and comparison with meiofauna
Provedor de dados: 5
Autores: Pascal, Pierre-yves; Dupuy, C; Richard, P; Haubois, A.g.; Niquil, N.
Deposit feeders are able to process a considerable volume of sediment, containing large quantities of associated bacteria. However, conclusions concerning the trophic role played by benthic bacteria in marine sediments are still not fully elucidated. This study deals with bacterivory by the gastropod Hydrobia ulvae, one of the most abundant deposit-feeding species in intertidal mudflats in Western Europe. Ingestion rates of bacteria were determined during grazing experiments using 15N preenriched bacteria. Grazing experiments were performed in order to measure effects of abiotic (temperature, salinity and luminosity) and biotic (bacterial and algal abundances) factors on ingestion rates of bacteria by H. ulvae of an intertidal mudflat (Brouage,...
Tipo: Text
Palavras-chave: Mudflat; Nematodes; Ammonia tepida; Environmental factors; Grazing; Bacteria; Gastropod; Hydrobia ulvae; Deposit feeding.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4781.pdf

Ecologie bacterienne dans les bacs d'elevage larvaire de coquilles Saint-Jacques (Pecten maximus )
Provedor de dados: 5
Autores: Jacq, E; Moal, Jeanne; Samain, Jean-francois; Corre, S; Daniel, J; Nicolas, Jean-louis; Cochard, Jean-claude; Fera, P.
Larval rearings were performed with seawater either freshly pumped or after storage in a pond. Concerning bacterial populations these waters were characterized by a high diversity, little sized bacteria whose few of them (1%) were cultivable on Zobell medium. In the tanks, the bacterial ecosystem was modified by the presence of antibiotics, larvae and algae: the diversity was lowered, the cellular volume was increased by a factor 2 to 5, 100% bacteria were cultivable and chloramphenicol resistant, and their metabolism changed. Taxonomic screening showed no differences among the two waters neither at the beginning nor at the end of the rearings. However, depending on the water (stored or not) differences were identified for bacterial physiology and...
Tipo: Text
Palavras-chave: Marine aquaculture; Pond culture; Scallop culture; Ecology; Antibiotics; Organic matter; Grazing; Carbohydrates; Mathematical models; Modelling; Growth; Bacterial diseases; Biological production; Culture tanks; Larvae; Rearing.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-914.pdf

Pigment dynamics associated with the grazing of a ciliate and a flagellate feeding on a cyanobacterium
Provedor de dados: 5
Autores: Mostajir, B; Bustillos-guzman, J; Claustre, H; Rassoulzadegan, F.
The egestion of particulate material as well as pigment degradation during microzooplankton grazing on phytoplankton are poorly known processes. In an attempt to evaluate these processes, changes in pigment concentrations within various size fractions were monitored in batch cultures of an assemblage of a pelagic ciliate (Strombidium sulcatum) and a heterotrophic flagellate (Paraphysomonas sp.) feeding on a cyanobacterium (Synechococcus sp.) over a 10-day period. Chlorophyll a, carotenoids and phaeopigments were not found in the 0.1-0.7 mu m fraction while the pigments originally in the 0.7-3.0 mu m fraction (prey) were transferred into the &gt; 3.0 mu m size fraction (predator). During this transfer, the carotenoids (zeaxanthin and B-carotene) were not...
Tipo: Text
Palavras-chave: Pigment; Phéopigment; Broutage; Protozoaire; HPLC; Pigment; Phaeopigment; Grazing; Protozoa; HPLC.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43660/43209.pdf

Bacterivory in the common foraminifer Ammonia tepida: Isotope tracer experiment and the controlling factors
Provedor de dados: 5
Autores: Pascal, P.y.; Dupuy, C; Richard, P; Niquil, N.
The majority of sediment dweller foraminifera are deposit feeders. They use their pseudopodia to gather sediment with associated algae, organic detritus and bacteria. Uptake of bacteria by foraminifera have been observed but rarely quantified. We measured uptake of bacteria by the common foraminifera Ammonia tepida using 15N pre-enriched bacteria as tracers. In intertidal flats, seasonal, tidal and circadian cycles induce strong variations in environmental parameters. Grazing experiments were performed in order to measure effects of abiotic (temperature, salinity and irradiance) and biotic (bacterial and algal abundances) factors on uptake rates of bacteria. In mean conditions, A. tepida grazed 78 pgC ind-1 h-1 during the first eight hours of incubation,...
Tipo: Text
Palavras-chave: Trophoecology; Prey abundance; Mudflat; Grazing; Foraminifera; Environmental factor; Bacteria.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4298.pdf

Free-living nematodes affect oxygen turnover of artificial diatom biofilms
Provedor de dados: 5
Autores: Mathieu, M; Leflaive, J; Ten Hage, L; De Wit, R; Buffan Dubau, E.
The aim of the present study was to examine the effects of biofilm-dwelling nematode activity on the oxygen turnover of cultured diatom biofilms. Oxygen microprofiles were simultaneously measured using the microelectrode technique in biofilms incubated with and without nematodes during short-term (24 h) and medium-term (6 d) experiments. During 24 h nycthemeral incubations, maximum oxygen concentrations and oxygen peak depths of microprofiles, as well as net oxygen production rates, were significantly higher in the diatom biofilms with nematodes. These effects might be dependent on the densities of nematodes. In the present study, significant effects were observed at nematode densities exceeding 100 ind. cm(-2), but not at a density &lt;50 ind. cm(-2)....
Tipo: Text
Palavras-chave: Bioturbation; Grazing; Net production rate; Oxygen community metabolism; Microelectrode; Oxygen microprofile; Nematodes; Diatom biofilms.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3607.pdf

Influence of phytoplankton diet mixtures on microalgae consumption, larval development and settlement of the Pacific oyster Crassostrea gigas (Thunberg)
Provedor de dados: 5
Autores: Rico Villa, Benjamin; Le Coz, Jean-rene; Mingant, Christian; Robert, Rene.
Microalgae commonly used as feed for bivalves, Pavlova lutheri (P), Isochrisis affinis galbana (T) and Chaetoceros calcitrans forma pumilum (Cp), were fed to Pacific oyster Crassostrea gigas to assess their nutritional value for larval development and metamorphosis during two experiments. Monospecific, bispecific and trispecific diets were firstly evaluated during 3 weeks from D larvae to young postlarvae. Then bispecific diets, based on different T and Cp proportions, were assessed during a similar period. Concurrently, ingestion was studied through the whole larval and postlarval development for each diet and/or diet mixture. Because lipids are assumed to be a key nutrient for bivalves, biochemical analysis was undertaken on the second set of trials...
Tipo: Text
Palavras-chave: Lipids; Grazing; Metamorphosis; Growth; Larvae; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1707.pdf

Induction of Phlorotannins and Gene Expression in the Brown Macroalga Fucus vesiculosus in Response to the Herbivore Littorina littorea
Provedor de dados: 5
Autores: Emeline, Creis Bendelac; Ludovic, Delage; Laurent, Vallet; Catherine, Leblanc; Kruse, Inken; Erwan, Ar Gall; Florian, Weinberger; Philippe, Potin.
Mechanisms related to the induction of phlorotannin biosynthesis in marine brown algae remain poorly known. Several studies undertaken on fucoid species have shown that phlorotannins accumulate in the algae for several days or weeks after being exposed to grazing, and this is measured by direct quantification of soluble phenolic compounds. In order to investigate earlier inducible responses involved in phlorotannin metabolism, Fucus vesiculosus was studied between 6 and 72 h of grazing by the sea snail Littorina littorea. In this study, the quantification of soluble phenolic compounds was complemented by a Quantitative real-time PCR (qRT-PCR) approach applied on genes that are potentially involved in either the phlorotannin metabolism or stress responses....
Tipo: Text
Palavras-chave: Phlorotannins; Inducible defense; Gene expression; Grazing; Fucus vesiculosus.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00688/79981/82940.pdf

Analysis of larval oyster grazing by flow cytometry
Provedor de dados: 5
Autores: Chretiennot-dinet, Marie-josèphe; Vaulot, Daniel; Galois, Robert; Spano, Anna-maria; Robert, Rene.
The ingestion of 8 algal species by oyster larvae (Crassostrea gigas Thunberg, 1793) was measured by flow cytometry (FCM). In a preliminary experiment, cell size (estimated by light scatter) and chlorophyll fluorescence of 30 algal species were evaluated to select those species which could be mixed together and still be easily discriminated by FCM. Grazing experiments were carried out over 48 h with 6 and 15-day old larvae fed on 3 algal mixtures, each containing 3 different algal species. The concentration of each species was estimated at 0, 6, 12, 24 and 48 h by FCM. Grazing pressure on a given algal species was dependent upon the age of the larvae, the time of the day and the composition of the mixture. Grazing rates of older larvae were about twice...
Tipo: Text
Palavras-chave: Oyster larvae; Crassostrea gigas; Grazing; Algae; Selective feeding; Flow cytometry.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00090/20164/17817.pdf

Factors affecting bacterial biomass and growth in the Duplin River estuary and coastal Atlantic Ocean.
Provedor de dados: 5
Autores: Fallon, R; Newell, S; Sherr, B; Sheer, E.
Bacterial numbers and growth rates were measured in coastal, planktonic systems of the Western Atlantic ocean. Seasonal responses in growth rates of the bacterial assemblage were present at some sites, but these may be related to seasonal changes in substrate supply rather than to changes in temperature. Bacterial growth rates tended to decline with increasing distance from shore. There was evidence for predator-prey population cycles in the bacteria and &lt; 17 mu m protozoa in the Duplin River Estuary which may indicate that the bacterial assemblage serves as prey for protozoan populations. In summer, a significant negative correlation between mu (instantaneous growth rate) and cell numbers in the bacterial assemblage indicated that substrate limitation...
Tipo: Text
Palavras-chave: Protozoa; Plankton; Bacteria; Predators; Grazing; Temperature effects; Seasonal variations; Limiting factors; Interspecific relationships; Nutrients (mineral); Growth.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-955.pdf

Spring microzooplankton composition, biomass and potential grazing in the central Cantabrian coast (southern Bay of Biscay)
Provedor de dados: 5
Autores: Quevedo, M; Anadon, R.
Microzooplankton abundance, biomass and composition were investigated in the coastal waters of Asturias (southern Bay of Biscay) in May 1996. Abundance ranged from 0.7 x 10(3) to 8.5 x 10(3) cell.L-1 The protists community was dominated by aloricate ciliates averaging 82 % of microheterotrophs. Small aloricate ciliates, below 20 mu m in size, contributed 63 % to total ciliate abundance. Carbon biomass ranged from 2.4 to 15.4 mgC.m(-3), averaging 23 % of phytoplankton biomass. Aloricate ciliates were also the dominant component of biomass (56.2 %), but the importance of copepod nauplii increased in terms of carbon, averaging 28.5 % of total biomass. Microzooplankton biomass was significantly correlated with Chi a concentration in the water column....
Tipo: Text
Palavras-chave: Microzooplancton; Ciliés; Biomasse; Broutage; Golfe de Gascogne; Microzooplankton; Ciliates; Biomass; Grazing; Southern Bay of Biscay.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00324/43564/44061.pdf

Grazing affects carbon fixation pathways by phytoplankton in coastal marine ecosystems
Provedor de dados: 5
Autores: Collos, Y; Descolas Gros, C; Mornet, Francoise.
During parallel sampling of seawater samples in bottles and in free water (1000-2000 m(3) clay ponds), we have measured phytoplankton biomass, Ribulose biphosphate carboxylase (Rubisco), phosphoenol pyruvate carboxylase, and phosphoenol pyruvate carboxykinase activities and major nutrients (ammonium, nitrate, phosphate, silicate). This was done in two ecosystems: one with high grazing pressure due to the presence of oysters and another with low grazing pressure (no oysters). In the ecosystem subjected to high grazing pressure, anaplerotic carbon fixation by phytoplankton in free water was higher in the light period and could represent 25% of total carbon fixation. Incubating samples in bottles led to a major increase in Rubisco activity (80% in 3 h)...
Tipo: Text
Palavras-chave: Grazing; Carboxylases; Carbon assimilation; Anaplerotic; Ammonium.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-6437.pdf

