Distribution of atrazine in a crop-soil-groundwater system at Baiyangdian Lake area in China

In this paper, the concentration distribution and environmentalfate of atrazine in a crop-soil-groundwater system at Baiyangdian Lake area of North China were studied. The concentration of the herbicide in spatial and vertical soils, and in roots, stem, leaf, corncob and kernel of corn, and in groundwater were measured by HPLC. The results showed that the variation of spatial concentration of atrazine in soil can be described by first-order kinetics equation which has a half-life of 360 days and a rate constant of 0.0019d-1. The vertical variation of atrazine concentration with soil depth follows the exponential decay law. After 120 days following atrazine application, the mass distributions of this herbicide in crop-soil-groundwater system are 71% in soil, 20% in groundwater and 1% in crop respectively, and 8% due to loss by degradation or often removal processes. The order of atrazine concentration in every part of corn crop is in roots>in corncob>in kernel of corn>in leaf.

作 者： YE Chang-ming GONG Ai-jun WANG Xing-jun ZHENG He-hui Lei Zhi-fang   作者單位： Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences,  刊 名： 環(huán)境科學(xué)學(xué)報(bào)(英文版)  ISTIC SCI 英文刊名： ENVIRON MENTAL SCIENCES  年，卷(期)： 2001 13(2)  分類號： X13  關(guān)鍵詞：  

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