安徽农业科学2012，Vol.40Issue(28)：13777-13780,4.
不同施肥制度的川中丘陵区小麦-玉米轮作田N2O排放特征
N2O Emission Characteristics of Different Fertilization Treatments in Wheat-Maize Rotation in Hilly Area of Purple Soil
摘要
Abstract
[ Objective] The Effects of different fertilization systems on the hilly area of purple soil in wheat maize rotation system of nitrous oxide (N2o) emissions and emission characteristics were studied. [Method] 6 treatments were arranged,i, e. organic fertilizer treatment (OM) , NPK fertilizer treatment ( NPK) , nitrogen fertilizer treatment ( N) , NPK fertilizer and straw treatment (RSDNPK) , NPK fertilizer and organic fertilizer treatment (OMNPK) and without fertilizer treatment (CK). The static chamber/gas chromatography was usde to set located observation for wheat maize rotation system soil nitrous oxide (N2o) emissions under the different fertilization, the analysis of N2o emissions characteristic and the effects of 6 different fertilization systems on soil N2o emission and the relationship between environment factor and N2o emissions. [Result] The total N2O emissions amount in the wheat-maize rotation system in the hilly area of purple soil was 0.73 ~ 4. 51 kg/hm , and the order was OM > OMNPK > N > NPK > RSDNPK > CK. The N2o emissions increased 517. 8% , 369. 9% , 275.3% , 238.4% and 212. 3% respectively,compared with the treatment without fertilization. There were significant differences among different treatments. NPK fertilizer and straw treatment could effectively control N2o emission under the same fertilization condition. [Conclusion] The total N2o emission contributions were 30% , 10% and 60% respectively in wheat season, fallow season and corn season to the total rotation periods. Fertilization was the main driving factor for the increase of the soil N2O emission. The soil temperature and moisture was the main factor of soil N2O emissions in wheat season and fallow season. Rainfall was the main factor of soil N2O emissions in corn season. The lower soil moisture content was the main reason of soil N2o absorption phenomenon in wheat season and fallow season in the hilly area of purple soil. The N2o emission from soil could be inhibited if the soil WFPS was controlled by < 50% or > 80% in the hilly area of purple.关键词
N2O排放/小麦-玉米轮作/施肥/川中丘陵区/紫色土Key words
N2O emission/ Wheat-maize rotation/ Fertilization/ Hilly area/ Purple soil分类
农业科技引用本文复制引用
曾泽彬,刘学锋,王一,李冬兵..不同施肥制度的川中丘陵区小麦-玉米轮作田N2O排放特征[J].安徽农业科学,2012,40(28):13777-13780,4.
