SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

HOTT, M. C.; CARVALHO, L. M. T.; ANTURNES, M. A. H.; RESENDE, J. C. de; ROCHA, W. S. D. da.

Abstract: There is currently a lot of interest in determining the state of Brazilian grasslands. Governmental actions and programs have recently been implemented for grassland recovery in Brazilian states, with the aim of improving production systems and socioeconomic indicators. The aim of this study is to evaluate the vegetative growth, temporal vigor, and long-term scenarios for the grasslands in Zona da Mata, Minas Gerais State, Brazil, by integrating phenological metrics. We used metrics derived from the normalized difference vegetation index (NDVI) time series from moderate resolution imaging spectroradiometer (MODIS) data, which were analyzed in a geographic information system (GIS), using multicriteria analysis, the analytical hierarchy process,...

Avaliação de sensor multiespectral em mapeamentos da infestação de pastagens naturais pelo capim-annoni.

Palavras-chave: Time series; NDVI; Phenological metrics; Remote sensing; Degradation; Grasslands.

Ano: 2019

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118582

Biomass components of Pennisetum purpureum cv. Roxo managed at different growth ages and seasons.

NEVES, M. C.; PEREZ, N. B.; LUIZ, A. J. B.; DEIBLER, A.; PINHO, L. B. de.

Resumo: O emprego de imagens adquiridas por aeronaves remotamente pilotadas na agricultura é uma alternativa cada vez mais frequente. Este trabalho tem como objetivo avaliar o emprego de um sensor desenvolvido para estes equipamentos no mapeamento e quantificação da infestação de pastagens naturais do sul do Brasil pelo capim-annoni (Eragrostis plana Nees). Foram analisadas as correlações entre variáveis biométricas (relacionadas à biomassa e níveis de infestação em pastagens) e respostas espectrais (cinco bandas do sensor e dois índices obtidos pela composição de bandas). Várias correlações foram estatisticamente significativas e a maior delas mostrou que a reflectância na banda correspondente à borda do vermelho é inversamente proporcional ao nível de...

Tipo: Artigo em anais de congresso (ALICE)

Palavras-chave: Aeronaves remotamente pilotadas; Plantas invasoras; Banda borda do vermelho; Remotely piloted aircrafts; Invasive plant; Red edge band; Reconhecimento Aéreo; Aerofotogrametria; Pastagem; Capim Annoni; Erva Daninha; Grasslands; Invasive species; Multispectral imagery.

Ano: 2019

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1117339

MARANHÃO, T. D.; CÂNDIDO, M. J. D.; LOPES, M. N.; POMPEU, R. C. F. F.; CARNEIRO, M. S. de S.; FURTADO, R. N.; SILVA, R. R. da; SILVEIRA, F. G. A. da.

Abstract: This study was carried out aiming to evaluate the biomass components of elephant grass cv. Roxo at seven growth ages, during rainy, transition and dry seasons. A completely randomized design was adopted with a split plot arrangement over time. The treatments consisted of seven growth ages (9, 18, 27, 36, 45, 54 and 63) and three seasons (rainy, transition and dry). The variables green forage biomass, dead forage biomass, green stem biomass and green leaf blade biomass showed positive linear responses to age and had their magnitude influenced by the evaluated seasons. The live/dead material ratio showed a decreasing linear response as a function of age. The leaf blade/stem ratio showed a negative linear adjustment in the rainy season, reaching a...

Biomass Partitioning Following Defoliation of Annual and Perennial Mediterranean Grasses

Palavras-chave: Grassland management; Growth stages; Seasonality; Estacionalidade; Estrutura do dossel; Capim Roxo; Estação seca; Manejo de pastagem; Pennisetum Purpureum; Capim Elefante; Forrageira Tropical; Gramínea Forrageira; Crescimento; Caule; Biomass; Canopy; Dry season; Grasslands; Leaves; Stems; Wet season; Pasture management.

Ano: 2018

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1094388

Ecology and Society

Gutman, Mario; Agricultural Research Organization; mgutman@shani.net; Noy-Meir, Imanuel; Hebrew University of Jerusalem; noymeir@agri.huji.ac.il; Pluda, Daniel C; Volcani Center;; Seligman, No'am; Volcani Center; noamseli@netvision.net.il; Rothman, Steven; ;; Sternberg, Marcelo; Tel Aviv University; MarceloS@tauex.tau.ac.il.

