陕北黄土高原坡耕地土壤养分特征研究

Soil Nutrient Characteristics of Slope Farmland in Loess Plateau

通过野外实地调查结合室内分析,研究了陕北黄土高原坡耕地土壤养分分布特征。结果表明：坡耕地土壤有机碳、速效磷、速效钾含量均值分别为13.33g·kg^-1,4.69mg·kg^-1和76.01mg·kg^-1。在0～40cm范围土层内,土壤有机碳、速效磷、速效钾含量均表现为表层含量最高,随着剖面深度的增加,养分含量越来越小。坡耕地中的有机质与速效钾含量中等,速效磷的含量总体偏低。

The distribution characteristics of soil organic carbon,available phosphorus and potassium in the slope farmland in the Loess Plateau of North Shanxi Province was researched.The experiments indicated that the mean of organic carbon,available phosphorus and potassium contents were 13.33g·kg^-1,4.69mg·kg^-1 and 76.01mg·kg^-1.In the 0-40cm soil layer,it showed the highest content in surface of soil organic carbon,available phosphorus and potassium,with the profile depth increased,nutrient content was getting lower and lower.The contents of soil organic and available potassium were medium level in slope farmland,while that of available phosphorus had lower content.