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Efeito da compactação do solo e do sulfentrazone sobre a cultura da soja em duas condições de água no solo

L. Zobiole,R. S. Oliveira,C. A. Tormena,J. Constantin,S. D. Cavalieri,D. G. Alonso,A. M. Brighenti,C. R. T. D. Castro

Published 2007 in Planta Daninha

ABSTRACT

This experiment aimed to evaluate the activity of sulfentrazone on soybean plants grown in a Typic Haplorthox, under different soil compaction levels. Experimental units were PVC columns 0.25 m high and with 0.145 m of internal diameter, in which enough soil mass (30% moisture) was placed to achieve the desired compaction level. The experimental design was completely randomized, in a 4 x 2 x 2 factorial scheme, corresponding to four compaction levels (1.0, 1.2, 1.4 and 1.5 g cm-3), presence or absence of herbicide and two soil moistures (80 and 70% of total porosity filled with water), with four replicates. Sulfentrazone reduced the foliar area, nodule development, nodule dry matter and shoot nitrogen accumulation. Such effects became more pronounced with increased soil compaction.

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