A two-year experiment was conducted in northeastern Israel to study the effects of various defoliation regimes on biomass partitioning between vegetative and reproductive structures in a perennial and an annual Mediterranean grass. Greater insight into the mechanisms regulating biomass partitioning after defoliation enables ecologists and rangeland managers to interpret and predict population and community dynamics in Mediterranean grasslands more efficiently. Two typical Mediterranean grasses, Triticum dicoccoides, an annual species, and Hordeum bulbosum, a perennial species, were grown in containers in the open. They were subjected to a series of defoliation treatments that comprised three clipping frequencies and three clipping heights in a full...

Tipo: Peer-Reviewed Reports

Palavras-chave: Annual vs. perennial grasses; Biomass partitioning; Defoliation treatments; Grasslands; Grazing response; Hordeum bulbosum; Israel; Mediterranean; Reproductive effort; Triticum dicoccoides; Vegetative vs. reproductive structures..

Ano: 2001

Brazilian tropical grassland ecosystems: distribution and research advances.

GUARDA, V. D. A.; GUARDA, R. D. A..

A few decades ago we sought the understanding of the functioning of Brazilian ecosystems. During these years, changes in the way land use were influenced primarily by economic issues involving the process of valuation of land in different regions. Furthermore, developments in research have provided productive increments that were well characterized in some phases. This paper aims to trace a brief history of the distribution of grassland ecosystems in Brazil and show how it has been the advances in research on forages and pastures in the country, pointing its evolution, transition times and trends. Moreover, it purports to show a perspective of the dynamics of occupation of Brazilian territory by these ecosystems. The information is presented on three...

Cambios en la vegetacion de un campo abandonado despues de un cultivo de trigo.

Palavras-chave: Cerrado; Manejo; Pastagem; Pastejo; Ecossistema; Grazing management; Grasslands; Agroecosystems.

Ano: 2014

URL: http://www.alice.cnptia.embrapa.br/handle/doc/983390

BOCCANELLI, S. I.; PIRE, E. F.; TORRES, P. S.; LEWIS, J. P..

La vegetacion pristina de los campos altos del sur de Santa Fe (Argentina) son distintos tipos de flechillares caracterizados por la abundancia de varias especies del genero Stipa. Cuando un campo agricola se abandona suele revertir a las comunidades pristinas. El objeto de este trabajo es analizar los diez primeros anos de la sucesion secundaria de un campo sometido a agricultura durante largo tiempo que se abandono despues de un cultivo de trigo (Triticum aestivum). En el primer ano aparece trigo acompanado de malezas anuales (Chenopodium album y Portulaca oleracea); despues del primer ano una parcela fue colonizada por Baccharis salicifolia y las otras por Carduus acanthoides, Cerastium glomeratum, Ammi majus, etc. Los ultimos anos constituyen una etapa...

Características da bacia hidrográfica do Rio Ivinhema.

Palavras-chave: Pampa; Pradera; Triticum aestivum; Sucesion; Diversidad; Dinamica de la vegetacion; Grasslands; Succession; Diversity; Vegetation dynamics.

Ano: 1999

URL: http://www.alice.cnptia.embrapa.br/handle/doc/87005

POTT, A.; SILVA, J. dos S. V. da; GOMES, E. L..

Resumo: A Unidade de Planejamento e Gerenciamento (UPG) do Rio Ivinhema faz parte do Corredor Ecológico Pantanal-Serra da Bodoquena-Rio Paraná. São brevemente descritos composição municipal, rede fluvial, geologia, geomorfologia, solos, qualidade de água e vulnerabilidade ambiental, com ênfase em vegetação e uso do solo. A vegetação é de transição Cerrado-Mata Atlântica (Floresta Estacional Semidecidual) e florestas e campos inundáveis de planície de inundação. Os tipos de vegetação mais ameaçados são áreas úmidas como os buritizais (Mauritia flexuosa), não respeitados como Áreas de Preservação Permanente, as florestas, e os campos naturais, cujos escassos remanescentes também deveriam ser preservados.

