Influence of soil factors on the dissipation of a new pyrimidynyloxybenzoic herbicide ZJ0273.
Influence of soil factors on the dissipation of a new pyrimidynyloxybenzoic herbicide ZJ0273.
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DOI：
10.1021/jf904105b
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发表时间：
2010-03
影响因子：
6.1
通讯作者：
Wei Wang;Q. Ye;Wei Ding;Ai-liang Han;Haiyan Wang;Long Lu;J. Gan
中科院分区：
文献类型：
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作者：
Wei Wang;Q. Ye;Wei Ding;Ai-liang Han;Haiyan Wang;Long Lu;J. Gan
在灭菌和非灭菌条件下，将一种在苯甲酸环上均匀标记~(14)C的新型嘧啶氧基苯甲酸除草剂(ZJ0273)应用于土壤，以了解土壤微生物及其某些性质对其在土壤中的消散和转化为结合残留物和(14)CO(2)的影响。在酸性土壤中，土壤微生物的作用显著，杀菌显著延长了ZJ0273的半衰期(DT(50))，从15.57天延长到34.31天，矿化(14)CO(2)总量从19.91%下降到0.43%。然而，灭菌对pH和gt；或=6.1的土壤中结合残留物或可提取残留物水平的模式影响有限。此外，高pH值对可提取残留物的消散和结合残留物的形成有显著的抑制作用。低土壤pH促进了土壤结合残留物的形成，这归因于ZJ0273向其中间体的转化增加，这些中间体可迅速与土壤有机质结合。
A novel pyrimidynyloxybenzoic herbicide (ZJ0273) uniformly labeled with (14)C on the benzoate ring was applied to soils under sterile and nonsterile conditions to understand the effect of soil microorganisms and selected properties on its dissipation and transformations to bound resides and (14)CO(2). A significant effect of soil microorganisms was found in an acidic soil, where sterilization significantly prolonged the half-dissipation time (DT(50)) of ZJ0273 from 15.57 to 34.31 days and decreased the total amount of mineralized (14)CO(2) from 19.91 to 0.43%. However, sterilization showed limited effect on the patterns of bound residue or extractable residue levels in soils having pH > or = 6.1. In addition, a significant suppression of high pH was found on the dissipation of extractable residues and formation of bound residues. The enhancement of bound residue formation by low soil pH was attributed to increased conversion of ZJ0273 to its intermediates, which were rapidly bound to soil organic matter.