文献类型: 外文期刊
作者: Wang Lianfeng 1 ; Han Zuoqiang 1 ; Sun Xin 1 ; Zhang Xilin 2 ; Cai Yanjiang 3 ;
作者机构: 1.Dalian Jiaotong Univ, Coll Environm & Chem Engn, Dalian 116028, Peoples R China
2.Heilongjiang Acad Agr Sci, Inst Soil & Fertilizer, Harbin 150086, Peoples R China
3.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China
关键词: N2O;black soil;snowfall;freezing-thawing
期刊名称:2010 4TH INTERNATIONAL CONFERENCE ON BIOINFORMATICS AND BIOMEDICAL ENGINEERING (ICBBE 2010)
ISSN: 2151-7614
年卷期: 2010 年
页码:
收录情况: SCI
摘要: Snowfall is a general natural phenomenon in winterspring alternate season in northeast of China. Snow was melt with the increase of temperature, i.e. freezing-thawing alternations affects soil properties. Static chamber technique was used to monitor nitrous oxide (N2O) flux from black soils in a snowfall process. The fertilization treatments are none (CK), 150 kg N ha(-1) (N1), 300 kg N ha(-1) (N2) and 150 kg N ha(-1) organic manure plus 150 kg N ha(-1) chemical nitrogen fertilizer ( M1N1). Before snowfall, there is insignificant difference in N2O emission from four treatments. After snowfall, N2O emission from CK, N1, N2 and M1N1 is 9.56, 9.16, 9.86, 9.91 mg N2O-N m(-2) during 55-hour monitoring period, respectively (p<0.05). Snowmelt increase soil moisture content, which significantly stimulated the soil N2O emissions, meanwhile, freezing-thawing alternations influences N2O emission. The findings indicate that effect of snow on N2O emission should be considered separately, i.e. before and after snowfall.
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