Activity of the herbicide acetochlor in soil under no-till and conventional tillage system

作者：Ferri MVW^*; Vidal RA; Gomes J; Dick DP; de Souza RF

来源：Pesquisa Agropecuaria Brasileira, 2002, 37(12): 1697-1703.

DOI：10.1590/S0100-204X2002001200004

• weeds
• soil management
• sorption
• leaching

The activity of herbicide acetochlor in a Red Argisol (Paleudult) under no-till and conventional tillage systems was investigated in laboratory and field experiments. The herbicide was less efficient on weed control under no-till system than under conventional tillage. The reduction of wheat dry matter, evaluated in the sample collected from the 16-19 crin depth, was higher under no-till, suggesting a greater leaching capacity in this soil tillage system. The acetochlor sorption was higher on no-till system than in the conventional tillage, as indicated by the distribution coefficients on soil (K-d): 2.75 and 1.67 L kg(-1), respectively. The distribution coefficients relative to the soil organic carbon (K-oc) were 166 L kg(-1) on no-till and 126 L kg(-1) on conventional tillage, showing that the herbicide was sorbed in a greater extent by the organic matter from the no-till system.

• 出版日期2002-12