Bacterivory by benthic organisms in sediment : Quantification using 15N-enriched bacteria
Provedor de dados: 5
Autores: Pascal, P.y.; Dupuy, C; Mallet, C; Richard, P; Niquil, N.
The fate of benthic bacterial biomass in benthic food webs is a topic of major importance but poorly described. This paper describes an alternative method for evaluation of bacterial grazing rate by meiofauna and macrofauna using bacteria pre-enriched with stable isotopes. Natural bacteria from the sediment of an intertidal mudflat were cultured in a liquid medium enriched with 15NH4Cl. Cultured bacteria contained 2.9% of 15N and were enriched sufficiently to be used as tracers during grazing experiments. Cultured bacteria presented a biovolume (0.21 &amp;#956;m3) and a percentage of actively respiring bacteria (10%) similar to those found in natural communities. The number of Operational Taxon Units found in cultures fluctuated between 56 and 75% of that...
Tipo: Text
Palavras-chave: Tracer; Stable isotope; Sediment; Grazing; Bacteria.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4296.pdf

Bacterivory of a mudflat nematode community under different environmental conditions
Provedor de dados: 5
Autores: Pascal, P.y.; Dupuy, C; Richard, P; Rzeznik-orignac, J; Niquil, Nathalie.
The fate of the benthic bacterial biomass is a topic of major importance in understanding how softbottom environments function. Because of their high abundance, production and nutritional value, benthic bacteria may constitute an important food resource for benthic fauna. The trophic role of bacteria for a nematode community on the Brouage mudflat (Marennes-Ole´ron-France), dominated by three species: Chromadora macrolaima (64% of the abundance), Daptonema oxycerca (15%) and Ptycholaimellus jacobi (8%), was determined in grazing experiments using 15N pre-enriched bacteria. On intertidal flats, seasonal, tidal and circadian cycles induce strong variations in environmental conditions. Grazing experiments were performed in order to measure the effects of...
Tipo: Text
Palavras-chave: Mudflat; Environmental factor; Grazing; Bacteria; Nematode.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4295.pdf

Historical Changes in Grazing Forms of Arabian Pastoralists in Syria
Provedor de dados: 19
Autores: HIRATA, Masahiro; FUJITA, Haruhiro; ISHIDA, Jyoken; KITAGAWA, Masayuki; MIYAZAKI, Akira; 平田, 昌弘; 藤田, 晴啓; 石田, 定顕; 北川, 政幸; 宮崎, 昭.
http://www.jaals.net/学会誌バックナンバー-投稿規定/
Palavras-chave: Historical change; Grazing; Arabian pastoralist; Motorization; Syria.
Ano: 1999
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3266

Preliminary Study of Microzooplankton Grazing and Community Composition in the North of South China Sea in Autumn.
Provedor de dados: 20
Autores: Su, Qiang; Huang, Liangmin; Tan, Yehui; Xu, Runlin; Li, Tao; Xu, Zhanzhou; Zhang, Janlin; Qiu, Dajun.
Microzooplankton community composition in the north of South China Sea was investigated during autumn (between September and October), 2004. Dilution technique using chlorophyll a (Chl a) was employed to estimate grazing rates and grazing pressure. The results showed that Polymenophorea Oligotrichida was the dominant group with 16 species, and there were 4 species in Oligotrichina and 11 species in Tintinnina. The ciliates abundance ranged from 9 to 102 ind/m3. Instantaneous growth rates of phytoplankton (k) varied from 0.03 / d to 2.13 / d. Grazing rates of microzooplankton(g) ranged between 0.01 / d and 1.06 / d. The grazing pressure on initial phytoplankton stock (Pi) and primary production (Pp) was 0.089 % - 65.23 % and 33.63 % - 86.04 %, respectively....
Tipo: Journal Contribution
Palavras-chave: Grazing; Community composition; Dilution.
Ano: 2007
URL: http://hdl.handle.net/1834/5862

Interpretation of particle spectra of electronic counters by microscopical methods
Provedor de dados: 27
Autores: Bakker, C.; Prins, T.C.; Tackx, M.L.M.
1. Using monocultures or single species dominated natural phytoplankton, cell counts and volume estimations obtained by visual and electronic methods show reasonable agreement.Calibration seems possible (Figs.1-2).2. Further examples given (Fig. 3-4) show that microscopical identification of the volume peaks in electronic counter spectra of natural seston is not quite simple. Phytoplankton peaks may not be detected in the Counter spectrum. Shifts of Counter peaks to the left side of the visual spectrum may be found when cylindrical, elongated or needle- like phytoplankton dominate the sample.3. Both visual and electronic methods include potentially large errors. Possibly particle volume is either overestimated by the microscope and / or underestimated by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Detritus; Grazing; Measuring devices; Particle counters; Particle size; Phytoplankton; Zooplankton.
Ano: 1985
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3195

Calculations of results in grazing experiments using the counting method
Provedor de dados: 27
Autores: Tackx, M.L.M.; Van de Vrie, E.M.
Different formulae used in the literature for calculation of ingestion rates are reviewed. Their applicability is discussed in relation to two criteria: the occurrence of saturation of the feeding and/or growth of the food particles. It is shown by simulations that the differences in results obtained by calculating ingestion following a linear or an exponential model are restricted to a few percent. Calculation of ingestion rates by substantial over- or underestimation depending on the growth constant of the food particles and the grazing time.The formula I = Vk(C&lt;sub&gt;zt&lt;/sub&gt;C&lt;sub&gt;zo&lt;/sub&gt;e&lt;sup&gt;kt&lt;/sup&gt;)/N(I-e&lt;sup&gt;kt&lt;/sup&gt;) is proposed for the calculation of ingestion rates under saturated circumstances.It...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food intake; Food intake; Grazing; Ingestion; Mathematical analysis; Measuring devices; Phytoplankton; Zooplankton.
Ano: 1985
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3212

Effect of incubation time and concentration of animals in grazing experiments using a narrow size range of particles
Provedor de dados: 27
Autores: Tackx, M.; Polk, P.
Three concentrations of &lt;i&gt;A. tonsa&lt;/i&gt; adults were allowed to feed on a narrow size range suspension of particles. Sampling was done at 4-hour intervals during 24 hours. It is shown that both animal concentration and incubation time considerably influence the obtained ingestion rates and filtering-spectra. These results are discussed in relation to different calculation methods and models.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing; Incubation.
Ano: 1986
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3192

Foraging behavior and ruminal fermentation of dairy cows grazing ryegrass pasture alone or with white clover
Provedor de dados: 86
Autores: Ribeiro Filho,Henrique Mendonça Nunes; Peyraud,Jean-Louis; Delagarde,Rémy.
The objective of this work was to evaluate the influence of pasture composition and regrowth age on the relationship between feeding behavior and ruminal fermentation in dairy cows grazing perennial ryegrass with or without white clover. The experiment was carried out in a 2x2 factorial arrangement, with two sward types and two ages of regrowth. Swards of perennial ryegrass sown alone (PRG) and of perennial ryegrass mixed with white clover (GC) were evaluated. Twelve late-lactation Holstein cows, fistulated at the rumen, were distributed in a 4x4 latin square experimental design with four 12-day periods. Daily distribution of grazing was similar in the PRG and the GC swards, but the concentration of rumen volatile fatty acids (VFA) was higher and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lolium perenne; Trifolium repens; Digestion; Grazing; Grazing time.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000300019

Aboveground biomass and concentration of nutrients in semiarid rangeland plant species: Influence of grazing and soil moisture
Provedor de dados: 85
Autores: Gul,B; Islam,M; Ahmad,S; Gul,S.
Spatial and temporal patterns of aboveground biomass and nutritive value of rangeland species with respect to the influence of grazing and soil moisture were investigated. The research was conducted during two years at the Tomagh Research Station, near Sanjawi, Ziarat District, Balochistan, Pakistan. This area is protected from grazing since 1998; however, some of the area is open for grazing. Tree sites were selected for research purposes: a protected plain, a protected hilly, and an unprotected plain grazed area. Sampling was carried out during the spring, summer and autumn seasons. Results revealed that soil moisture was greater at the protected than unprotected sites. The aboveground plant biomass was 66% to 76% lower at unprotected than protected...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rangeland; Biomass production; Season; Semiarid; Grazing; Grass.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100013

Contribution of different bud types to community regeneration on a typical steppe under various enclosure durations in Inner Mongolia, China
Provedor de dados: 85
Autores: Qian,J; Wang,Z; Liu,Z; Kuang,W; Busso,CA.
Understanding the changes in the total bud bank, and its contribution to community regeneration, in response to grassland enclosure to livestock grazing, is crucial for grassland management. Despite its importance, the contribution of the total bud bank and that of different bud types to community regeneration as a whole have been rarely explored. The vegetative offspring recruited from different bud types was investigated in grasslands having different enclosure durations to livestock grazing on a typical steppe of Inner Mongolia, China. Total vegetative offspring density was significantly higher (p&lt;0.05) under continuous grazing than in fenced grasslands, but no significant changes were found among plots with different enclosure durations to livestock...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing; Bud banks; Vegetative regeneration; Reproduction ecology; Restoration ecology.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200024

CHAPA, BEEF COW/CALF HEALTH AND PRODUCTIVITY AUDIT, PART IV: BEEF COW/CALF BREEDING MANAGEMENT
Provedor de dados: 31
Autores: Dargatz,   David.
As part of the National Animal Health Monitoring System (NAHMS ), USDA:APHIS:Veterinary Services conducted a national study of beef production, the Beef Cow/Calf Health and Productivity Audit (CHAPA). This study was designed to provide both participants and the industry with information on cow/calf health, productivity, and management practices. The National Agricultural Statistics Service (NASS) collaborated with USDA:APHIS:VS to select a producer sample that was statistically designed to provide inferences about the nation's cow/calf population. Data for Part IV: Beef Cow/Calf Breeding Management were collected by federal and state veterinary officers (VMO's) in 18 of the largest cow/calf producing states between July 1 and July 30, 1993. These 18 states...
Tipo: Report
Palavras-chave: NAHMS; Epidemiology; Beef cattle; Calves; Breeding; Mortality; Grazing; Trichomonas fetus; Vaccination; Deworming; Palpation; Livestock Production/Industries.
Ano: 1994
URL: http://purl.umn.edu/32753

Economic Potential of Substituting Legumes for Synthetic Nitrogen in Warm Season Perennial Grasses used for Stocker Cattle Grazing
Provedor de dados: 31
Autores: Kering,   Maru K.; Biermacher,   Jon T.; Reuter,   Ryan; Butler,   Twain; Springer,   Job D.; Rogers,   James K.; Blanton,   John, Jr.; Bouton,   Joe H.; Guretzky,   John A.
Stocker cattle grazing warm season perennial grasses is an important economic activity in the southern Great Plains.  Substantial increases in the price of nitrogen fertilizer is negatively affecting forage producers’ profitability.  Two alternative nitrogen management systems that use annual and perennial legumes have been developed for bermudagrass pastures.  The goal of the study is to determine if the legumes systems are more profitable than the conventional practice of applying synthetic sources of nitrogen.  Results of the two-year grazing study show that the legume systems could not compete economically with the common practice.
Tipo: Conference Paper or Presentation
Palavras-chave: Economics; Grazing; Legumes; Bermudagrass; Nitrogen fertilizer; Stocker cattle; Crop Production/Industries; Farm Management; Production Economics.
Ano: 2010
URL: http://purl.umn.edu/56525

