Center for Advanced Studies in Weed Research (NAPD), Agronomy Department (NAPD/UEM), Universidade Estadual de Maringá, Maringá, PR, Brazil.
J Agric Food Chem. 2011 Apr 27;59(8):4045-50. doi: 10.1021/jf104992w. Epub 2011 Mar 23.
Aminocyclopyrachlor sorption/desorption was investigated in 14 soils from Brazil, representing a range of pH, and organic carbon (OC) and clay contents. The Freundlich equation adequately described behavior of aminocyclopyrachlor in soil. Freundlich sorption coefficient (K(f)) values ranged from 0.06 to 1.64 and 1/n values for ranged from 0.9 to 1.0. Sorption was correlated to OC (K(f,oc) ranged from 11 to 64) and clay contents. The lowest sorption was found for soils with very low OC contents (0.50-0.65%) and loamy-sand to sand textures. The 1/n values for desorption were lower than those observed for sorption, suggesting that aminocyclopyrachlor sorption by soil was not reversible; hysteresis coefficients ranged from 0.13 to 0.74. The results suggest that although aminocyclopyrachlor would be very mobile based on its sorption coefficients, its potential depth of leaching may be overestimated due to the hysteretic desorption.
在巴西的 14 种土壤中研究了 Aminocyclopyrachlor 的吸附/解吸情况，这些土壤代表了一系列的 pH 值、有机碳 (OC) 和粘粒含量。Freundlich 方程很好地描述了 Aminocyclopyrachlor 在土壤中的行为。Freundlich 吸附系数 (K(f)) 值范围为 0.06 至 1.64，1/n 值范围为 0.9 至 1.0。吸附与 OC（K(f,oc) 值范围为 11 至 64）和粘粒含量有关。对于 OC 含量非常低（0.50-0.65%）和壤土-砂质至砂质土壤，吸附作用最低。解吸的 1/n 值低于吸附观察到的值，表明 Aminocyclopyrachlor 土壤吸附不是可逆的；滞后系数范围为 0.13 至 0.74。结果表明，尽管根据其吸附系数 Aminocyclopyrachlor 具有很强的移动性，但由于滞后解吸作用，其潜在的淋溶深度可能被高估。