Contribution of Additive and Dominance Effects on Agronomical and Nutritional Traits, and Multivariate Selection on Urochloa spp. Hybrids.

Palavras-chave: Buritizal; Campos naturais; Mata Atlântica; Bacia hidrográfica; Cerrado; Várzea; Floodplains; Grasslands; Wetlands; Mauritia.

Ano: 2014

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1001229

MATIAS, F. I.; BARRIOS, S. C. L.; BEARARI, L. M.; MEIRELES, K. G. X.; MATEUS, R. G.; AMARAL, P. N. C. do; ALVES, G. F.; VALLE, C. B. do; FRITSCHE-NETO, R..

A tropical forage breeding program contains several peculiarities, especially when it involves polyploid species and facultative apomixis. Urochloa spp. are excellent perennial forages, and the identification of superior genotypes depends on the selection of many characteristics under complex genetic control, with high cost and time-consuming evaluation. Therefore, the use of tools such as multivariate analysis and diallel analyses could contribute to improving the efficiency of breeding programs. Thus, the objectives were to estimate (i) the contribution of additive and nonadditive effects on agronomical and nutritional traits in a population of interspecific hybrids of Urochloa spp., originated from a partial diallel between five apomictic and four...

Current and future land use and land cover scenarios in the Arroio Marrecas watershed

Palavras-chave: Forrageira Tropical; Apomixia; Gramínea Perene; Controle Genético; Hibrido; Cruzamento Animal; Livestock; Grasslands; Breeding; Urochloa; Perennials; Polyploidy; Hybrids.

Ano: 2018

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1106550

AGRIAMBI

Tornquist,Carlos G.; Silva,Diego S. da.

ABSTRACT This study evaluated historic land use and land cover changes in the Arroio Marrecas watershed (Caxias do Sul, Rio Grande do Sul state of Brazil) and simulated future land use scenarios until 2034. Spatial and temporal simulations were conducted with the Conversion of Land Use and its Effects - Small Regional Extent (CLUE-S) model. Three land use scenarios were developed to include public policies and agricultural trends in the study region for 20 years (2015-2034). Geospatial analysis of different land uses showed that areas that were originally covered grasslands and forests decreased, which can be attributed to the expansion of intensive agricultural uses, such as fruit farming/forestry and urbanization. The reallocation dynamics of land use...

Effects of flooding on the spatial distribution of soil seed and spore banks of native grasslands of the Pantanal wetland

Palavras-chave: Geospatial analysis; Environmental modeling; CLUE-S; Grasslands.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000300215

Acta Botanica

Oliveira,Patricia Carla de; Torezan,José Marcelo Domingues; Cunha,Catia Nunes da.

ABSTRACTTo better understand the role that flooding plays in shaping plant communities of native floodable grasslands of the Pantanal and to characterize the spatial distribution of plants, we present the results of a survey of soil seed and spore banks using the seedling emergence method. We hypothesized that terrain subjected to the deepest and longest flooding should have higher propagule abundance and richness. The species composition and distribution of seeds and spores in the soil were assessed at five sites using three sampling positions at each according to inundation intensity. In each sample position 2cm-thick soil samples were collected in quadrats to a depth of 10cm. Litter was also collected as an independent layer. Sample monitoring in the...

Estimativa de expoentes de Hurst para séries temporais de imagens NDVI / MODIS em regiões de pastagens da Zona da Mata de Minas Gerais.

Palavras-chave: Eleocharis minima; Eleocharis plicarhachis; Flooding; Grasslands; Isoetes pedersenii; Panicum laxum; Rotala mexicana; Sagittaria guayanensis; Soil seed and spore bank; Spatial distribution.

Ano: 2015

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300400

HOTT, M. C.; CARVALHO, L. M. T. de; ANTUNES, M. A. H.; ALVES, H. M. R.; ROCHA, W. S. D. da.

The Zona da Mata region in Minas Gerais State is configured in a traditional dairy production chain, whose grasslands have subtle dynamics in their phenology, and currently there is a strong concern regarding degradation and vegetative development trends. The Hurst exponents (H) are a potential tool to describe the evolution scale of time series, sensitive to short- and long-term memory. This study was aimed at developing an algorithm in the GIS that presents reliable results of the Hurst exponents for NDVI from MODIS imagery, using binary blocks method applied to R/S analysis (range rescaled) in the Gretl, an econometrics and time series software. We produced H values identical to those estimated H for time series of pixels extracted from the satellite...