Estimating the economic implications for grazing properties in the Mackay Whitsunday catchments of practice changes to more sustainable landscapes
Provedor de dados: 31
Autores: East,   Miriam.
In the Mackay Whitsunday region, the dominant grazing based operations are small intensive systems that heavily utilise soil, nutrient and chemical management practices. To improve water quality entering the Great Barrier Reef, graziers are being encouraged to adopt improved management practices. However, while there is good understanding of the management changes required to reach improved practice classification levels, there is poor understanding of the likely economic implications for a grazier seeking to move from a lower level classification to the higher level classifications. This paper provides analysis of the costs and benefits associated with adoption of intensive grazing best management practices to determine the effect on the profitability and...
Tipo: Conference Paper or Presentation
Palavras-chave: Grazing; Management practices; Incentives; Mackay Whitsunday; Farm Management.
Ano: 2010
URL: http://purl.umn.edu/59070

Optimising woody-weed control
Provedor de dados: 31
Autores: Zull,   Andrew F.; Cacho,   Oscar J.; Lawes,   Roger A.
Woody weeds pose significant threats to the 12.3 billion dollar Australian grazing industry. These weeds reduce stocking rate, increase mustering effort, and impede cattle access to waterways. Two major concerns of woody-weed management are the high cost of weed management with respect to grazing gross margins, and episodic seedling recruitments due to climatic conditions. This case study uses a Stochastic Dynamic Programming (SDP) model to determine the optimal weed management decisions for chinee apple (Ziziphus mauritiana) in northern Australian rangelands to maximise grazing profits. Weed management techniques investigated include: no-control, burning, poisoning, and mechanical removal (blade ploughing). The model provides clear weed management...
Tipo: Conference Paper or Presentation
Palavras-chave: Woody weeds; Weed control; Chinee apple; Rangelands; Grazing; Stochastic dynamic programming; Livestock Production/Industries.
Ano: 2009
URL: http://purl.umn.edu/47620

Understanding U.S. Consumer Demand for Milk Production Attributes
Provedor de dados: 31
Autores: Wolf,   Christopher A.; Tonsor,   Glynn T.; Olynk,   Nicole J.
A choice experiment was used to examine the value of various fluid milk attributes. Respondents were surveyed regarding half or whole gallon milk purchases. A split-sample design was used to examine consumer inferences regarding food safety. Willingness to pay for verification of production process attributes varied across attributes and verifying entity. Consumers were generally willing to pay substantial premiums for milk produced without the use of rbST, on local family farms, with assured food safety enhancement, and for these claims to be verified by the U.S. Department of Agriculture.
Tipo: Journal Article
Palavras-chave: Milk; Food safety; Grazing; RbST; Family farm; Local; Willingness to pay; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety.
Ano: 2011
URL: http://purl.umn.edu/117186

Unravelling the economic and environmental tradeoffs of reducing sediment movement from grazed pastures
Provedor de dados: 31
Autores: Donaghy,   Peter; Rolfe,   John; Gaffney,   James.
An undesirable consequence of grazing activities in eastern Australia is the quantity of sediment emptying into the Great Barrier Reef Lagoon. One of the challenges to reducing sediment loads stems from the lack of private incentives to improve land management practices. There is also a poor understanding of the financial implications resulting from the adoption of sustainable management practices, and, in particular the lack of scientific and economic knowledge linking on-farm management actions to catchment scale impacts. Bio-economic modelling has been used to identify the economic and environmental trade-offs encountered when grazing strategies are altered to reduce off-farm sediment movement from a black spear grass pasture in central Queensland.
Tipo: Conference Paper or Presentation
Palavras-chave: Bioeconomic modelling; Grazing; Economic and environmental; Environmental Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/10417

Expected Utility Analysis of Stocker Cattle Ownership Versus Contract Grazing in the Southeast
Provedor de dados: 31
Autores: Anderson,   John D.; Lacy,   Curt; Forrest,   Charlie S.; Little,   Randall D.
Stocker cattle ownership is compared to contract grazing using stochastic simulation.  Returns are evaluated for both cattle owners and caretakers in contract grazing agreements.  For caretakers, contract grazing is significantly less risky than cattle ownership.  Slightly to moderately risk-averse caretakers could be expected to prefer some type of contract grazing to direct ownership of cattle.  For cattle owners, contracting reduces risk only slightly while significantly reducing expected returns.
Tipo: Journal Article
Palavras-chave: Contracts; Expected utility; Grazing; Stocker calves; Q0; L1.
Ano: 2004
URL: http://purl.umn.edu/43471

SISTEMAS ECOLÓGICOS DE PRODUÇÃO DE SEMENTES E FORRAGEM DE FEIJÃO-MIÚDO
Provedor de dados: 31
Autores: Bevilaqua,   Gilberto Antonio Peripolli; Antunes,   Iraja Ferreira; Marques,   Robson Luis Legorio; Maia,   Manoel Souza.
A cultura do feijão-miúdo tem crescido em importância na região de clima temperado, principalmente em áreas da agricultura familiar, utilizando sistemas de base ecológica, visando a alimentação de ruminantes. Na região da planície costeira do Rio Grande do Sul a cultura apresenta grande desenvolvimento e tem se espalhado mais recentemente para outras áreas, no entanto sem informações técnicas sobre o seu manejo. A rusticidade da planta é reconhecida largamente, vegetando bem em solos mal drenados, arenosos e de baixa fertilidade, salinos e com baixa disponibilidade de água, sendo especialmente indicada como recuperadora de solo. Sua multiplicidade de usos tornou-a uma importante opção aos agricultores familiares, podendo ser utilizada além de recuperadora...
Tipo: Conference Paper or Presentation
Palavras-chave: Vigna unguiculata; Fenologia; Variabilidade; Pastoreio; Leite; Fenology; Variability; Grazing; Milk; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/109773

The role of grazier motivations and risk attitudes in the adoption of grazing best management practices
Provedor de dados: 31
Autores: Greiner,   Romy; Miller,   Owen; Patterson,   Louisa.
The onus on landholders in relation to environmental performance is ever increasing. One tool for achieving environmental improvements is the design and promotion of region-specific ‘best management practices’ (BMPs). These are conservation practices aimed at reducing diffuse source pollution from agricultural lands and thus improving end-of-catchment water quality. A suite of grazing BMPs were developed for the Burdekin Dry Tropics region in a consultative fashion but without explicit consideration of knowledge of adoption processes. It is known from the literature that farmers’ goals and risk perceptions in particular influence adoption decisions. This paper utilises the data from an earlier grazier survey to explore to what extent grazier motivations...
Tipo: Conference Paper or Presentation
Palavras-chave: Conservation practices; Adoption; Water quality; Grazing; Burdekin River catchment; Best management practices; Risk management; Motivations; Empirical research; Correlations; Factor analysis; Environmental Economics and Policy; Farm Management; Risk and Uncertainty.
Ano: 2008
URL: http://purl.umn.edu/6002

What Price for the Right to Go a-Droving? A Derived Demand Approach
Provedor de dados: 31
Autores: Marshall,   Graham R.; Cacho,   Oscar J.; John,   Fatmata.
Travelling stock reserves (TSRs) were established in Australia as a way of allowing the passage of livestock through settled lands to facilitate stocking of new lands. Subsequently, they remained important as a way of moving livestock from property to property or from property to market. Today, the area of land dedicated to TSRs in NSW is estimated at 2.3 million hectares, which are used more as a source of feed than as a livestock thoroughfare. The value of TSRs as a source of feed is particularly important during drought periods, and pricing of access for walking stock has become a subject of contention within the Rural Land Protection Boards (RLPB). The price of TSR permits for walking stock is considerably lower than for agistment, thereby compromising...
Tipo: Working or Discussion Paper
Palavras-chave: Travelling stock reserves; Derived demand; Grazing; Linear programming; Demand and Price Analysis; Livestock Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/12917

Economic Returns to Different Stocking Rates for Cattle on Ryegrass under Contract Grazing and Traditional Ownership
Provedor de dados: 31
Autores: Zaragoza-Ramire,   Jose-Luis; Bransby,   David; Duffy,   Patricia A.
Economic returns to stocker production were estimated using results of a grazing experiment.  If resources to buy cattle are not limited, traditional ownership was superior to contract grazing under all but extremely unfavorable price spreads.  If capital to purchase stockers is limited, contract grazing may provide more returns.
Tipo: Conference Paper or Presentation
Palavras-chave: Stockers; Grazing; Ryegrass; Livestock Production/Industries; Q100.
Ano: 2006
URL: http://purl.umn.edu/35477

Investment Analysis of Alternative Dairy Systems under MILC
Provedor de dados: 31
Autores: Eberle,   Phillip R.; Moody,   Darren E.; Rendleman,   C. Matthew; Peterson,   William C.
Three dairy systems, 120-cow grazing, 120-cow conventional, and 600-cow concentrated, were evaluated by internal rate of return (IRR) accounting for the Milk Income Loss Contract (MILC).  With MILC, the grazing and conventional systems had higher IRRs.  Without MILC, the 600-cow dairy had the highest IRR.  Results were sensitive to assumptions.
Tipo: Conference Paper or Presentation
Palavras-chave: Concentrated feeding; Conventional; Grazing; Internal rate of return; Livestock Production/Industries.
Ano: 2005
URL: http://purl.umn.edu/35559

Methods of Change and Financial Performance of Dairy Farms Before and After a Switch to Management Intensive Grazing
Provedor de dados: 31
Autores: Taylor,   Philip Eugene.
Interest in Management Intensive Grazing (MIG) of dairy cattle has increased during the last 2 decades. Most dairy producers utilizing MIG were former confinement or non-intensive pasture operations while the others started their operation with MIG. While research publications tout the financial and other benefits of MIG, often comparing them to non-MIG dairies, and anecdotal evidence in popular farm press has shown MIG in a favorable light, comparing a MIG dairy farm to itself before and after the management switch has not been a subject of research scrutiny. Knowing the potential impact of a switch to MIG prior to making a management decision to do so would be a significant piece of information for a dairy farm to understand if contemplating such a...
Tipo: Thesis or Dissertation
Palavras-chave: Dairy; Grazing; Economics; Pasture; Management; Farm; Farm Management; Livestock Production/Industries; Production Economics; Q10; Q12; Q19.
Ano: 2009
URL: http://purl.umn.edu/56008

Pasture-Based Dairy Systems: Who Are the Producers and Are Their Operations More Profitable than Conventional Dairies?
Provedor de dados: 31
Autores: Gillespie,   Jeffrey M.; Nehring,   Richard F.; Hallahan,   Charles B.; Sandretto,   Carmen L.
U.S. dairy operations are sorted via a multinomial logit model into three production systems: pasture-based, semi-pasture-based, and conventional. Region, farm size, financial situation, and production intensity measures impact system choice. Analysis follows to determine the impact of production system on enterprise profitability. Region, farm size, and demographic variables impact profitability, as does system choice: semi-pasture-based operations were less profitable than conventional operations on an enterprise, per hundredweight of milk produced basis. Significant differences were not found in the profitability of pasture-based operations versus those using other systems.
Tipo: Journal Article
Palavras-chave: Dairy farm size; Grazing; Pasture-based dairying; Livestock Production/Industries.
Ano: 2009
URL: http://purl.umn.edu/57630

