Study on Soil Denitrification in Wheat-Maize Rotation System  

作　　者：ZOU Guo-yuan ZHANG Fu-suo JU Xiao-tang CHEN Xin-ping LIU Xue-jun 

机构地区：[1]Institute of Plant Nutrition and Natural Resources, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100089, P.R.China [2]Department of Plant Nutrition, China Agricultural University, Beijing 100094, P.R.China

出　　处：《Agricultural Sciences in China》2006年第1期45-49,共5页中国农业科学（英文版）

摘　　要：Soil denitrification was studied in wheat-maize rotation cropping system on an aquic cambisol. Results showed that the N loss amount by denitrification ranged from 4.7 to 9.7 kg per hectare with different levels of nitrogen application and the key stage for denitification was during summer maize-growth-period, especially within 1-2 weeks after fertilizer nitrogen was applied. Similar trend was found between soil N2O production/emission dynamic and denitrification dynamic in the rotation system, which may indicate that mainly N2O is produced in nitrification process.Soil denitrification was studied in wheat-maize rotation cropping system on an aquic cambisol. Results showed that the N loss amount by denitrification ranged from 4.7 to 9.7 kg per hectare with different levels of nitrogen application and the key stage for denitification was during summer maize-growth-period, especially within 1-2 weeks after fertilizer nitrogen was applied. Similar trend was found between soil N2O production/emission dynamic and denitrification dynamic in the rotation system, which may indicate that mainly N2O is produced in nitrification process.

关 键 词：aquic cambisol winter wheat summer maize DENITRIFICATION N2O 

分 类 号：S512.1[农业科学—作物学] S513