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Inhibitory Effects of Different Types and Doses of Herbicides on Soil Nitrification Potentials

文献类型: 外文期刊

作者: Ding, Hong 1 ; Zou, Yue 1 ; Zheng, Xiangzhou 1 ; Zhang, Yushu 1 ; Yu, Juhua 1 ; Chen, Deli 2 ;

作者机构: 1.Fujian Acad Agr Sci, Inst Soil & Fertilizer, Fuzhou 350013, Fujian, Peoples R China

2.Univ Melbourne, Fac Vet & Agr Sci, Melbourne, Vic 3010, Australia

关键词: Herbicide; Nitrification; 2; 4-D; Soil types; Nitrification inhibitor

期刊名称:WATER AIR AND SOIL POLLUTION ( 影响因子:2.52; 五年影响因子:2.574 )

ISSN: 0049-6979

年卷期: 2019 年 230 卷 8 期

页码:

收录情况: SCI

摘要: To elucidate the inhibitory effects of different herbicides on soil nitrification, eight widely used herbicides, i.e., acetochlor, atrazine, dicamba, isoproturon, paraquat, puma, tribenuron-methyl, and 2,4-dichlorophenoxyacetic acid butyl ester (2,4-Dbe), which represent different chemical taxonomy were selected. Our results indicated that herbicide 2,4-Dbe displayed the best inhibitory effect on nitrification, followed by puma and tribenuron-methyl, whereas the remaining five herbicides exhibited less effect when 10 mg of active ingredient (A.I.) of every herbicide per kg of soil was applied in vegetable-planting soil. The inhibition appeared when 5-100 mg of A.I. 2,4-Dbe was employed, which was enhanced with an increment in its dose in both vegetable-planting and fluvo-aquic soils. However, the inhibitory effect of 10 mg of A. I. 2,4-Dbe exhibited obvious differences in these two types of soils, where the duration of inhibition was shorter as it only continued about a week in fluvo-aquic and calcic cambisols soils with strong nitrification activity but poorer effect as compared to 10 mg of dicyandiamide (DCD). In contrast, the duration of inhibition exceeded 2 months in dryland red and shajiang black soils with a weak nitrification activity which was equivalent to DCD. In addition, comparing with five nitrification inhibitors, 10 mg of 2,4-Dbe had better inhibition than the substituted pyrimidine (AM) and sulfocarbamide (SU), but was equivalent to DCD, nitrapirin, and 3,4-dimethylpyrazole phosphate (DMPP) at their recommended application rates in dryland red soil. These obtained data clearly indicated that 2,4-Dbe could play a stronger role as a nitrification inhibitor in soils.

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