Physical properties of dystrophic Red Latosol (Oxisol) under different agricultural uses
Provedor de dados: 90
Autores: Tavares Filho,João; Barbosa,Graziela Moraes de Cesare; Ribon,Adriana Aparecida.
Obtaining information about soil properties under different agricultural uses to plan soil management is very important with a view to sustainability in the different agricultural systems. The aim of this study was to evaluate changes in certain indicators of the physical quality of a dystrophic Red Latosol (Oxisol) under different agricultural uses. The study was conducted in an agricultural area located in northern Paraná State. Dystrophic Red Latosol samples were taken from four sites featuring different types of land use typical of the region: pasture of Brachiaria decumbens (P); sugarcane (CN); annual crops under no-tillage (CAPD); and native forest (permanent conservation area) (control (C)). For each land use, 20 completely randomized, disturbed and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Land degradation; Land use; Grazing; Sugarcane; No-tillage farming.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300034

Santa Inês sheep supplementation on urochloa grass pasture during the dry season: intake, nutrient digestibility and performance
Provedor de dados: 96
Autores: Almeida,Paulo José Presídio; Pereira,Mara Lúcia Albuquerque; Silva,Fabiano Ferreira da; Santos,Alana Batista dos; Pereira,Taiala Cristina de Jesus; Santos,Edileusa de Jesus dos; Moreira,Jeruzia Vitória.
This study was conducted with the objective of evaluating the effect of concentrate supplementation, formulated with different ingredients (Mesquite pod meal, sorghum meal or wheat meal and mineral supplementation) on performance, intake and digestibility of nutrients in Santa Inês lambs grazing on urochloa grass during the dry season. Twenty-four uncastrated weaned Santa Inês sheep, with average body weight (BW) 20±2 kg with an average of 120 days of age were used in the assay. The experiment lasted 75 days. The animals grazing deferred Urochloa grass (Urochloa mosambicensis (Hack) Daudy) were distributed into four treatments consisting of mineral supplementation provided ad libitum and concentrated supplements containing mesquite pod meal, sorghum meal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alternative food; Grazing; Multiple supplement; Semiarid; Urochloa mosambicensis (Hack) Daudy; Weight gain.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300029

Voluntary intake of dry matter and performance of Nellore cows and their Nellore and crossbred Simental × Nellore calves
Provedor de dados: 96
Autores: Vargas Junior,Fernando Miranda de; Wechsler,Francisco Stefano; Rossi,Patrícia; Oliveira,Marcus Vinicius Morais de; Schmidt,Patrick.
This study aimed to investigate the influence of calf genetic group on the performance of Nellore lactating cows. The variables studied included milk ingestion, pasture intake, calf weight gain and cow body weight. A total of 13 Nellore calves and 8 crossbred Simental × Nellore calves were used, all born from Nellore mothers. During the experimental period of 210 days, calves were weighted at birth and at 30-day intervals, whereas cows were weighed every 14 days. Milk intake was estimated using the weigh-suckle-weigh method. Pasture intake was determined 6, 12, and 24 weeks after birth by using chromic oxide as an external marker and indigestible acid detergent fiber as an internal marker. Average weight of crossbred calves was 10.1 kg and their milk...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crossing; Grazing; Milk; Weight gain.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001100040

Ingestive behavior and performance of female lambs grazing on Marandu palisadegrass under different stocking rates
Provedor de dados: 96
Autores: Vieira Júnior,Luiz Carlos; Cabral,Luciano da Silva; Zervoudakis,Joanis Tilemahos; Abreu,Joadil Gonçalves de; Souza,Alexandre Lima de; Morenz,Mirton José Frota.
The ingestive behavior and performance of female lambs grazing on Marandu pasture submitted to different stocking rates during the rainy and transition season were evaluated. The experimental area with 4,500 m² was divided into 45 paddocks of 100 m². Twenty-seven Santa Ines female lambs (purebred) with 4 months age and 22 kg of initial body weight were distributed in a completely randomized design, with nine replicates. Lambs were divided into 9 groups with the same initial weight and submitted to three stocking rates: 2, 3 and 4 lambs/paddock, which corresponded to 40, 60 and 80 lambs/ha, respectively. Each group of animals had a module of five paddocks, managed on intermittent grazing system, with 7 days of occupation and 28 d of rest. Increase on time...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Average daily gain; Gain per area; Grazing; Resting; Rumination; Sheep.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001100011

Ingestive behavior of Nellore cows and their straightbred or crossbred calves
Provedor de dados: 96
Autores: Vargas Junior,Fernando Miranda de; Wechsler,Francisco Stefano; Rossi,Patrícia; Oliveira,Marcus Vinicius Morais de; Schmidt,Patrick.
This trial aimed to investigate the influence of calf genetic group on the ingestive behavior of Nellore dams and their offspring on pasture. Twenty one primiparous and multiparous Nellore cows were assigned to the experiment; 13 cows nursed straightbred Nellore calves; and eight cows nursed halfbred Simmental × Nellore calves. The observations started in the morning, as soon as identification of the animals in daylight was possible, and they lasted until after sunset, when identification became impossible. The observations were made at 3, 6, 12, 24 and 30 weeks after calving. The following events were continuosly observed: grazing, rumination, idleness, water and mineral intake, and suckling frequency and length.. The dams of straightbreds showed a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crossbreeding; Grazing; Idleness; Rumination; Suckling.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000300026

Canopy structure and forage nutritive value of elephantgrass subjected to different stocking rate and N fertilization in the “Mata Seca” ecoregion of Pernambuco
Provedor de dados: 96
Autores: Dourado,Diego Loiola; Dubeux Junior,José Carlos Batista; Mello,Alexandre Carneiro Leão de; Santos,Mércia Virginia Ferreira dos; Lira,Mário de Andrade; Freitas,Erinaldo Viana de; Apolinário,Valéria Xavier de Oliveira; Santos,Erick Rodrigo da Silva.
ABSTRACT The objective was to evaluate the effect of three stocking rates (2, 3.9, and 5.8 animal units ha−1) and three fertilization levels (0, 150, and 300 kg N ha−1 yr−1) on herbage mass and nutritive value of elephantgrass (Pennisetum purpureum Schum.) cv. IRI-381. The experiment was conducted from May to August of 2009 and 2010 in Itambé, PE, Brazil, during the rainy season. Treatments were allocated in a split-plot arrangement in a completely randomized block design. The variables measured included leaf mass (pre- and post-grazing), botanical composition, soil cover, leaf area index, light interception, leaf angle, and concentrations of dry matter, organic matter, N, and in vitro digestible dry matter. When fertilized with 300 kg N ha−1 yr−1, leaf...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing; Livestock; Nitrogen; Pasture; Pennisetum purpureum.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100400

Grazing patterns on signalgrass pasture according to location of cattle feces
Provedor de dados: 96
Autores: Santos,Manoel Eduardo Rozalino; Fonseca,Dilermando Miranda da; Gomes,Virgílio Mesquita; Braz,Thiago Gomes dos Santos; Silva,Simone Pedro da; Albino,Ronan Lopes; Santos,Andreza Luzia; Silva,Guilherme Portes.
This study was conducted to evaluate the defoliation patterns on B. decumbens cv. Basilisk (signalgrass) tiller as a function of influence of feces deposited naturally by cattle. The signalgrass was managed with an average height of 25 cm, under continuous stocking and variable stocking rate. Interval and intensity of defoliation, grazing efficiency and forage loss were evaluated in two sites on pasture - one close and the other distant from feces. The completely randomized block design with three replications was adopted. The defoliation rate of the pasture site close to feces was 40% lower than at that distant from feces. This response pattern was similar to defoliation intensity of leaf blade. The leaf blade of the tiller close to feces also achieved...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria decumbens; Grazing; Sward structure; Tiller.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400010

Behavior pattern of beef heifers supplemented with different energy sources on oat and ryegrass pasture
Provedor de dados: 96
Autores: Pizzuti,Luiz Angelo Damian; Alves Filho,Dari Celestino; Brondani,Ivan Luiz; Pacheco,Paulo Santana; Freitas,Leandro da Silva; Segabinazzi,Luciane Rumpel; Callegaro,Álisson Marian; Teixeira,Odilene de Souza.
The objective of this study was to evaluate behavior patterns of heifers grazing on black oat (Avena strigosa Schreb.) and ryegrass (Lolium multiflorum Lam.), fed supplementation with brown rice meal and/or protected fat. A total of 28 Charolais × Nellore crossbred heifers at average initial age of 18 months and with initial live weight of 274.9±4.97 kg were used in the experiment. Animals were kept in oat + ryegrass pastures and distributed in the following treatments: no supplementation; Megalac (MEG): protected fat supplementation; supplementation with brown rice meal (BRM); and supplementation with BRM + MEG. The neutral detergent fiber (NDF) intake of pasture either in kg or in percentage of live weight was not changed by supply of supplement, but...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feeding stations; Grazing; Idle; Neutral detergent fiber; Number of bites; Rumination.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000800017

Models for estimating feed intake in small ruminants
Provedor de dados: 96
Autores: Pulina,Giuseppe; Avondo,Marcella; Molle,Giovanni; Francesconi,Ana Helena Dias; Atzori,Alberto Stanislao; Cannas,Antonello.
This review deals with the most relevant limits and developments of the modeling of intake of sheep and goats reared intensively and extensively. Because small ruminants are normally fed ad libitum, voluntary feed intake is crucial in feeding tactics and strategies aimed at optimal animal production. The effects of genetic, neuroendocrine, hormonal, feed and environmental factors on voluntary feed intake were discussed. Then, several mathematical models to estimate dry matter intake (DMI) were examined, with emphasis on empirical models for sheep and goats in intensive farm systems or in extensive areas under pasture or rangeland conditions. A sensitivity analysis of four models of prediction of DMI in housed lactating dairy sheep and meat sheep breeds was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dry matter intake; Feedlot; Goats; Grazing; Modeling; Sheep.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000900010

Independent effects of grazing and tide pool habitats on the early colonisation of an intertidal community on western Antarctic Peninsula
Provedor de dados: 97
Autores: Segovia-Rivera,V; Valdivia,N.
BACKGROUND: Prevailing environmental conditions can modulate the structuring role of biotic interactions. In intertidal habitats, less stressful environmental conditions and/or higher grazer densities may allow grazing effects to be stronger in tide pools than on emergent rocks. To test this hypothesis, we conducted a manipulative experiment on an intertidal rocky shore in Fildes Bay, King George Island, in which the effect of the dominant grazer Nacella polaris on the structure of benthic periphyton communities was compared between emergent rock and tide pool habitats. Also, we determined the spatial variation in density, weight, and maximum length of individuals of N. polaris in both habitats RESULTS: The density of N. polaris was significantly larger in...
Tipo: Journal article
Palavras-chave: Antarctica; Environmental stress model; Grazing; Herbivory; Intertidal; Nacella polaris; Periphyton.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2016000100003

NITROGEN SOIL BUDGETS IN CONTRASTING DAIRY GRAZING SYSTEMS OF SOUTHERN CHILE, A SHORT-TERM STUDY
Provedor de dados: 127
Autores: Núñez,R.P; Demanet,R; Alfaro,M; Mora,M.L.
In recent years, the intensification of livestock production in Southern Chile has resulted in a high potential for environmental damage through nitrogen (N) losses, creating the need for the evaluation of N flows from these systems. The aim of the research was to determine N budgets and N use efficiency in two grazing systems in Southern Chile. For this, inputs and outputs were measured during one year on two grazing systems (heavy grazing, HG; and light grazing, LG). Also, a control treatment with no grazing (C) was considered. The annual N soil budget was determined by the difference between all N inputs (£ inputs) and all N outputs (X outputs). The results of the experiment indicate that HG treatments received the biggest N input (427, 359 and 288 kg N...
Tipo: Journal article
Palavras-chave: Nitrogen budgets; Grazing; Nitrogen use efficiency; Nitrogen losses; Pasture.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000200008

