Influence of soil parameters on the effect of 3,4-dimethylpyrazole-phosphate as a nitrification inhibitor

被引：136

作者：

Barth G. ^{[1
]}

Von Tucher S. ^{[1
]}

Schmidhalter U. ^{[1
]}

机构：

[1] Technical University Munich

来源：

Biology and Fertility of Soils | 2001年 / 34卷 / 2期

关键词：

3,4-Dimethylpyrazole-phosphate; Adsorption; Nitrification inhibitor; Short-term incubation; Soil texture;

D O I：

10.1007/s003740100382

中图分类号：

学科分类号：

摘要：

Nitrification inhibitors specifically retard the oxidation of NH4+ to NO2- during the nitrification process in soil. In this study, the influence of soil properties on the nitrification-inhibiting effect of 3,4-dimethylpyrazole-phosphate (DMPP), a newly developed nitrification inhibitor, has been investigated. Based on short-term incubation experiments, where the degradation of DMPP could be largely disregarded, the oxidation of the applied NH4+ was more inhibited in sandy soils compared with loamy soils. The influence of soil parameters on the relative NO2- formation could be described by a multiple regression model including the sand fraction, soil H+ concentration and soil catalase activity (R2=0.62). Adsorption studies showed that the binding behaviour of DMPP was influenced markedly by soil textural properties, viz. the clay fraction (r2=0.61). The adsorption of DMPP was found to be an important factor for the inhibitory effect on NH4+ oxidation in a short-term incubation (r2-0.57). It is concluded that the evaluated soil properties can be used to predict the short-term inhibitory effect of DMPP in different soils. The significance of these results for long-term experiments under laboratory and field conditions needs further investigation.

引用

页码：98 / 102

页数：4

共 23 条

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