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Bragantia  2011 

Forma??o e manuten??o de palhada de gramíneas concomitante à influência da aduba??o nitrogenada em cobertura no feijoeiro irrigado em sistema de semeadura direta

DOI: 10.1590/S0006-87052011000400026

Keywords: phaseolus vulgaris, zea mays, brachiaria ruziziensis, yielding components, yield, technological grains.

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Abstract:

the definition of the nitrogen topdressing rates in common bean irrigated in succession to grain and cover crops on no-tillage system is critical to increase the yield, nutritional and technological quality of the final product. the aim of this study was to verify the formation and maintenance feasibility of cover mulch to tropical climate region and the nitrogen topdressing influence (0, 40, 80, 120 and 160 kg ha-1 of nitrogen) on irrigated common beans (winter-spring), in succession to crop mulch formed in the first year of no-tillage system implementation. the experimental design was in split plot, with three replications in randomized blocks. the main plots were represented by three systems of straw production (corn, corn intercropped with brachiaria ruziziensis, and b. ruziziensis) and the subplots for nitrogen topdressing rates. the b. ruziziensis mulch provided major quantity and maintenance of the ground cover and increased yield components and grain yield. the nitrogen topdressing application in common beans plants cultivated in succession to b. ruziziensis, corn intercropped with b. ruziziensis and corn does not increase grain yield in the first year of no-tillage system implementation.

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