摘要
选取滇池湖滨带沼泽土、冲积土、水稻土的三种类型土壤为研究对象,测定其理化性质,分析了引起三种土壤理化性质变化原因,并探讨了水田耕作和人为干扰对滇池湖滨带土壤的影响。研究结果表明:水田耕作使土壤肥力下降,土质变劣;水稻田施肥带来的面源污染,是引起富营养化和滇池湿地退化的潜在因素。修堤致使滇池水位变化,湖滨带冲积土淹于水下而形成人工湿地,冲积土壤有机质含量低,但速效磷、速效钾快速释放,有利种植水生植物。
Three types of soil samples from Dianchi Lakeside, including swampy soil, alluvial soil and paddy soil, were used in this paper to study the factors of changes in soil physical and chemical properties, as well as the effects of paddy fi eld tillage and human disturbance on coastal soil of Dianchi Lakeside by determining the soil physical and chemical properties. Results indicated that soil fertility tended to decline and soil quality was getting worse by paddy fi eld tillage. Non-point source pollution caused by paddy fertilizing was the potential element which could lead to eutrophication and wetland degradation of Dianchi Lake. Water level of Dianchi appeared to be changed by building dikes, and the coastal alluvial soil under the water became artifi cial wetland. There were low organic content in alluvial soil, but the aquatic plants were helped to grow due to the rapid release of available P and K in it.
出处
《林业建设》
2014年第3期19-22,共4页
Forestry Construction
关键词
沼泽土
冲积土
水稻土
土壤理化性质
Swampy soil
alluvial soil
paddy soil
soil physical and chemical properties