GRAZING MANAGEMENT, AMMONIA AND NITROUS OXIDE EMISSIONS: A GENERAL VIEW
Provedor de dados: 127
Autores: Núñez,Pedro; Demanet,Rolando; Matus,Francisco; Mora,Maria de la Luz.
The grazing management of grassland has a direct effect on nitrogen (N) recycling. This is an important reason why management has become an alternative to improve the grassland production and quality, in turn to make it more suitable for the environment. However, the livestock system intensification induces changes in the natural dynamics of the N cycle, accelerating gas emmisions (e.g. ammonia, NH3 and nitrous oxide, N(2)0) and leaching losses from soil under grazing. When the amount of N in the environment increases, there is an impact on smog episodes, global warming, stratospheric ozone depletion, acid rain and eutrophication of fresh water. There are different techniques to evaluate the gases emitted from the soil. This klonowledge is useful to design...
Tipo: Journal article
Palavras-chave: Ammonia; Grazing; Management; Nitrogen; Nitrous oxide; Livestock.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912007000300006

NUTRIENTS BALANCES IN BEEF CATTLE PRODUCTION SYSTEMS AND THEIR IMPLICATIONS FOR THE ENVIRONMENT
Provedor de dados: 127
Autores: Alfaro,M; Salazar,F. S; Oenema,O; Iraira,S; Teuber,N; Ramirez,L; Villarroel,D.
The main inputs and outputs of nitrogen (N) and phosphorus (P) in soils and swards under typical Southern Chilean conditions were determined between 2004-2005 and 2006-2007 to establish soil and field gate N and P balances under different immediate stocking rates (63 and 191 anim ha-1 d-1) and field slope treatments (4 and 12%). Treatments received 67.5 and 40 kg N and P ha-1 yr-1 as inorganic fertilizer. The main N and P input to the soil balances was N mineralization (304 kg ha-1 yr-1) and inorganic fertilizer (62 and 69% for N and P, respectively). The main output for all treatments was plant uptake (95% and 100% on average for N and P, respectively). The N and P apparent use efficiency was high (&gt;95%). The main N and P input to field gate balances...
Tipo: Journal article
Palavras-chave: Stocking rate; Field slope; Grazing; Nutrient budget.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912009000100004

Estimating forage intake of lactating dual-purpose cows using chromium oxide and n-alkanes as external markers
Provedor de dados: 63
Autores: Oliveira,Dimas Estrasulas de; Medeiros,Sérgio Raposo de; Tedeschi,Luis Orlindo; Aroeira,Luís Januário Magalhães; Silva,Sila Carneiro da.
The n-alkanes have been used to estimate forage dry matter intake, digestibility and the diet composition in grazing animals. The objective this study was to compare chromium oxide and n-alkanes techniques used to estimate forage intake. Twenty lactating dual-purpose cows receiving two sources of fat (treatments: conjugated linoleic acid (CLA) or Megalac (control)) plus 4 kg of concentrate were dosed with n-alkanes and chromium oxide to estimate the intake of stargrass (Cynodon nlemfüensis Vanderyst var. nlemfüensis). The in vitro dry matter (DM) digestibility of the stargrass and concentrate were used to estimate the nutritive value of the digesta. The n-alkanes between C23 and C36 were quantified in the digesta and feces. The regression between...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diet composition; Digestibility; Grazing.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000200001

Conjugated linoleic acid of dairy foods is affected by cows’ feeding system and processing of milk
Provedor de dados: 63
Autores: Ruiz,Juan Pablo Avilez; Alonzo,Marcelo Wladimir; Pertíñez,Manuel Delgado.
ABSTRACT The distribution of conjugated linoleic acid (CLA) in dairy products commercially available in Chile is poorly understood. This study aimed to assess the content of CLA in dairy cow products from Chile and the effect of processing fresh milk into dairy products. Samples of raw milk were categorized into two groups based on the animal feeding system utilized by the dairy farm: 1) grazing based systems (Los Lagos region); and 2) housing systems using total mixed ration (TMR) diets (Los Angeles region). Simultaneously, commercial samples of condensed milk, powdered milk, butter and Gouda cheese were analyzed. Furthermore, samples of raw milk and processed products (powdered and sweetened condensed milk) were also analyzed. Dairy farms based on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CLA; Functional foods; Grazing; Milk quality.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000200103

A conceptual model to describe heat stress in dairy cows from actual to questionable loops
Provedor de dados: 109
Autores: Molina Benavides,Raúl Andrés; Sánchez Guerrero,Hugo; Atzori,Alberto Stanislao.
Abstract Thermal environment is recognized to be one the most important ecological factor to determine domestic animal growth, development and productivity for direct and indirect effects on its physiology and behavior. Despite having specific and individual adaptation, is very common, within seasonal or diurnal temperature variations, animals deal with situations outside their thermal comfort zone. Due to heat stress, dairy cows reduce milk production and fertility, and therefore, had achieved an increasing in metabolic disorders incidence, causing low revenues to farm in short and medium periods. Due to world climate change more impact of the meteorological variables on animal responses is expected for the future. This study aimed to describe and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Climate change; Grazing; Livestock production systems; Milk production; System dynamics; Temperature.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100059

Conservation of species-rich subtropical grasslands: traditional management vs. legal conservation requirements in primary and secondary grasslands
Provedor de dados: 39
Autores: Torchelsen,Fábio Piccin; Cordero,Rodrigo León; Overbeck,Gerhard Ernst.
ABSTRACT Land-use change is the main cause of biodiversity losses, and for grasslands includes changes in management. The last 10 years has seen afforestation of traditionally grazed grasslands increase considerably in the understudied Serra do Sudeste region of the Brazilian Pampa, turning the region into a mosaic of tree plantations, natural ecosystems (partly in conservation areas without grazing management) and other land uses. We evaluated grassland plant community structure and composition in conservation areas considering two distinct types of land-use history and compared them to grasslands under traditional management. The study was carried out at 58 sites. Per site, three plots were established to sample the plant composition of the herbaceous...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Conservation; Grazing; Pampa; Primary grassland; Secondary grassland; Species richness; Subtropical grasslands; Vegetation management.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000200342

Spatial variability of soil physical-hydric attributes under bovine trampling in agreste of Pernambuco State, Brazil
Provedor de dados: 1
Autores: Batista, Pedro Henrique Dias; Almeida, Gledson Luiz Pontes de; Pandorfi, Héliton; Tavares, Uilka Elisa; Melo, Airon Aparecido Silva de; Guiselini, Cristiane.
Soils under pastures suffer physical modifications, in greater or lesser intensity, via the action of animal trampling. Thus, the aim was to evaluate the spatial dependence of soil physical attributes under bovine trampling. The trial was performed at Roçadinho Farm, Agreste of Pernambuco, Brazil, in a 40 x 40 m paddock that was managed with continuous stocking by bovines and 12 AU ha-1 stocking rate. Soil samples were collected before and after grazing using a 6 x 6 m grid, totaling 36 sampling points. At each point, the bulk density, total porosity, moisture, soil penetration resistance at 0.00 - 0.10, 0.10 - 0.20, and 0.20 - 0.30 m depth were estimated, as was the hydraulic conductivity on the saturated soil surface. Descriptive statistics and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Compaction soil; Geostatistic; Girolando; Grazing; Ordinary kriging.; Engenharia Agrícola.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39594

Spatial variability of soil physical-hydric attributes under bovine trampling in agreste of Pernambuco State, Brazil
Provedor de dados: 1
Autores: Batista, Pedro Henrique Dias; Almeida, Gledson Luiz Pontes de; Pandorfi, Héliton; Tavares, Uilka Elisa; Melo, Airon Aparecido Silva de; Guiselini, Cristiane.
Soils under pastures suffer physical modifications, in greater or lesser intensity, via the action of animal trampling. Thus, the aim was to evaluate the spatial dependence of soil physical attributes under bovine trampling. The trial was performed at Roçadinho Farm, Agreste of Pernambuco, Brazil, in a 40 x 40 m paddock that was managed with continuous stocking by bovines and 12 AU ha-1 stocking rate. Soil samples were collected before and after grazing using a 6 x 6 m grid, totaling 36 sampling points. At each point, the bulk density, total porosity, moisture, soil penetration resistance at 0.00 - 0.10, 0.10 - 0.20, and 0.20 - 0.30 m depth were estimated, as was the hydraulic conductivity on the saturated soil surface. Descriptive statistics and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.03.00.00-8 compaction soil; Geostatistic; Girolando; Grazing; Ordinary kriging. Engenharia Agrícola.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39594

Número de perfilhos do capim-braquiária em regime de lotação contínua - doi: 10.4025/actascianimsci.v33i1.10440
Provedor de dados: 2
Autores: Santos, Manoel Eduardo Rozalino; Universidade Federal do Vale do São Francisco; Gomes, Virgilio Mesquita; Universidade Federal de Viçosa; Fonseca, Dilermando Miranda da; Universidade Federal de Viçosa; Albino, Ronan Lopes; Universidade Federal de Viçosa; Silva, Simone Pedro da; Universidade Federal de Viçosa; Santos, Andreza Luzia; Universidade Federal de Viçosa.
Objetivou-se identificar, pela avaliação do perfilhamento, as estratégias adequadas de manejo da Brachiaria decumbens cv. Basilisk em lotação contínua com bovinos. Foram estudadas duas estratégias de manejo: pasto com 25 cm de altura durante todo período experimental, e pasto com 15 cm no inverno e 25 cm na primavera e verão. Foram adotados o esquema de parcelas subdivididas e o delineamento em blocos casualizados com quatro repetições. As estratégias de manejo foram o fator primário e as estações (inverno, primavera e verão), o fator secundário. O menor balanço entre taxas de aparecimento (TApP) e de mortalidade de perfilhos (TMoP) e o menor número de perfilho vegetativo ocorreram no inverno. Na primavera e verão, o balanço e o número de perfilhos...
Tipo: Pesquisa Científica
Palavras-chave: 5.04.04.00-8 altura do pasto; Brachiaria decumbens; Estação do ano; Manejo sazonal; Pastejo sward height; Brachiaria decumbens; Season; Seasonal management; Grazing.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10440

Ofertas de forragem para novilhas nelore suplementadas no período de seca e transição seca/águas - doi: 10.4025/actascianimsci.v33i1.9112
Provedor de dados: 2
Autores: Schio, Alex Resende; Universidade Estadual do Sudoeste da Bahia; Veloso, Cristina Mattos; UFV; Silva, Fabiano Ferreira; Universidade Estadual do Sudoeste da Bahia; Ítavo, Luís Carlos Vinhas; Universidade Católica Dom Bosco; Mateus, Rodrigo Gonçalves; Universidade Estadual do Sudoeste da Bahia; Silva, Robério Rodrigues; Universidade Estadual do Sudoeste da Bahia.
Objetivou-se avaliar o desempenho, o consumo e o coeficiente de digestibilidade na dieta de novilhas Nelore na fase de recria suplementada em pastejo durante a seca e transição seca/águas, sob ofertas de forragem. Foram utilizadas 84 novilhas, com aproximadamente 146 &amp;plusmn; 21,37 kg de peso corporal (PC) médio, dividas em três tratamentos de acordo com as ofertas de forragem de 5, 10 e 20% do peso corporal. Os animais foram suplementados com 0,25% do PC utilizado-se o delineamento inteiramente casualizado. Os dados foram submetidos à análise de variância considerando 5% de probabilidade. Houve diferença para a disponibilidade de forragem na primeira coleta, quarta coleta e quinta coleta  (p &lt; 0,05). A utilização de ofertas variando de 5 a 20% não...
Tipo: Pesquisa de campo e análise laboratorial.
Palavras-chave: Zootecnia  Bovinocultura. Forragem; Ganho de peso; Pastejo; Recria Produção Animal. Forage; Weight gain; Grazing; Growing phase.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/9112

