Influência do sistema integrado de produção agropecuária no solo e na produtividade de soja e braquiária
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Data
2015-03
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Editor
Alexsander Seleguini
Resumo
The presence of animals in farming areas can affect
soil physical structures depending on grazing intensity. This
study aimed to evaluate soil physical attributes, as well as
soybean and brachiaria yield, under no-tillage, in an integrated
crop-livestock system. Treatments were arranged in a complete
randomized blocks design, with three replications, and consisted
of different grazing heights (0.25 m, 0.35 m and 0.45 m) and a
no-grazing area. The shoot and root dry biomass of soybean
and brachiaria and soybean yield were evaluated. Soil samples
were collected from 0-5 cm, 5-10 cm and 10-20 cm depth layers
and the following soil physical attributes were determined: bulk
density, total porosity, macroporosity, microporosity, penetration
resistance and mean weight diameter of aggregates. Grazing
intensities did not affect soil bulk density in any of the analyzed
layers. There was a reduction in total porosity after the second
grazing cycle, in the 0-5 cm layer. The mean weight diameter of
aggregates was lower in grazed areas, in the 0-5 cm and 10-20 cm
layers, and an increase in the penetration mechanical resistance
was observed in all layers, especially for the 0.25 m height grazing
treatment. The total dry biomass (soybean + brachiaria) and shoot
dry biomass of brachiaria were lower in grazed areas. However,
the soybean yield was not affected by the different grazing cycles.
Descrição
Palavras-chave
Glycine max L., Urochloa ruziziensis, Agregação do solo, Porosidade do solo, Soil aggregation, Soil porosity
Citação
BONETTI, João de Andrade; PAULINO, Helder Barbosa; SOUZA, Edicarlos Damacena de; CARNEIRO, Marco Aurélio Carbone; SILVA, Geanderson Nascimento da. Influência do sistema integrado de produção agropecuária no solo e na produtividade de soja e braquiária. Pesquisa Agropecuária Tropical, Goiânia, v. 45, n. 1, p. 104-112, jan./mar. 2015. Disponível em: <https://www.revistas.ufg.br/pat/article/view/29625/18281>.