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《Chinese Journal of Tropical Crops》 2008-06
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Distribution of Soil Organic Matter and Carbon Potential Fixation in Paddy Soil in Hainan

Meng Lei~1 Qi Zhiping~2 He Qiuxiang~3 Guo Qiuhui~1 Qiu Xiuling~1 Dong Zhaojia~1 1 College of Agronomy,Hainan University,Danzhou,Hainan 571737; 2 Tropical Crops Genetic Resources Institute,CATAS,Danzhou,Hainan 571737; 3 College of Horticulture and Gardening,Hainan University,Danzhou,Hainan 571737  
Change in soil organic matter is associated with the global climate change,and influences the soil quality and agricultural production.Soil organic matter was determined from samples collected from paddy soil in different climatic regions in Hainan,and the potential of carbon fixation also detected.The results showed that the paddy soil organic matter content was 13.3 g/kg in Hainan by average.Paddy soil acts as"source"of greenhouse gases based on the basic information of the second national soil survey. The spatial distribution of soil organic matter was closely related with the regions of climate types which are classified by wet and dry conditions.Of these climatic regions,the soil organic matter content was highest in the humid region,followed by in the wet region,in the semi-humid region,and in the semi-arid region,which is lowest.Soil management and cropping system which increase input of organic matter into soil can increase soil organic matter content so that the paddy soil acts as a"sink"of greenhouse gas.
【Fund】: 科技基础性工作和社会公益研究专项“海南农用地污染现状及修复技术研究(编号:2004DIB3J073)”;; 海南省作物栽培与耕作学重点学科及校基金(编号:Kyjj0613)资助。
【CateGory Index】: S158
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