Correlation between performance and ingestive behavior of steers post-weaned on pastures
Provedor de dados: 2
Autores: Dias, Daniel Lucas Santos; Universidade Estadual do Sudoeste da Bahia; Silva, Robério Rodrigues; Universidade Estadual do Sudoeste da Bahia; Silva, Fabiano Fereira da; Universidade Estadual do Sudoeste da Bahia; Carvalho, Gleidson Giordano Pinto de; Universidade Federal da Bahia; Barroso, Daniele Soares; Universidade Estadual do Sudoeste da Bahia; Carvalho, Venicio Macedo; Universidade Estadual do Sudoeste da Bahia.
The objective of this study was to evaluate the correlations existing between nutrient intake and ingestive behavior of crossbred steers in the post-weaning phase on Brachiaria brizantha cv. Marandu, during the rainy period. Twenty-two steers were distributed into a completely randomized design, with two types of supplement and eleven replications, managed under rotational grazing, in a 6.5 ha area. Pearson’s Linear Correlation analysis was performed between the behavior variables and the performance variables values. The correlation coefficients were tested by the t test. The average daily gain (ADG) showed positive correlation with the times spent ruminating and eating at the trough and total chewing time. Positive correlation was observed between the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.05.00-4 bite; Cattle; Gain; Grazing.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/21501

Ingestive behavior of crossbred heifers in four seasons related to the structure of stargrass pasture
Provedor de dados: 2
Autores: Campana, Ludmila Lacerda; Modesto, Elisa Cristina; Barros, Ana Carolina Carvalho de; Zanella, Pablo Gilliardi; Carvalho, Carlos Augusto Brandão de; Camargo Filho, Sérgio Traballi.
The ingestive behavior of crossbred heifers grazing on stargrass pasture was managed at two levels of light interception and two levels of post-grazing residual height. The experiment was conducted at Pesagro (Seropédica, Rio de Janeiro State) between April 2012 and January 2013. The grazing (GT), rumination (RT) and idling (IT) times were evaluated every 10 minutes throughout a 24-hour period. Forage samples were collected for the analysis of chemical composition and for leaf:stem ratio determination. Dry bulb, wet bulb and black globe temperatures were evaluated every hour along with the relative humidity, during grazing to characterize the environment and calculate the Black Globe Humidity Index (BGHI). The mean grazing time (6 hours) was inversely...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: BGHI; Cynodon nlemfuensis; Grazing; Idling; Morphological composition; Rumination.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/24787

Comportamento ingestivo de cordeiros em terminação a pasto - DOI: 10.4025/actascianimsci.v31i3.5345
Provedor de dados: 2
Autores: Piazzetta, Hugo von Linsingen; UFPR; Monteiro, Alda Lúcia Gomes; UFPR; Ribeiro, Ticiany Maria Dias; UNESP-Botucatu; Carvalho, Paulo Cesar de Faccio; UFRGS; Dittrich, João Ricardo; UFPR; Silva, Claudio José Araujo da; UFPR.
Este trabalho objetivou avaliar o comportamento ingestivo e o consumo de forragem de cordeiros em sistemas de terminação a pasto. Os tratamentos foram: cordeiros mantidos junto às ovelhas em pastagem de azevém sem suplementação; cordeiros mantidos junto às ovelhas na mesma pastagem, suplementados em creep feeding; cordeiros mantidos junto às ovelhas na mesma pastagem, suplementados em creep grazing com trevo branco. Foram realizadas três avaliações do comportamento ingestivo, verificando-se as atividades realizadas pelos animais (pastejo, ruminação, amamentação e outras atividades). Houve diferença (p &lt; 0,05) no tempo destinado ao pastejo, à ruminação e a outras atividades, e os cordeiros não-suplementados tiveram maiores tempos de pastejo e ruminação e...
Tipo: Pesquisa de campo
Palavras-chave: 5.04.03.00-1 amamentação; Creep feeding; Creep grazing; Ovinos; Pastejo; Ruminação Nutrição e Alimentação Animal creep feeding; Creep grazing; Grazing; Ruminating; Sheep; Suckling.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/5345

Características estruturais de pastos de Brachiaria decumbens diferidos por 140 dias e estratégias de adubação nitrogenada - doi: 10.4025/actascianimsci.v33i4.10212
Provedor de dados: 2
Autores: Teixeira, Fábio Andrade; UESB; Bonomo, Paulo; UESB; Pires, Aureliano José Vieira; UESB; Silva, Fabiano Ferreira; UESB; Martins, Giselle Caroline Fernandes; UESB; Cardoso, Elisângela Oliveira; UESB.
O objetivo deste trabalho foi avaliar as características estruturais de pastos de Brachiaria decumbens diferidos por 140 dias, visando determinar a estratégia mais adequada de adubação nitrogenada. Foram estudadas quatro estratégias de adubação no início e no final do verão (0-0, 100-0, 50-50, 0-100 kg ha-1 de N), respectivamente, com quatro repetições. Para avaliação das densidades volumétricas, a forragem foi colhida em três estratos: estrato A- acima de 40 cm; B- 20-40 cm; e C- 0-20 cm do solo. O índice de tombamento foi menor (p &lt; 0,05) para a estratégia de adubação com 100 kg ha-1 de N aplicados no final do verão. No estrato B foram observadas maiores (p &lt; 0,05) densidades de forragem total, de lâmina foliar e de colmo verde para estratégia de...
Tipo: Pesquisa de campo
Palavras-chave: Forragicultura e pastagens acamamento; Densidade; Diferimento; Pastagem; Perfilho; Ureia falling; Density; Deferment; Grazing; Tiller; Urea.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10212

Requirement of energy and protein of beef cattle on tropical pasture - doi: 10.4025/actascianimsci.v35i4.21143
Provedor de dados: 2
Autores: Valente, Eriton Egidio Lisboa; Universidade Estadual do Oeste do Paraná; Paulino, Mário Fonseca; Universidade Federal de Viçosa; Detmann, Edenio; Universidade Federal de Viçosa; Valadares Filho, Sebastião de Campos; Universidade Federal de Viçosa; Cardenas, Javier Enrique Garces; Universidade Federal de Viçosa; Dias, Isabela Fernanda Teixeira; Universidade Federal de Viçosa.
Protein and energy requirements of beef cattle, aged between 4 and 18 months old, on tropical pastures, were estimated. Forty-six Nellore calves (138.3 ± 3.4 kg BW and 90-150 days old), kept on pasture, were distributed in a maintenance group (restricted feeding) or in nutritional plans, receiving a supplements with different amounts of protein and carbohydrate or non-supplemented. The net energy requirement for weight gain (NEg) was obtained by linear regression of logarithm of retained energy as a function of logarithm of empty body weight gain. The net energy requirement for maintenance (NEm) was estimated by the exponential relation between heat production and metabolizable energy intake. Net protein requirement for weight gain (RP) was estimated by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.03.01-0 grazing; Nellore; Supplementation Beef cattle; Grazing; Nellore; Supplementation.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/21143

Tiller population density in deferred Urochroa decumbens pasture and strategies for nitrogen fertilization - doi: 10.4025/actascianimsci.v35i1.10243
Provedor de dados: 2
Autores: Teixeira, Fábio Andrade; Universidade Estadual do Sudoeste da Bahia; Bonomo, Paulo; Universidade Estadual do Sudoeste da Bahia; Pires, Aureliano José Vieira; Universidade Estadual do Sudoeste da Bahia; Silva, Fabiano Ferreira; Universidade Estadual do Sudoeste da Bahia; Abreu Filho, George; Universidade Estadual do Sudoeste da Bahia; Viana, Pablo Teixeira; Universidade Estadual do Sudoeste da Bahia.
The objective of this work was to evaluate the tiller population density in Urochroa decumbens pasture deferred for 95 and 140 days, aiming to determine the best strategy for nitrogen fertilization. Four fertilization strategies at the beginning and end of summer (0-0, 100-0, 50-50, 0-100 kg  ha-1 of N) were studied, respectively, with four repetitions. For the pastures deferred for 95 days, the population densities of vegetative tillers were greater (p &amp;lt; 0.05) for the strategy 0-100. At the end of the deferment period, the weight of the vegetative tillers per hectare was greater for the strategy 0-100, followed by the strategy 50-50. The densities of vegetative tillers, evaluated in the pastures deferred for 140 days, were greater (p &amp;lt; 0.05)...
Tipo: Pesquisa de campo
Palavras-chave: Density; Deferment; Grazing; Tiller; Urea.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10243

Morphogenesis in pastures with Tanzania grass fertilized with nitrogen doses under a grazing system
Provedor de dados: 2
Autores: Soares Filho, Cecilio Viega; Cecato, Ulysses; Ribeiro, Ossival Lolato; Roma, Claudio Fabrício da Cruz; Beloni, Tatiane.
The morphogenetic and structural characteristics, coupled to forage production of Tanzania grass with nitrogen (N) doses during the seasons of the year, at intermittent grazing, were analyzed. The experimental design consisted of a totally randomized block with split plots and four replications. The plots comprised 0, 150, 300 and 450 kg ha-1 N levels, whereas the sub-plots were the seasons. Urea was applied three times on the pasture and had a positive effect on the rates of leaf elongation and emergence and on the number of live leaves of Tanzania grass in the spring and summer. High nitrogen fertilization associated with shorter grazing intervals triggered a higher percentage of leaf blades in the management of Tanzania grass under rotational stocking...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.04.00-8 Panicum maximum; Grazing; Leaf appearance rate; Leaf elongation rate; Urea.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/27101

Defoliation patterns in signal grass tillers with varying heights in the same pasture  - doi: 10.4025/actascianimsci.v35i3.14376
Provedor de dados: 2
Autores: Santos, Manoel Eduardo Rozalino; Universidade Federal de Uberlandia; Fonseca, Dilermando Miranda da; Universidade Federal de Viçosa; Silva, Guilherme Porte; Universidade Federal de Viçosa; Braz, Thiago Gomes dos Santos; Universidade Federal de Viçosa; Gomes, Virgilio Mesquita; Universidade Federal de Viçosa; Silva, Simone Pedro da; Universidade Estadual Paulista “Júlio de Mesquita Filho".
The experiment was carried out to evaluate the patterns of defoliation in plants of various heights in the same pasture of Brachiaria decumbens cv. Basilisk under continuous stocking with cattle. Four plant heights were evaluated (10, 20, 30 and 40 cm) in the same managed sward, with mean height equal to 25 cm. A randomized blocks design was used, with two replications. Defoliation frequency increased linearly along with plant height in the same pasture. Defoliation intensity, number of defoliations in leaf blade and percentage of leaf blade grazed per tiller also increased linearly along with plant height. The defoliation interval decreased linearly according to plant height. The quadratic model was adequately fitted into grazing efficiency data, reaching...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.04.00-8 Brachiaria decumbens; Forage losses; Grazing; Horizontal pasture sward.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/14376

Body composition and deposition efficiency of protein and energy in grazing young bulls
Provedor de dados: 2
Autores: Valente, Eriton Egidio Lisboa; Universidade Estadual do Oeste do Paraná; Paulino, Mário Fonseca; Universidade Federal de Viçosa; Marcondes, Marcos Inácio; Universidade Federal de Viçosa; Dias, Isabela Fernanda Teixeira; Universidade Federal de Viçosa.
The effects of supplementation with different protein: carbohydrate ratios on body composition, carcass characteristics and protein and energy deposition efficiency of young were assessed. Twenty-four Nellorecalves (132.5 ± 5.5 kgand 90-150 days of age) were kept on pasture for a 430 day experimental period. The treatments were: Control = mineral mixture only; HPHC = high-protein and high-carbohydrate supplement; HPLC = high-protein and low-carbohydrate supplement; LPHC = low-protein and high-carbohydrate supplement; LPLC = low-protein and low-carbohydrate supplement. Four animals at begning and 20 animal at end of experiment were slaughtered to evaluate the carcass composition. Control bulls had the lowest (p &amp;lt; 0.05) intake of ME (9.8 Mcal day-1)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.03.00-1 associative effects; Beef cattle; Calf; Grazing; Multiple supplement; Production.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/21345

