Measurement of coupled nitrification-denitrification in paddy fields affected by Terrazole, a nitrification inhibitor
Measurement of coupled nitrification-denitrification in paddy fields affected by Terrazole, a nitrification inhibitor
复制标题
DOI：
10.1007/s00374-003-0673-7
复制
发表时间：
2004-02-01
影响因子：
6.5
通讯作者：
Quesada, A
中科院分区：
文献类型：
--
作者：
Carrasco, D;Fernández-Valiente, E;Quesada, A
在实验室和田间条件下，以（N2 O）-N-15和N-15（2）的释放速率为指标，研究了硫酸铵处理水稻土中添加和不添加Terrazole [5-乙氧基-3-（三氯甲基）1，2，3噻二唑]时的硝化-反硝化耦合作用和潜在反硝化作用。在土壤干燥和再湿润后，硝化-反硝化耦合活性最大，实验室最大值为322 ng N cm（-2）h（-1），田间最大值为90.8 ng N cm（-2）h（-1）。这些（N2 O）-N-15 + N-15（2）的释放速率比这些土壤中潜在的反硝化作用低约10倍。这些结果以及在用Terrazole处理的土壤中观察到的（N2 O）-N-15 + N-15（2）释放速率的降低（实验室条件下为60%，田间条件下为52%）表明，反硝化作用受到硝化-反硝化作用耦合活性的限制。在硫酸铵施肥的土壤中，氧和预先添加硫酸铵似乎控制着（N2 O）-N-15 + N-15（2）的释放速率。
Coupled nitrification-denitrification and potential denitrification were measured as (N2O)-N-15 and N-15(2) evolution rates in ammonium sulphate-treated rice soils with or without Terrazole [5-ethoxy-3 (trichloromethyl) 1,2,3 Thiadizole] under laboratory and field conditions. The greatest coupled nitrification-denitrification activity was found after drying and rewetting the soil, with maximum values of 322 ng N cm(-2) h(-1) in the laboratory and 90.8 ng N cm(-2) h(-1) in the field. These (N2O)-N-15 + N-15(2) evolution rates were about 10 times lower than potential denitrification in these soils. These results and the observed decrease in (N2O)-N-15 + N-15(2) evolution rate in soils treated with Terrazole (60% under laboratory conditions and 52% under field conditions) indicate that denitrification was limited by coupled nitrification-denitrification activity. Oxygen and previous addition of ammonium sulphate appear to control the rate of (N2O)-N-15 + N-15(2) evolution in ammonium sulphate-fertilised soils.