Nitrous Ozide Emissions from Long-term Fertilized Black Soils in Harbin,China
At soil water content of 70％ water holding capacity, different long-term fertilized black soils were incubated to investigate nitrous oxide (N2O) emission. Maximal N2O emission was observed at the beginning of 24-h and 48-h incubation after the rewetting of dry soil. The treatment of combined normal fertilizer N, P with manure emitted the highest N2O-N, was up to 737 μg kg-1.Long-term application of fertilizer nitrogen combined with manure could efficiently increase N2O emission, and cumulative N2O-N emissions of double fertilizer N plus double manure, normal fertilizer N plus manure and normal fertilizer N were 268, 162 and 148 μg kg-1, respectively. Increasing application amount of manure could increase N2O emission, and cumulative N2O-N emissions of double manure and normal manure treatments were 131 and 116 μg kg-1, respectively. Cumulative N2O-N emission of double fertilizer N was 232 μg kg-1, N2O emission increased with the increase of nitrogen application. However, N2O emission decreased with the increase of phosphorus application, and cumulative N2O-N emissions of double fertilizer P and normal fertilizer P were 132 and 201 μg kg-1, respectively. Combined normal fertilizer NPK with manure emitted lower N2O, and this treated soil could supply the necessary elements of crop and soil biota and balance soil fertility.
greenhouse gas nitrous ozide black soils longterm fertilization
Wang Lianfeng Cai Yanjiang Sun Xin Wang Lianfeng Xie Hongtu Zhang Xudong
College of Environmental and Chemical Engineering Dalian Jiaotong University Dalian 116028, China Key Laboratory of Terrestrial Ecological Process Institute of Applied Ecology, Chinese Academy of Sc
国际会议
上海
英文
3927-3930
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）