Tipo: Artigo em anais de congresso (ALICE)

Palavras-chave: Serie temporal; Hurst exponents; Expoentes de hurst; Pastagem; Grasslands; Moderate resolution imaging spectroradiometer.

Ano: 2015

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1041272

Factors influencing seed germination in Cerrado grasses

Acta Botanica

Kolb,Rosana Marta; Pilon,Natashi Aparecida Lima; Durigan,Giselda.

Few studies address the ecology of herbs of Cerrado grasslands, which are ecosystems where the long dry season, high temperatures, insolation, fire and invasive grasses greatly influencing germination and the establishment of plants. We assessed germination of 13 species of Poaceae from Cerrado grasslands under nursery conditions or in germination chambers, the latter with i) recently collected seeds and seeds after six months storage, ii) under constant and alternating temperatures, and iii) in the presence and absence of light. Germinability, mean germination time (MGT) and required light were quantified to elucidate factors involved in successful germination. Germinability was low for most grasses, probably because of low seed viability. For most...

Ferramentas para plano de manejo que visem a conservação das pastagens nativas associada com a introdução de gramíneas exóticas no Pantanal.

Palavras-chave: Conservation; Grasslands; Poaceae; Savanna; Seed storage; Seed viability.

Ano: 2016

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100087

Infoteca-e

SANTOS, S. A.; CARDOSO, E. L..

A presente publicação visa apresentar informações e ferramentas que possam subsidiar a definição de estratégias de manejo que proporcionem a conservação das pastagens nativas, associada com a introdução de gramíneas exóticas, e que permitam a manutenção da sustentabilidade dos sistemas de produção no Pantanal.

Tipo: Documentos (INFOTECA-E)

Palavras-chave: Pastagem nativa; Conservação; Pastures; Pasture grasses; Grasslands.

Ano: 2017

URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/1071787

Fitofisionomias do bioma cerrado.

RIBEIRO, J. F.; WALTER, B. M. T..

Os biomas do Brasil; O bioma cerrado; Origem das formacoes florestais; Origem das formacoes savanicas e campestres; Cerrado: definicao de termos; Trabalhos abordando terminologia fitofisionomica; Padronizacao de termos fitofisionomicos; Principais tipos fitofisionomicos do cerrado; Formacoes florestais; Mata ciliar; Mata de galeria; Mata seca; Cerradao; Formacoes savanicas; Cerrado sentido estrito; Parque do cerrado; Palmeiral; Vereda; Formacoes campestres; Campo sujo; Campo rupestre; Campo limpo; Chave de identificacao dos tipos fitofisionomicos do cerrado.

Tipo: Capítulo em livro científico (ALICE)

Palavras-chave: Cerrado; Floresta; Savana; Mata ciliar; Floresta decidua; Cerradao; Palmeira; Campo; Vereda; Terminologia; Brasil; Forests; Savannas; Riparian vegetation; Deciduous forests; Palmae; Grasslands; Terminology; Brazil.

Ano: 1998

URL: http://www.alice.cnptia.embrapa.br/handle/doc/554094

Florística e aspectos fitogeográficos dos "campos" do parque estadual do Jaraguá, São Paulo, Brasil.

BERALDO, K.; FRANÇA, V. G.; HEIDEN, G.; PIRANI, J. R..

bitstream/item/182862/1/Gustavo-Heiden-Beraldo.et.al.2018-Incluido.pdf

Genetic diversity and population structure of naturally rare Calibrachoa species with small distribution in southern Brazil

Palavras-chave: Atlantic Forest Domain; Conservation; Floristics; Savanna; Grasslands.

Ano: 2018

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1095603

Genet. Mol. Biol.

John,Ana Laura de Wallau; Mäder,Geraldo; Fregonezi,Jeferson N.; Freitas,Loreta B..

