Atributos químicos de solo sob produção orgânica influenciados pelo preparo e por plantas de cobertura
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Data
2011
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Resumo
This study aimed to determine the influence of the cover crops sunhemp (Crotalaria juncea), pigeon pea
(Cajanus cajan (L.) Millsp), velvet bean (Mucuna aterrima), sorghum (Sorgum technicum), and fallow on
chemical attributes of soil cultivated with organic common bean and corn, under no-tillage (NT) and
conventional tillage (CT) systems. The work was conducted in Santo Antônio de Goiás-GO, in Oxisol, in
a randomized block design, with four replications. In November 2003 four experiments were installed,
two of them under NT and the other two in CT. In each soil management system, an experiment was
carried out with common bean crop and another with corn. Samples were taken from soil layers of
0-0.10 and 0.10-0.20 m in September 2003 and in November 2007. The soil pH and the contents of P,
K + , Ca 2+ , Mg 2+ , Cu 2+ , Zn 2+ , Fe 3+ , Mn 2+ , H + + Al 3+ , and soil organic matter were analyzed, and cation
exchange capacity and base saturation were calculated. After four years, cover crops did not differ in
their effects on soil chemical attributes, however, they increased the content of organic matter in relation
to initial condition, under NT or in CT. In general, the nutrient recycling by cover crops was not sufficient
to maintain the P, K + , Fe 3+ and Mn 2+ contents in the soil.
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Phaseolus vulgaris L., Zea mays, Semeadura direta, Fertilidade do solo, Preparo convencional, Phaseolus vulgaris L., Zea mays L., Soil fertility, Conventional tillage, no-tillage
Citação
CUNHA, Eurâimi de Q.; STONE, Luís F.; DIDONET, Agostinho D.; FERREIRA, Enderson P. de B.; MOREIRA, José A. A.; LEANDRO, Wilson M. Atributos químicos do solo sob produção orgânica influenciados pelo preparo e plantas de cobertura. Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 15, n. 10, p. 1021-1029, 2011.