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Estoques de carbono e nitrogênio sob diferentes condições de manejo de um Argissolo Vermelho Amarelo, cultivado com milho doce nos tabuleiros costeiros de Sergipe
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Advisor(s)
Abstract(s)
O objetivo deste estudo foi analisar o efeito de diferentes sistemas de cultivo com plantas de cobertura
em sucessão ao milho doce (Zea mays L.) no estoque de C e N do solo, em experimento de longa
duração conduzido em um Argissolo Vermelho-Amarelo nos Tabuleiros Costeiros no Estado de Sergipe.
Utilizou-se um sistema de faixas experimentais sob parcelas subdivididas, compostos por 12 tratamentos
que associam três manejos de solos (parcelas), compostas por sistema de cultivo convencional (CC),
cultivo mínimo (CM) e o sistema plantio direto (PD) e, como subparcelas, quatro plantas, sendo duas
comerciais [amendoim (Arachis hypogeae), feijão (Phaseolus vulgaris) e duas de cobertura: [guandu
(Cajanus cajan) e crotalária (Crotalaria juncea)], com três repetições. No Plantio Direto houve um
maior incremento do carbono orgânico total em comparação aos outros sistemas de manejo.Os sistemas
Plantio Direto e Cultivo Mínimo foram os que mais contribuíram para o aumento dos teores de nitrogênio
total no solo. As plantas de cobertura feijão, amendoim e guandu proporcionaram maiores estoques
de carbono, dentro do sistema Plantio Direto. No Cultivo Mínimo o guandu proporcionou maiores
estoques de nitrogênio. Os sistemas Plantio Direto e Cultivo Mínimo apresentaram os maiores estoques
de carbono e nitrogênio respectivamente, em comparação ao Cultivo convencional, contribuindo para
uma melhor sustentabilidade agrícola.
This study was carried out in a long term experiment and aimed to evaluate the effects of different tillage systems associated with cover crops following sweet corn (Zea mays L.) cultivation on soil C and N stocks. The soil was a red-yellow Ultisol, characteristic of the coastal tableland in the estate of Sergipe. Experimental bands over a split plot scheme were set up with 12 treatments: three management systems (conventional tillage (CC), reduced tillage (CM) and, No-tillage (PD), in the plots, and four cover crops (peanut (Arachis hypogeae), common bean (Phaseolus vulgaris), pigeon pea (Cajanus cajan) and, crotalaria (Crotalaria juncea), in the subplots, with three replications. The highest soil organic carbon input was observed on the No-tillage system as compared to the other tillage systems. As far as N content is concerned, both No-tillage and reduced tillage systems contributed the most. No tillage system associated with cover crops such as Common bean, Peanut and Pigeon pea contributed to a higher soil organic carbon stock while higher N stock was observed when Pigeon pea was associated with reduced tillage system. No-tillage and reduced tillage systems presented higher C and N stocks, respectively, when compared to conventional tillage, improving agriculture sustainability.
This study was carried out in a long term experiment and aimed to evaluate the effects of different tillage systems associated with cover crops following sweet corn (Zea mays L.) cultivation on soil C and N stocks. The soil was a red-yellow Ultisol, characteristic of the coastal tableland in the estate of Sergipe. Experimental bands over a split plot scheme were set up with 12 treatments: three management systems (conventional tillage (CC), reduced tillage (CM) and, No-tillage (PD), in the plots, and four cover crops (peanut (Arachis hypogeae), common bean (Phaseolus vulgaris), pigeon pea (Cajanus cajan) and, crotalaria (Crotalaria juncea), in the subplots, with three replications. The highest soil organic carbon input was observed on the No-tillage system as compared to the other tillage systems. As far as N content is concerned, both No-tillage and reduced tillage systems contributed the most. No tillage system associated with cover crops such as Common bean, Peanut and Pigeon pea contributed to a higher soil organic carbon stock while higher N stock was observed when Pigeon pea was associated with reduced tillage system. No-tillage and reduced tillage systems presented higher C and N stocks, respectively, when compared to conventional tillage, improving agriculture sustainability.
Description
Keywords
Carbono Nitrogênio Plantas de sucessão Carbon Nitrogen Succession plants . Escola Superior de Tecnologias e Gestão
Citation
Pedra, W. N., Pedrotti, A., Silva, T. O., Macedo, F. L. de, & Gonzaga, M. I. S. (2012). Estoques de carbono e nitrogênio sob diferentes condições de manejo de um Argissolo Vermelho Amarelo, cultivado com milho doce nos tabuleiros costeiros de Sergipe. Semina: Ciências Agrárias, 33(6), 2075–2090. https://doi.org/10.5433/1679-0359.2012v33n6p2075
Publisher
Universidade Estadual de Londrina