摘要
研究了乌裕尔河湿地自然径流区和人为控制区各两个样带的土壤有机质、TN、TP在垂直于径流方向上的空间分异特征,结果表明在坡面径流和洪泛作用的影响下,表层土壤有机质、TN、TP表现出较高的空间异质性,在垂直于径流方向上呈现出累积-消减的趋势,0～15cm土壤累积-消减趋势明显大于15～30cm土壤,自然径流区的哈塔、龙安桥样带累积-消减趋势明显大于人为控制区的石家店、龙泡子样带,并应用空间输出/累积系数SEC进行量化和模拟, 讨论了不同的土壤养分类型、湿地水文情势随机性及缓冲带植被群落结构对土壤养分空间分异的影响.
The author has analysed spatial heterogeneous characters of soil organic matter, total nitrogen （TN）, total phosphorus （TP） in the vertical direction to wetland river in two sample belts in a natural runoff and a artificial management area, respectively. The results showed that soil organic matter, TN and TP put up high spatial heterogeneous characters and trend of cumulaion-subdution in surface layer under the effect of hillslope runoff and river inundation, and the soil organic matter, TN ,TP within 0-15cm layer had more clear trend of cumulaion-subdution than that within 15-30cm layer, meanwhile, the trend of cumulaion-subdution in Hata, Long anqiao sample areas in natural runoff area was more clear than in Shijiadian, Longpaozi sample areas in artificial management area. Index of spacial export/acumulation was applied to quantify the trend of acumutation-subdution of soil nutrients, and discusse the influence of different soil types, wetland hydrological regime and vegetation community characters in wetland buffering on the spatial heterogeneous characters of soil nutrients.
出处
《土壤通报》
CAS
CSCD
北大核心
2005年第6期831-835,共5页
Chinese Journal of Soil Science
基金
中科院知识创新重要项目(KZCXZ-SW-320-2)
关键词
湿地缓冲带
土壤养分
水文过程
空间分异
Wetlands buffering
Soil nutrients
Hydrological processes
Spatial heterogeneity