Abstract Calibrachoa is a South-American genus comprising 27 species, several considered endemic or rare; few were subjects in genetic studies. We attempted to generate new data about the phylogenetically related and rare species C. eglandulata, C. sendtneriana, C. serrulata, and C. spathulata concerning their genetic diversity and population structure, which, coupled with their known restricted distribution, could help access their conservation status and contribute to the study of the Brazilian biodiversity. We sequenced 88 individuals for plastid intergenic spacers and genotyped 186 individuals for five microsatellite loci. Compared among each other, C. sendtneriana and C. serrulata presented the highest values of genetic diversity [π% (sd) = 0.23...

Houseflies speaking for the conservation of natural areas: a broad sampling of Muscidae (Diptera) on coastal plains of the Pampa biome, Southern Brazil

Palavras-chave: Plastid DNA; Microsatellites; Threatened species; Grasslands; Herbaceous species.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000100108

Rev. Bras. entomol.

Zafalon-Silva,Ândrio; Kirst,Frederico Dutra; Krüger,Rodrigo Ferreira.

ABSTRACT The Brazilian Coastal Plain of the Pampa Biome (CPPB), has suffered fragmentation caused by resource extraction and cattle raising. In turn, conservation proposals are needed to prevent the anthropisation of Pampa natural areas. The first step towards conservation proposals by using insects is fauna inventories, providing data support for legislators. Thus, we undertook a regional and broad-scale sampling survey to investigate the diversity of Muscidae flies in protected and non-protected areas of CPPB. In addition, we carried out an ecological guild diversity analysis as a metric approach of bioindication. The Muscidae sampling resulted in 6314 specimens, 98 species taxa in 31 genera. Based on diversity estimators, our sampling represents 70-86%...

Land-Use and Land Cover Dynamics in South American Temperate Grasslands

Palavras-chave: Atlantic forest; Diptera; Ecology; Guilds; Grasslands; Muscidae.

Ano: 2018

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262018000400292

Ecology and Society

In the Río de la Plata grasslands (RPG) biogeographical region of South America, agricultural activities have undergone important changes during the last 15–18 years because of technological improvements and new national and international market conditions. We characterized changes in the landscape structure between 1985–1989 and 2002–2004 for eight pilot areas distributed across the main regional environmental gradients. These areas incorporated approximately 35% of the 7.5 × 105 km&#178 of the system. Our approach involved the generation of land-use and land cover maps, the analysis of landscape metrics, and the computation of annual transition probabilities between land cover types. All of the...

Tipo: Peer-Reviewed Reports

Palavras-chave: Campos; Fragmentation; Grasslands; Land use; Landscape dynamics pampas; Remote sensing; Spatial metrics.

Ano: 2008

Lolium multiflorum seeds in the soil: I. Soil seed bank dynamics in a no til system

Rev. bras. sementes

Maia,Fernanda Costa; Maia,Manoel de Souza; Bekker,Renée M.; Berton,Rogério Previatti; Caetano,Leandro Sebastião.

The objective of the study was to characterize annual ryegrass seed population dynamics, managed for natural re-sowing, in no til systems in rotation with soybean, in different chronosequences An area was cultivated for two years with soybean, left as fallow land for the next two years and then cultivated again with soybean for the next two years. The four chronosequences represented different management periods, two with soybean (6 and 8 years old) and the other two resting (3 and 9 years old). Soil samples were taken every month during one year and divided into two depths (0-5 and 5-10 cm). Vegetation dynamics were also evaluated (number of plants, inflorescences and seedlings). Soil seed bank (SSB) dynamics showed structural patterns in time, with a...

Manipulation of natural grassland in Semiarid region: a review.

Palavras-chave: Annual ryegrass; Buried seeds; Soybean; Grasslands; No til system.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222008000200013

CONRADO, J. A. de A.; CAVALCANTE, A. C. R.; TONUCCI, R. G.; CÂNDIDO, M. J. D..

Abstract: Because the Caatinga is one of the most densely populated areas in the world and having agriculture and livestock farming as its main activities, ithas been suffering aprocess of desertificationover the years, reflecting on losses in biodiversity and animal productivity, especiallyas agricultural practices are based on deforestation and burning of native vegetation. Thus, it becomes necessary and fundamental, a searchingfor management practices that intensify the use of caatinga?s resources without degrading them. This review aimsto highlight the use of manipulation techniques of the woody stratum of the Caatinga vegetation, asthinning and enrichment, which aim to increase the support capacity of the native and cultivated pasture, through the...