首页|期刊导航|中国农业科学（英文版）|Nitrification-denitrification Loss and N2O Emission from Urea Applied to Crop-soil Systems in North China Plain
中国农业科学（英文版）2002，Vol.1Issue(2)：184-188,5.
Nitrification-denitrification Loss and N2O Emission from Urea Applied to Crop-soil Systems in North China Plain
Nitrification-denitrification Loss and N2O Emission from Urea Applied to Crop-soil Systems in North China Plain
摘要
Abstract
Nitrogen losses are not only important for agriculture but environment as well. Field experiments were set up in summer corn field at Fengqiu Agro-Ecological Experimental Station of CAS in North China Plain. The soil was in maize-chao soil. Nitrification-denitrification losses and N2O emission were determined by acetylene-inhibition soil-core incubation method in the soils applied urea. The results showed that urea was fast hydrolyzed and became to nitrate. The soil with non urea released 0.33kg N/ha N2O.However, the soil produced 2.91kg N/ha N2O, about 1.94% of the applied N, when the urea was spread on soil surface. N2O emission reduced to 2.50kg N/ha, about 1.67% of the applied N, when the urea was put in deep soil by digging a hole. The denitrification loss was 1.17kg N/ha in control soil. It increased to 3.00kg N/ha and 2.09kg N/ha, which were 2.00% and 1.39% of the used N, in the soils received urea on surface and sub-surface respectively. It was suggested that nitrification-denitrification was probably not a main way of fertilizer nitrogen loss in this region.关键词
Corn, Urea, N2O emissionKey words
Corn, Urea, N2O emission引用本文复制引用
DING Hong,CAI Gui-xin,WANG Yue-si,CHEN De-li..Nitrification-denitrification Loss and N2O Emission from Urea Applied to Crop-soil Systems in North China Plain[J].中国农业科学（英文版）,2002,1(2):184-188,5.基金项目
We thank Ms. Luo Dong-mei at Atmospheric Physics Institute, CAS, for analyzing N2O. Project was supported by the National Nature Science Foundation of China ( No. 49901010 ) LAPC,Atmospheric Physics Institute, CAS (LAPC-KF2001-02) and ACIAR LWR 196/164, A （ No. 49901010 ）
