Nitrous Oxide Flux from Long-term Fertilized Black Soils in A Snowfall Process

文献类型： 外文期刊

第一作者： Wang Lianfeng

作者： Wang Lianfeng;Han Zuoqiang;Sun Xin;Zhang Xilin;Wang Lianfeng;Cai Yanjiang

作者机构：

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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