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Time-Dependent Movement and Distribution of Chlorpyrifos and Its Metabolism in Bamboo Forest under Soil Surface Mulching

Articles

Journal/Conference:

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

Language:

English

Author:

Liu Yihua; Shen Danyu; Zhong Donglian; Mo Runhong

Experts:

Ni Zhanglin; Tang Fubin

Year:

2014

Volume:

62

Issue:

28

Pages:

6565-6570

Keywords:

chlorpyrifos; 3,5,6-trichloro-2-pyridinol; degradation; bamboo shoot; soil surface mulching

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.