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| Registros recuperados: 16 | |
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| PAIXÃO, J. de S.; ANDRADE, C. de L. T. de; GARCIA Y GARCIA, A.; AMARAL, T. A.; STEIDLE NETO, A. J.; MARIN, F. R.. |
| ABSTRACT - Maize produced under rainfed conditions are highly affected by the inherent annual and intra-seasonal weather variability, especially dry spells, that affect productivity. One of the simplest strategies with virtually no cost to mitigate this problem is the determination of a sowing window. The objectives of this study were to: a) use the results of maize yield simulated with a process-based model to establish sowing windows and, b) compare our results with the current methodology employed by the Brazilian Ministry of Agriculture (MAPA). The CSM-CERES-Maize model was used to simulate scenarios of weekly sowing dates, under rainfed conditions, for selected counties of Minas Gerais State, Brazil. For each sowing date it was determined the yield... |
| Tipo: Artigo de periódico |
Palavras-chave: Climate risk; Sowing window; Modeling; DSSAT.; Zea Mays.. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1013807 |
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| ALVES, H. K. M. N.; JARDIM, A. M. da R. F.; SOUZA, L. S. B. de; ARAÚJO JÚNIOR, G. do N.; ALVES, C. P.; ARAUJO, G. G. L. de; STEIDLE NETO, A. J.; SALVADOR, K. R. da S.; PINHEIRO, A. G.; SILVA, T. G. F. da. |
| Forage cactus cropping systems that include a combination of agricultural practices (cloning, irrigation, mulching, and/or intercropping) can increase forage production and economic return in semi-arid environments. This study evaluated the effect on productivity, biological efficiency, and economic return of combining different practices with forage cactus cropping systems in the semi-arid region of Brazil. The research was conducted in four experimental areas, in a randomized block design with four replications, and included the following practices: 1) clones – irrigation - cover, 2) different irrigation depths, 3) intercropping - mulching, and 4) different levels of mulch. The treatments in experiment I consisted of three cactus clones (‘Orelha de... |
| Tipo: Artigo de periódico |
Palavras-chave: Nopalea; Capacidade competitiva; Valor presente líquido; Forragem; Palma Forrageira; Nutrição Animal; Opuntia; Pastures; Forage; Animal nutrition. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1151253 |
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| ANDRADE, C. de L. T. de; MAGALHÃES, B. G.; LOPES, D. de C.; STEIDLE NETO, A. J.; SOUZA, I. R. P. de; AMARAL, T. A.. |
| Ongoing climate change may affect rainfed maize yield in Brazil, which can be attenuated by some crop management strategies. This work aimed to evaluate, by using computational modeling, management practices with potential to mitigate the effects of changes in temperature and CO2 concentration on maize yield. The CSM-CERES-Maize model was applied to simulate the mitigating potential of using maize cultivars with 0.3 m, 0.5 m and 0.7 m deep root system, associated with 0 t ha-1, 2 t ha-1 and 4 t ha-1 of crop residue left on the soil surface. A set of 33 years of daily weather data, along with soil profile data, were used to evaluate the approach in 10 regions of the state of Minas Gerais, Brazil. For most of the regions, the use of mulching and of a maize... |
| Tipo: Artigo de periódico |
Palavras-chave: Aquecimento global; DSSAT; Profundidade de raiz; Root depth; Zea Mays; Palhada; Milho; Modelo de Simulação; Global warming; Mulching; Simulation models. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1133065 |
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| QUEIROZ, M. G. de; SILVA, T. G. F. da; ZOLNIER, S.; SOUZA, C. A. A. de; SOUZA, L. S. B. de; STEIDLE NETO, A. J.; ARAUJO, G. G. L. de; FERREIRA, W. P. M.. |
| The Caatinga Domain is exclusively Brazilian, covered by vegetation exhibiting a great diversity of species, which have morphological and physiological characteristics determined by environmental conditions. These attributes define quantity and quality litterfall deposition on the soil. The litterfall deposition seasonality was monitored a fragment of Caatinga vegetation, located in the semiarid region of Brazil, from 2016 to 2017. The decomposition rate, mean residence time for litterfall (50 and 95%), and the exportation of mineral nutrients via deciduous material were determined. Data from meteorological variables and litterfall were used in the elaboration of Pearson's correlation matrix, and multicollinearity, canonical and path analyzes. The Caatinga... |
| Tipo: Artigo de periódico |
Palavras-chave: Semiárido; Variáveis ??ambientais; Processo de decomposição; Padrão sazonal; Caatinga; Vegetação Nativa. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113706 |
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| SILVA, T. G. F. da; QUEIROZ, M. G. de; ZOLNIER, S.; SOUZA, L. S. B. de; SOUZA, C. A. A. de; MOURA, M. S. B. de; ARAUJO, G. G. L. de; STEIDLE NETO, A. J.; SANTOS, T. S. dos; MELO, A. L. de; CRUZ NETO, J. F. da; SILVA, M. J. da; ALVES, H. K. M. N.. |
| The Brazilian semiarid region has been subjected to strong man-made actions since the 1970s, which have resulted in landscape transformation. The scientific literature presents several studies on the soil properties or microclimate of different types of landscapes; however, less attention was having been paid to the surface contrast between native vegetation and bare soil. The objective of this research was to evaluate the soil properties and microclimate of two common landscapes in the Brazilian semiarid region, a seasonally dry tropical forest (Caatinga) and a deforested area. Soil and microclimate data were obtained from two sites, both located in the State of Pernambuco, Brazil. Soil samples were collected on six dates and from layers, and microclimate... |
| Tipo: Artigo de periódico |
Palavras-chave: Abandono de terras agrícolas; Degradação do solo; Mudanças nos nutrientes do solo; Solo; Clima; Degradação Ambiental; Uso da Terra; Climate. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1130062 |
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| ANDRADE, C. de L. T. de; PAIXÃO, J. de S.; STEIDLE NETO, A. J.; AMARAL, T. A.; PIMENTA, F. M.; GARCIA Y GARCIA, A.; MARIN, F. R.; SILVA, D. F.. |
| Produzir milho sob condições de sequeiro é uma prática comum no Brasil. Neste sistema, de produção as culturas são fortemente afetadas pela inerente variabilidade climática anual e interanual, especialmente pelos veranicos, que afetam a produtividade. Uma das estratégias mais simples, com praticamente nenhum custo, para mitigar este problema é a determinação de uma janela de semeadura, que minimize os efeitos negativos da variabilidade climática na agricultura de sequeiro. Os objetivos deste estudo foram: a) usar os resultados de produtividade de milho simulada com um modelo baseado em processos, para estabelecer janelas de semeadura e b) comparar os resultados obtidos com a atual metodologia empregada pelo Ministério da Agricultura, Pecuária e... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Modelo de simulação; Semeadura; Zea mays; Simulation models; Sowing. |
| Ano: 2013 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/974352 |
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| Registros recuperados: 16 | |
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