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| Registros recuperados: 129 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 ± 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 < 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 |
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| Registros recuperados: 129 | |
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