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| Carvalho,Arminda Moreira de; Bustamante,Mercedes Maria da Cunha; Coser,Thais Rodrigues; Marchão,Robélio Leandro; Malaquias,Juaci Vitória. |
| Abstract The objective of this work was to evaluate the effect of two legumes (Crotalaria juncea and Mucuna pruriens), as cover crops, and of natural fallow, as a control treatment, on the emissions of NOx, N2O, and CO2 from an Oxisol cultivated with corn, under conventional and no-tillage systems, in the Cerrado region, in Central Brazil. Variations of CO2 fluxes in the soil were explained mainly by soil humidity and, in the legumes, under conventional system, by soil NH4+-N concentration. Plots with legumes under no-tillage system had higher annual emissions of CO2, NOx, and N2O than natural fallow. Results show that the use of legumes as cover crops favors the emissions of NOx-N + N2O-N and CO2-C. However, when considering the potential for mitigation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crotalaria juncea; Mucuna pruriens; Carbon and nitrogen stocks; Cerrado; Mitigating greenhouse gases. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901213 |
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| Coser,Thais Rodrigues; Ramos,Maria Lucrécia Gerosa; Figueiredo,Cícero Célio de; Carvalho,Arminda Moreira de; Cavalcante,Eduardo; Moreira,Moacir Kildery dos Reis; Araújo,Patrícia Silva Melo; Oliveira,Sebastião Alberto de. |
| Abstract The objective of this work was to evaluate the effects of corn (Zea mays) in monoculture and intercropped with forage on soil microbiological properties and nitrogen availability under no-tillage in the Cerrado (Brazilian savanna). The experiment was carried out from the 2007/2008 to the 2010/2011 crop season, in a Latossolo Vermelho-Amarelo distrófico (Typic Haplustox). A randomized complete block design with three replicates was used, with the following treatments: corn in monoculture; corn intercropped with Panicum maximum; corn intercropped with Urochloa humidicola; P. maximum in monoculture; and U. humidicola in monoculture. Soil samples were taken at 0.00-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30-m soil depths, in the begining and in the end... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Panicum maximum; Urochloa humidicola; Zea mays; Nitrogen microbial quotient; Soil microbial biomass; Soil quality. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901660 |
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| Carvalho,Arminda Moreira de; Coser,Thais Rodrigues; Rein,Thomaz Adolpho; Dantas,Raíssa de Araujo; Silva,Rafael Rodrigues; Souza,Kleberson Worslley. |
| Resumo: O objetivo deste trabalho foi avaliar o efeito do manejo de plantas de cobertura na floração e na maturação fisiológica sobre a produtividade do milho cultivado em sucessão. O experimento, em delineamento de blocos ao acaso com parcelas subdivididas, foi realizado em Latossolo Vermelho, em sistema plantio direto, com nove espécies. Foram avaliados: produtividade de matéria seca; tempo de ciclagem dos resíduos vegetais; teores de N das plantas de cobertura; e produtividade de grãos e teores de N nas folhas do milho. As espécies Pennisetum glaucum, Mucuna aterrima, Cajanus cajan e Canavalia brasiliensis apresentaram as maiores produtividades de matéria seca na floração. Na maturação fisiológica, Sorghum bicolor, P. glaucum, C. brasiliensis,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria ruziziensis; Canavalia brasiliensis; Pennisetum glaucum; Decomposição de resíduos vegetais; Plantio direto; Ciclagem de nutrientes.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000700551 |
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| Oliveira,Willian Roberson Duarte de; Ramos,Maria Lucrecia Gerosa; Carvalho,Arminda Moreira de; Coser,Thais Rodrigues; Silva,Antônio Marcos Miranda; Lacerda,Manuel Messias; Souza,Kleberson Worslley; Marchão,Robélio Leandro; Vilela,Lourival; Pulrolnik,Karina. |
| Abstract The objective of this work was to evaluate the dynamics of soil microbiological attributes under integrated production systems, continuous pasture, and native cerrado. The study was conducted in a transition area from crop to livestock. Four areas with different land uses were evaluated: an integrated crop-livestock-forestry system (ICLFS), cultivated with Eucalyptus urograndis alley cropping, spaced 2x2 m between plants and 22 m between alleys; an integrated crop-livestock system (ICLS); besides two adjacent areas of native cerrado and continuous pasture, used as a reference. For the assessment of microbiological attributes, soil samples were taken in the 0.00-0.10, 0.10-0.20, and 0.20-0.30-m layers, in February 2012 and February 2014 (rainy... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Integrated crop-livestock-forestry system; Soil management; Soil microbial biomass; Soil quality. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901501 |
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| Coser,Thais Rodrigues; Ramos,Maria Lucrécia Gerosa; Amabile,Renato Fernando; Ribeiro Júnior,Walter Quadros. |
| O objetivo deste trabalho foi avaliar o efeito da adubação nitrogenada no nitrogênio da biomassa microbiana do solo (N BMS), em diferentes profundidades, em um Latossolo Vermelho-Amarelo cultivado com cevada. O experimento foi instalado em junho de 2004, em área experimental de primeiro ano de plantio direto, anteriormente cultivada com milheto por três anos e posteriormente com soja por duas safras. Foram utilizados os seguintes tratamentos: quatro doses de nitrogênio (30, 60, 90 e 120 kg ha-1) e o controle sem adubação nitrogenada. As amostras de solo foram coletadas em quatro profundidades: 0-5, 5-10, 10-20 e 20-30 cm, com três repetições e em três épocas: perfilhamento pleno, floração e logo após a colheita. O N BMS e a razão N BMS:Ntotal diminuíram... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Qualidade do solo; Nitrogênio total; Hordeum vulgare. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000300014 |
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| Carvalho,Arminda Moreira de; Marchão,Robélio Leandro; Bustamante,Mercedes Maria da Cunha; Alcântara,Flávia Aparecida de; Coser,Thais Rodrigues. |
| The objective of this study was to investigate the chemical composition of cover crops by solid-state CPMAS 13C NMR spectroscopy and its effects on carbon, nitrogen and phosphorus in a Typic Acrustox. Cover crops (Crotalaria juncea, Canavalia brasiliensis, Cajanus cajan, Mucuna pruriens and Raphanus sativus) and natural fallow were studied in rotation with maize under conventional and no-tillage regimes. Tissues of Crotalaria juncea, Canavalia brasiliensis, Mucuna pruriens and Raphanus sativus were analyzed using CPMAS 13C NMR spectroscopy. Soil samples were collected at the end of the growing season of the cover crops (September 2002) and during the grain filling period in corn from 0-5 and 5-10 cm layers. Cajanus cajan presented the lowest content of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian Savanna; Solid-state CPMAS 13C NMR spectroscopy; Organic matter; Ecological Intensification. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500012 |
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