水蚀风蚀区六道沟流域不同土地利用方式下养分特征

Characteristics of soil nutrients under different land use types in Liudaogou watershed of water and wind erosion area

利用经典统计与地统计学相结合的方法,以六道沟流域农用地、林地和草地三种土地类型为研究对象,测定各不同利用方式下土壤有机质、全氮、全磷、全钾、速效氮、速效磷、速效钾、C/N值八种养分指标。结果表明,土壤有机质、全氮含量表现为农用地>林地>草地,全磷含量表现为农用地>草地>林地,土壤全钾含量表现为草地>林地>农用地,速效氮含量表现为农用地>草地>林地,速效磷表现为农用地>林地>草地,速效钾表现为林地>农用地>草地;土壤C/N值表现为林地>草地>农用地;有机质含量与全氮含量呈线性关系,且均达极显著水平(P<0.01)。结果说明不同土地利用方式对土壤养分含量有重要影响。

A study was carried out on the characteristics of soil nutrients under three land use types of farmland,forest and grassland in Liudaogou watershed by using traditional statistics combined with geo-statistics.The result showed that soil organic matter content was farmlandforestgrassland,soil total N content was farm-landforestgrassland,soil total K was grasslandforestfarmland,available nitrogen content was farmlandforestgrassland,available P was farmland forestgrassland,available potassium was forestfarmlandgrassland;soil C/N was forestgrasslandfarmland;It showed a linear relationship between organic matter content and total nitrogen content,and reached a significant level（P0.01）.Different land use types had important influences on soil nutrient content.