Liu Yihua, Shen Danyu, Zhong Donglian, Mo Runhong, Ni Zhanglin, Tang Fubin
Research Institute of Subtropical Forestry, Chinese Academy of Forestry , Fuyang 311400, People's Republic of China.
J Agric Food Chem. 2014 Jul 16;62(28):6565-70. doi: 10.1021/jf501540e. Epub 2014 Jul 7.
The dissipation and distribution of chlorpyrifos (CHP) granule formulation in bamboo forest under soil surface mulching conditions (CP) and noncovered cultivation conditions (NCP) from soil to product were investigated. In the CP treatment, the CHP granule with slow-release effect leached from the topsoil to the subsoil. Conversely, the CHP was fixed in the topsoil (0-5 cm layer) in the NCP treatment, and no obvious leaching effect could be observed. The residue of CHP could be found in bamboo shoots from CP treatment, mainly at the bottom part (5 cm length). CHP could be degraded into 3,5,6-trichloro-2-pyridinol (TCP) in the soil and bamboo shoots. In addition, the straw used as the mulching material with higher OM and pH had some regulatory role in changing the pH and OM characteristics of the soil. Thus the straw could indirectly affect the adsorption and degradation behavior of CHP and TCP in the soil.
研究了毒死蜱（CHP）颗粒剂在土壤表面覆盖条件下（CP）和无覆盖栽培条件下（NCP）从土壤到竹产品在竹林中的消散和分布情况。在CP处理中，具有缓释作用的CHP颗粒剂从表层土壤淋溶到下层土壤。相反，在NCP处理中，CHP固定在表层土壤（0-5厘米层）中，未观察到明显的淋溶效应。在CP处理的竹笋中可发现CHP残留，主要在底部（5厘米长度处）。CHP可在土壤和竹笋中降解为3,5,6-三氯-2-吡啶醇（TCP）。此外，用作覆盖材料的秸秆具有较高的有机质（OM）和pH值，对改变土壤的pH值和OM特性具有一定的调节作用。因此，秸秆可间接影响CHP和TCP在土壤中的吸附和降解行为。
