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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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| Vilela,Lourival; Martha Junior,Geraldo Bueno; Macedo,Manuel Cláudio Motta; Marchão,Robélio Leandro; Guimarães Júnior,Roberto; Pulrolnik,Karina; Maciel,Giovana Alcantara. |
| O objetivo deste trabalho foi analisar os benefícios e as perspectivas potenciais de sistemas de integração lavoura-pecuária no processo de intensificação de uso das áreas em exploração com lavoura de grãos e pastagens no Cerrado, e apontar as principais lacunas de informação sobre o sistema. Os principais benefícios da integração lavoura-pecuária são: melhoria das propriedades químicas, físicas e biológicas do solo; redução da ocorrência de doenças, insetos-pragas e plantas daninhas; maior produtividade das plantas e dos animais; e redução de riscos pela diversificação de atividades. No entanto, a adoção do sistema de integração lavoura-pecuária ainda é pequena, provavelmente em virtude da maior complexidade desse sistema. Concentrar esforços nos fatores... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agrossilvipastoril; Consórcio de culturas com forrageiras; Matéria orgânica do solo; Plantio direto. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011001000003 |
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| Veras,Márcia de Sousa; Ramos,Maria Lucrécia Gerosa; Oliveira,Daiana Nara Santos; Figueiredo,Cícero Célio de; Carvalho,Arminda Moreira de; Pulrolnik,Karina; Souza,Kleberson Worslley de. |
| ABSTRACT The use of cover crops has recently increased and represents an essential practice for the sustainability of no-tillage systems in the Cerrado region. However, there is little information on the effects of nitrogen fertilization and cover crop use on nitrogen soil fractions. This study assessed changes in the N forms in soil cropped to cover crops prior to corn growing. The experiment consisted of a randomized complete block design arranged in split-plots with three replications. Cover crops were tested in the plots, and the N topdressing fertilization was assessed in the subplots. The following cover species were planted in succession to corn for eight years: Urochloa ruziziensis, Canavalia brasiliensis M. ex Benth, Cajanus cajan (L.) Millsp, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil management; Plant nutrition; Fertilization and nutrition of annual crops. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100508 |
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| Pulrolnik,Karina; Barros,Nairam Félix de; Silva,Ivo Ribeiro; Novais,Roberto Ferreira; Brandani,Carolina Braga. |
| A substituição da vegetação nativa na região de Cerrado por florestas plantadas de eucalipto pode levar a mudanças nos estoques de C e N das diferentes frações da matéria orgânica do solo (MOS). Contudo, a intensidade e a direção da mudança nos teores de MOS dependem do tipo de solo, clima e manejo da área plantada. O objetivo deste trabalho foi determinar o efeito do plantio de eucalipto nos estoques de C e N em frações lábeis e estáveis da MOS em região de Cerrado no Vale do Jequitinhonha, MG. O estudo foi desenvolvido utilizando-se amostras de solos provenientes de povoamentos de Eucalyptus urophylla e de áreas adjacentes com vegetação natural de Cerrado e cultivo de pastagem. Para o plantio do eucalipto, a vegetação do Cerrado foi cortada, a lenha... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Substâncias húmicas; Biomassa microbiana; Matéria orgânica leve. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000500006 |
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| Souza,Kleberson Worslley de; Lima,Hedinaldo Narciso; Schaefer,Carlos Ernesto G.R.; Teixeira,Wenceslau Geraldes; Pulrolnik,Karina; Corrêa,Guilherme Resende. |
| Despite the agricultural importance of Indian Black Earth (IBE) in the Amazon region, there are few studies that report on the relation between soil texture and chemical fertility of IBE. These soils of pre-Colombian origin, with high contents of P, Ca and other nutrients are found across the Amazon valley. IBE profiles were studied to evaluate the total contents of P, its primary chemical forms and the P transformation phases in areas with IBE soils of variable texture and in adjacent reference soils. The soil texture strongly influenced soil fertility, changing in terms of transformation of the primary P forms and, consequently, predominant P forms in IBE. Soils with texture varying between clay and heavy clay had higher total P contents and primary Ca-P... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon Black Earth; Soil P fractionation; Upland soils; Manacapuru; Amazon soils; Anthropogenic soils. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000500027 |
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| Oliveira,Alexsandra Duarte de; Ribeiro,Fabiana Piontekowski; Ferreira,Eloisa Aparecida Belleza; Malaquias,Juaci Vitoria; Gatto,Alcides; Zuim,Diana Regazzi; Pinheiro,Luciano de Almeida; Pulrolnik,Karina; Soares,João Paulo Guimarães; Carvalho,Arminda Moreira de. |
| ABSTRACT Forest soils are N2O sources and commonly act as CH4 sinks. This study evaluated the dynamics of the CH4 and N2O fluxes of soils under Eucalyptus plantations and native Cerrado vegetation, as well as possible interactions between environmental factors and fluxes. The study was carried out in the Distrito Federal, Brazil, during 26 months, in three areas: in two stands of the hybrid Eucalyptus urophylla × Eucalyptus grandis, planted in 2011 (E1), and in 2009 (E2) and native Cerrado vegetation (CE). Measurements to determine the fluxes in a closed static chamber were carried out from Oct 2013 to Nov 2015. Soil and climate factors were monitored. During the study period, the mean CH4 fluxes were –22.48, –8.38 and –1.31 μg CH4 m–2 h–1 and the mean N2O... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Greenhouse gases; Forest stand age; Savanna. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000100302 |
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