Dynamics of Tifton 85 pasture (Cynodon dactylon L. Pers) over seeded with cool season species, under continuous grazing
Provedor de dados: 2
Autores: Silva, Viviane Santos da; Bronadani, Ivan Luiz; Alves Filho, Dari Celestino; Paula, Perla Cordeiro de; Martini, Ana Paula Machado; Moura, Amanda Farias de.
 This study aimed to evaluate the effects of oat or ryegrass over seeding on the productive characteristics and morphological composition of Tifton85 grass under continuous grazing. The three studied treatments were: Oat + Tifton85, Ryegrass + Tifton85 and Tifton85, distributed in a completely randomized design, constituting four replications of area per treatment. The Ryegrass + Tifton85 treatment presented a forage mass 27% superior to the Oat + Tifton85 treatment. The leaf percentage of Tifton85 was superior for the treatment Oat + Tifton85 (41%), while the percentage of stem + sheath was superior in the treatment Ryegrass + Tifton85 (64%). There was a higher percentage of Tifton85 leaves in the treatment Oat + Tifton85, while the Ryegrass + Tifton85...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zootecnia e Recursos Pesqueiros. forage; Grazing; Oat; Ryegrass; Tropical pasture.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/36363

Pasture height at the beginning of deferment as a determinant of signal grass structure and potential selectivity by cattle - doi: 10.4025/actascianimsci.v35i4.20421
Provedor de dados: 2
Autores: Santos, Manoel Eduardo Rozalino; Universidade Federal de Uberlândia; Silveira, Márcia Cristina Teixeira; Empresa Brasileira de Pesquisa Agropecuária; Gomes, Virgílio Mesquita; Universidade Estadual de Montes Claros; Fonseca, Dilermando Miranda da; Universidade Federal de Viçosa; Sousa, Braulio Maia de Lana; Universidade Federal de Sergipe; Santos, Anselmo de Deus; Universidade Federal de Viçosa.
Current experiment identified the height of signal grass {Urochloa decumbens (Stapf) R. D. Webster cv. Basilisk [syn. Brachiaria decumbens Stapf cv. Basilisk]} at the beginning of deferment that provided an appropriate pasture structure and potential selectivity by cattle on deferred pastures. Four pasture heights at the beginning of deferment (10, 20, 30 and 40 cm) and two forage samples (available on pasture and simulated grazing) were studied. The experimental design was set in completely randomized blocks, with two replications, in a split-plot arrangement. Higher percentage of live leaf blades and lower percentage of live stems and senescent forage were recorded in the forage sample from simulated grazing. The increase in pasture height increased the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria decumbens; Stem; Leaf; Senescent forage; Grazing Brachiaria decumbens; Stem; Leaf; Senescent forage; Grazing.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/20421

Comportamento ingestivo de cordeiros em três sistemas de produção em pastagem de Tifton 85 - DOI: 10.4025/actascianimsci.v31i3.6014
Provedor de dados: 2
Autores: Poli, César Henrique Espírito Candal; UFRGS; Lúcia Monteiro, Alda Gomes; UFPR; Barros, Carina Simionato de; UFPR; Dittrich, João Ricardo; UFPR; Fernandes, Sergio Rodrigo; UFPR; Carvalho, Paulo César de Faccio; UFRGS.
O objetivo deste estudo foi avaliar o comportamento ingestivo de cordeiros em pastagem de Tifton-85 (Cynodon spp.) em três sistemas de produção: cordeiros desmamados aos 60 dias de idade e mantidos em pastagem; cordeiros mantidos com suas mães em pastagem; e cordeiros mantidos com suas mães em pastagem e suplementados em creep feeding. O delineamento foi em blocos ao acaso com três repetições, utilizando quatro cordeiros-teste por repetição. Na pastagem, avaliou-se a altura, a massa, a composição morfológica e bromatológica da forragem. Na avaliação do comportamento ingestivo registrou-se, do nascer ao pôr do sol, o tempo despendido nas atividades de pastejo, ruminação, ócio, amamentação e alimentação no creep feeding. Avaliou-se, também, a taxa de bocados...
Palavras-chave: Creep feeding; Desmame; Pastejo; Ruminação; Taxa de bocado; Cynodon spp 5.04.05.01-2 creep feeding; Weaning; Grazing; Rumination; Bite rate; Cynodon spp.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/6014

Estratégias de suplementação para antecipação da idade à puberdade para novilhas de corte em pastagem tropical - DOI: 10.4025/actascianimsci.v30i4.1372
Provedor de dados: 2
Autores: Figueiredo, Darcilene Maria de; Programa de Pós-graduação em Zootecnia, Universidade Federal de Viçosa, Viçosa-MG; Paulino, Mário Fonseca; Programa de Pós-graduação em Zootecnia, Universidade Federal de Viçosa, Viçosa-MG; Detmann, Edenio; Programa de Pós-graduação em Zootecnia, Universidade Federal de Viçosa, Viçosa-MG; Souza, Marcos Gonçalves de; Programa de Pós-Graduação, Universidade Estadual Paulista, Jaboticabal-SP; Couto, Victor Rezende Moreira; Programa de Pós-graduação em Zootecnia, Universidade Federal de Viçosa, Viçosa-MG; Sales, Maykel Franklin Lima; Programa de Pós-graduação em Zootecnia, Universidade Federal de Viçosa, Viçosa-MG.
Objetivou-se avaliar suplementos formulados com diferentes fontes de proteína, no período das águas, sobre o desempenho produtivo de novilhas de corte em recria. Para avaliar o desempenho produtivo, 20 novilhas mestiças Holandês x Zebu e aneloradas, com peso corporal médio de 234 kg e idade aproximada de 14 meses, foram distribuídas em cinco piquetes de B. decumbens Stapf de 2,5 ha cada, em delineamento inteiramente casualizado, com cinco tratamentos e quatro repetições. Os suplementos foram à base de farelo de soja (FS), farelo de algodão 38% PB (FA38), farelo de glúten de milho 60% PB (GM) e farelo de trigo + ureia (FT), além de um tratamento-testemunha, constituído apenas de mistura mineral (MM). A quantidade diária de suplemento foi fixada para...
Tipo: Pesquisa de campo; análise laboratorial
Palavras-chave: 5.04.03.00-1 Nutrição e Alimentação Animal desempenho; Fêmeas; Pastejo; Suplementação. Nutrição e Alimentação Animal performance; Females; Grazing; Supplementation.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/1372

Floristic and structural patterns in South Brazilian coastal grasslands
Provedor de dados: 42
Autores: MENEZES,LUCIANA S.; MÜLLER,SANDRA C.; OVERBECK,GERHARD E.
ABSTRACT The natural vegetation of Southern Brazil's coastal region includes grasslands formations that are poorly considered in conservation policy, due to the lack of knowledge about these systems. This study reports results from a regional-scale survey of coastal grasslands vegetation along a 536 km gradient on southern Brazil. We sampled 16 sites along the coastal plain with 15 plots (1 m²) per site. All sites were grazed by cattle. We estimated plant species cover, vegetation height, percentage of bare soil, litter and manure, and classified species according to their growth forms. We found 221 species, 14 of them exotic and two threatened. The prostate grasses: Axonopus aff.affinis, Paspalum notatum and P. pumilumwere among the most important...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pampa biome; Campos; Conservation; Grazing; Sandy soil.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502081

Corn silage supplementation for dairy cows grazing annual ryegrass at two pasture allowances
Provedor de dados: 45
Autores: Miguel,M.F.; Delagarde,R.; Ribeiro-Filho,H.M.N.
ABSTRACT Corn silage supplementation for dairy cows grazing in temperate annual pastures has rarely been investigated. The aim of this study is to compare two supplementation levels (0 and 4kg dry matter [DM]/day of a 7:1 mixture of corn silage and soybean meal) in dairy cows strip-grazing annual ryegrass (Lolium multiflorum Lam.) at two pasture allowances (PA, low= 25 and high = 40kg DM/d at ground level). The study was carried out according to an incomplete 4 × 3 Latin square design, using 12 cows and three experimental periods of 12 days. The green leaves allowances were only 4.9 and 8.5kg DM/d at the low and high PA, respectively. The total DM intake and milk production increased in supplemented cows compared to un-supplemented cows at the low PA, but...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dairy cow; Corn silage; Grazing; Pasture allowance; Supplementation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000301037

Agriculture and livestock impacts on river floodplain wetlands: a study case from the lower Uruguay river
Provedor de dados: 51
Autores: Bena,María Julia; Sirolli,Horacio; Kalesnik,Fabio.
Even though wetlands are very valuable environments, they suffer heavy exploitation and transformation processes that affect their biodiversity. The main goal of this study was to characterize the herbaceous plant communities associated with the southern Uruguay River flood plain. We focused on lowlands of two farms, one of which is surrounded by an embankment to prevent flooding. A random stratified sampling was performed in 72 plots. To detect distribution patterns and plant species associations we performed a Detrended Correspondence Analysis (DCA) and a Two-Way indicator species analysis (TWINSPAN). We could identify six groups of plots whose ordination patterns are related to the flooding preferences of dominant species. Herbaceous plant groups that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Uruguay river; Dyking; Grazing; Herbaceous communities; Floodable lowlands.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722016000200010

Protozoans bacterivory in a subtropical environment during a dry/cold and a rainy/warm season
Provedor de dados: 58
Autores: Hisatugo,Karina F.; Mansano,Adrislaine S.; Seleghim,Mirna H.R.
In aquatic ecosystems, bacteria are controlled by several organisms in the food chain, such as protozoa, that use them as food source. This study aimed to quantify the ingestion and clearance rates of bacteria by ciliates and heterotrophic nanoflagellates (HNF) in a subtropical freshwater reservoir (Monjolinho reservoir -São Carlos -Brazil) during one year period, in order to verify their importance as consumers and controllers of bacteria in two seasons, a dry/cold and a rainy/warm one. For this purpose, in situ bacterivory experiments were carried out bimonthly using fluorescently labeled bacteria with 5-(4,6 diclorotriazin-2yl) aminofluorescein (DTAF). Although ciliates have shown the highest individual ingestion and clearance rates, bacterivory was...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Bacteria; Grazing; Ciliates; Nanoflagellates; Microbial food web.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100020

Grazing of particle-associated bacteria-an elimination of the non-viable fraction
Provedor de dados: 58
Autores: Gonsalves,Maria-Judith; Fernandes,Sheryl Oliveira; Priya,Madasamy Lakshmi; LokaBharathi,Ponnapakkam Adikesavan.
Abstract Quantification of bacteria being grazed by microzooplankton is gaining importance since they serve as energy subsidies for higher trophic levels which consequently influence fish production. Hence, grazing pressure on viable and non-viable fraction of free and particle-associated bacteria in a tropical estuary controlled mainly by protist grazers was estimated using the seawater dilution technique. In vitro incubations over a period of 42 h showed that at the end of 24 h, growth coefficient (k) of particle-associated bacteria was 9 times higher at 0.546 than that of free forms. Further, ‘k’ value of viable cells on particles was double that of free forms at 0.016 and 0.007, respectively. While bacteria associated with particles were grazed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacteria; Ciliates; Grazing; Particle; Protists; Viable.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000100037

