摘要
对南洞庭湖区3类不同类型湿地土壤有机质及全氮的空间分布特征进行了研究.结果表明:3类湿地土壤养分差异较大,湿地表层土壤有机质和全氮含量从高到低依次为湖草滩地、芦苇滩地、泥沙滩地;土壤全氮与有机质呈极显著正相关关系(P<0.01),回归方程为y=0.093 1x-0.080 2(R2=0.943 5);土壤碳氮比都相对较低(4～9);湿地干湿交替周期、植被生长特征及pH值都是影响湿地土壤中有机质及全氮空间分布的因子.
The spatial distribution characteristics of soil organic matter and nitrogen in 3 types wetlands of South Dongting Lake Floodplain were studied in this paper. The results showed that there were both significant differences, of soil organic matter and nitrogen in 3 type wetlands, the horizontal distribution of soil organic matter and nitrogen was Carexspp-dominated floodplain Phragmites-dominated floodplain mud and sand-dominated floodplain. There were significant positive relationship（P 0.01）between soil organic matter and nitrogen, the regression equation was： y =50.093 1x-0.080 2 （R^2=0.943 5）.The ratios of carbon and nitrogen were relatively low. All the factors such as cycling of dry and wet, vegetation growth and pH values influenced the distribution of soil organic matter and nitrogen in wetland.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第10X期48-50,共3页
Journal of Hunan Agricultural University(Natural Sciences)
基金
湖南城市学院青年项目(07B011)
关键词
湿地
土壤有机质
氮素
空间分布
wetland
soil organic matter
nitrogen
spacial distribution