Nitrogen Losses under Different Cattle Grazing Frequencies and Intensities in a Volcanic Soil of Southern Chile
Provedor de dados: 117
Autores: Núñez,Pedro A.; Demanet,Rolando; Misselbrook,Tom H.; Alfaro,Marta; Mora,María de la Luz.
Chilean livestock production systems have intensified over the last years, with increasing amounts of N fertilizer inputs creating the potentiality for environmental damage through N pollution of water and air, so that alternative production strategies have been developed to reduce such environmental impacts. This study assesses N losses under different grazing frequencies and intensities on permanent pasture (Lolium perenne L., Festuca arundinacea Schreb., Dactylis glomerata L., and Trifolium repens L.) on an Andisol in Southern Chile. Four grazing strategies were evaluated: frequent-heavy (FH), frequent-light (FL), infrequent-heavy (IH), infrequent-light (IL), and a no grazing control (C) treatment, and each with three replicates in a randomized complete...
Tipo: Journal article
Palavras-chave: Ammonium; Grazing; Leaching; Nitrate; NH3 volatilization.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200007

Nitrogen, Phosphorus and Potassium Losses in a Grazing System with Different Stocking Rates in a Volcanic Soil
Provedor de dados: 117
Autores: Alfaro,Marta; Salazar,Francisco; Iraira,Sergio; Teuber,Nolberto; Villarroel,Dagoberto; Ramírez,Luis.
In Chile there is little information on nutrient losses in livestock systems. The experiment was carried out between 2004 and 2006. Two stocking rates (3.5 and 5.0 steers ha-1) were tested under rotational grazing with Black and White Friesian steers on a permanent pasture (67.5 kg N and 40 kg P ha-1 yr-1). To quantify surface runoff losses (N, P, K), three surface lysimeters (5 x 5 m) per treatment were established. N and K leaching losses were estimated with ceramic cups. Runoff and leachate samples were individually analyzed for available and total N, reactive (RP) and total P, and K. Dissolved organic N (DON) and organic P (OP) were estimated as the difference between total and available forms. The stocking rate did not increase total N, P and K losses...
Tipo: Journal article
Palavras-chave: Eutrofication; Water quality; Grazing; Andisol; Beef production.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000200004

Behavior of grazing European wild boar (Sus scrofa) in a semi-extensive production system
Provedor de dados: 118
Autores: Hodgkinson,Suzanne M; Matus,Felipe; Lopez,Ignacio F.
In the semi-extensive farming systems that are used to raise European wild boar in countries such as Chile, the behavior of the animals in paddocks has not been studied and is important for managing the system. The objective of the present study was to determine the proportion of time that grazing wild boar spent on different activities and the distribution of these activities during the day. The study was conducted in paddocks containing Cynodon dactylon, Lolium perenne and Poa pratensis. A total of 35 purebred European wild boars with a liveweight (average + SEM) of 37.4 + 1.11 kg with noserings were used in the study. The animals were in the paddocks from 08:30 h until 16:30 h, after which they had free access to a commercial diet for one hour and were...
Tipo: Journal article
Palavras-chave: Behavior observations; Behavior patterns; European wild boar; Grazing.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100017

Ingestive behavior of steers on pastures of Brachiaria brizantha and Cynodon dactylon
Provedor de dados: 118
Autores: Zanine,Anderson de M; Vieira,Bruno R; Ferreira,Daniele de J; Vieira,Antônio J. M; Silveira,Márcia C. T. da; Siva,Wilton L. da; Cecon,Paulo R.
An experiment was carried out to assess the performance of steers on Brachiaria brizantha and Cynodon dactylon cv. Coast cross pastures by the continuous stocking method with a variable stocking rate. A completely randomized experimental design was used with two pastures representing the treatments, each containing 10 replicates. The results of t-tests demonstrated that the steers grazed for less time (7:19 h) on the B. brizantha grass pasture than the on Coast-cross grass pasture (8:13 h). There was no difference in rumination time from 6:46 and 6:89 h for the B. brizantha and Coast-cross pastures, respectively. There was a significant difference for the values regarding the time that the steers remained idle, and the animals were more frequently idle on...
Tipo: Journal article
Palavras-chave: Cattle; Ethology; Grazing; Idleness.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000200012

Effect of feeding and housing systems on rumen properties and plasma metabolite stress indicators in autochthonous Spanish Ojalada sheep
Provedor de dados: 118
Autores: Miguel,José A; Calvo,José L; Ciria,Jesús; Asenjo,Begoña.
To rear lambs of the Ojalada breed, fed exclusively on mothers' milk until 5 weeks, three feeding systems were compared: a) ewes kept indoors and fed chopped straw plus concentrate (IND+CH+C), total mixed ration (TMR); b) ewes kept indoors and fed whole straw in the form of large bales plus concentrate (IND+W+C), TMR; and c) free-range grazing plus concentrate (GR+C; control group). Parameters related to ruminal fermentation (pH, NH3-N concentration and proportion of volatile fatty acids (VFAs)) in 40 sheep during a production cycle were monitored. The plasma concentrations of stress-related metabolites (i.e., glucose, lactate, phosphate, creatine kinase (CK), cortisol and non-esterified fatty acids (NEFAs)) during a production cycle and in 10 sheep during...
Tipo: Journal article
Palavras-chave: Barley straw; Ewe; Grazing; Local Spanish breed.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000100007

Seasonal and annual changes in the quality of native rangeland selected by grazing steers in northern Mexico
Provedor de dados: 118
Autores: Reyes,Osvaldo; Murillo,Manuel; Herrera,Esperanza; Carrete,Francisco O.
The objective of this study was to determine and compare seasonally the chemical composition, in vitro gas production, in situ degradability and ruminal fermentation of the diet selected by cattle grazing on native rangeland over two years. Diet samples were collected from four esophageal fistulated steers (350 ± 3 kg BW), and four ruminally fistulated steers (342 ± 1.5 kg BW) were used to evaluate degradation and ruminal fermentation. Data were analyzed using a repeated measurements design. The crude protein (CP), in vitro dry matter digestibility (IVDMD) and metabolizable energy (ME) were higher in 2008 (P&amp;#8804;0.01) and in the summer (P&amp;#8804;0.05). The volatile fatty acids (VFA) and propionate concentrations were affected by season and year...
Tipo: Journal article
Palavras-chave: Cattle; Grazing; In vitro gas production; In situ degradation; Ruminal fermentation.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000200003

Behavioral aspects of Santa Inês sheep kept in pasture in a tropical rainforest climate
Provedor de dados: 65
Autores: Manno,Maria Cristina; Rodrigues,Luiz Fernando de Souza; Lima,Kedson Raul de Souza; Carvalhal,Monique Valéria de Lima; Rodrigues Filho,Silas Santiago; Costa,Gleyce Lopes da; Monteiro,Ailime Nayara Gomes; Barreto,Andrea do Nascimento.
ABSTRACT:  This study aimed to evaluate behavioral aspects of Santa Inês sheep in pasture in humid tropical climate. In order to do so, nine Santa Inês sheep were kept on pasture, exposed to the climate directly, without shade, for 24 days, with 12 alternate days in each period (dry and raining) in 2015. The behavioral parameters evaluated were: food consumption, standing idleness, lying idle and rumination. Observations occurred from 08:00 A.M. to 05:55 P.M. The experimental was a completely randomized design (CRD) with two treatments (rainy season and dry period), nine replications, one animal per experimental unit. To understand the correlations of the behavioral parameters with the climatic variables, Pearson’s correlation was performed. Approximate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dry season; Raining season; Grazing.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000100651

Vegetation composition and forage mass in grassland with a double structure under two winter grazing regimes
Provedor de dados: 65
Autores: Coelho,André Alfredo; Trindade,José Pedro Pereira; Volk,Leandro Bochi da Silva; Pinheiro,Clodoaldo Leites; Quadros,Fernando Luiz Ferreira de.
ABSTRACT:  Remnant areas of Pampas grassland have a distinct double structure. Efficiency of livestock farming on these grasslands depends on practices that are synchronized with natural variation. This study examined the changes in vegetation composition and forage mass during winter to understand the effects of grazing methods in a natural pasture with a double structure that was grazed by heifers. An experimental area in the municipality of Bagé, Rio Grande do Sul, was subjected to continuous or rotational grazing treatments, with two replicates each. Frequency of the structural composition and forage mass of the lower stratum and animal weight was measured at the beginning and end of the experimental period (June 7 to October 7, 2016, respectively)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forage allowance; Grazing; Heifers; Native grassland.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000600651

Corn supplementation on milk urea nitrogen content of dairy cows grazing on temperate annual pasture
Provedor de dados: 65
Autores: Dall-Orsoletta,Aline Cristina; Almeida,João Gabriel Rossini; Oziemblowski,Márcia Maria; Ribeiro-Filho,Henrique Mendonça Nunes.
ABSTRACT: The excretion of urinary nitrogen (N), one of the most important environmental contaminants from livestock systems, is highly correlated with milk urea N content. The objective of this research was to evaluate the use of different types of corn supplementation on milk urea N in grazing dairy cows. Twelve Holstein × Jersey lactating dairy cows were divided into six uniform groups according to milk production, lactation stage and live weight. Treatments were compared according to a 3 × 3 replicated Latin square experimental design, with three periods of seventeen days (twelve days to adaptation and five to measurements). The experimental treatments were exclusively grazing (G); grazing + supplementation with 4.2 kg DM of corn silage (CS) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen excretion; Ground corn; Corn silage; Grazing.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200650

Chemical composition and fatty acid profile in meat from grazing lamb diets supplemented with ryegrass hay, fishmeal and soya bean meal as PUFA sources
Provedor de dados: 65
Autores: Romero-Bernal,Jose; Almaraz,Ernesto Morales; Ortega,Octavio Alonso Castelán; Salas,Nazario Pescador; González-Ronquillo,Manuel.
ABSTRACT: This study examined the characteristics of the fatty acids profile in the meat of lambs fed grazing and supplemented with different PUFA sources. Thirty Suffolk lambs were used (37.2±5.4kg BW), grazing on perennial ryegrass (Lolium perenne) (12h d-1) and supplemented (30g kg-1 BW0.75) with ryegrass hay (RGH), or supplements formulated with fishmeal (FHM) or soybean meal (SBM). Lambs were used in a completely randomized design. Results showed an effect on total SFA, with SBM higher than RGH (P=0.033), and SBM and FHM showing higher MUFA content compared with RGH (P=0.001). Total PUFA content was higher for RGH, followed by FHM and with the lowest content for SBM (P=0.001). Concluding that there is a variation in fatty acid content depending on the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lambs; Grazing; Fatty acids; Meat; PUFA.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000400655

Performance of holsteins cows in pasture of Cynodon dactylon cv. Coast-cross supplemented with concentrate
Provedor de dados: 64
Autores: Cardoso,Rodrigo Carvalho; Paiva,Paulo César de Aguiar; Vilela,Duarte.
The work was developed in the experimental station of Embrapa Gado de Leite (Dairy Cattle Embrapa), in Coronel Pacheco, in Zona da Mata Region of Minas Gerais, with the purpose of evaluating the productive performance of Holstein cows kept on 'Coast-cross' (Cynodon dactylon (L.) Pears) pasture, fertilized, strategically irrigated and where the cows were daily supplemented with 3 or 6 kg of concentrate/cow/day. The data were collected during three years (October/2000 to October/2003), involving 108 lactations. An experimental randomized block design with two replicate areas per treatment was adopted, with nine animals per area and eighteen animals per treatment being utilized, with fixed stocking rate of five cows/ha. The system of grazing, under rotated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrition; Intake; Grazing; Milk production; Milk quality; Reproductive performance.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000600029