黄土高原南部土壤退化机理研究

黄土高原土壤侵蚀极其严重 ,这不仅导致了土壤生产力的降低 ,同时也导致了土壤的退化。本文在定位监测、室内分析及野外调查的基础上 ,研究了黄土高原南部土壤的退化机理。结果表明 :土壤中 <0 0 1mm颗粒和土壤养分流失是造成黄土高原土壤退化的主要原因 ,耕地土壤结构状况的恶化和土壤酶的流失使土壤退化程度进一步加剧 ,从而成为严重制约该区经济发展障碍。

Study on Soil Degeneration on Southern Plateau

The serious soil erosion of the Loess Plateau has led to n ot only the reduction of soil productivity but also the soil degeneration.The ar ticle makes a study on the mechanism of soil retrogression south of the Loess Pl ateau based on the site supervision,lab analysis and field survey.The results sh ow that the loss of particles less than 0.01 mm in soil and of nutrients are th e main factors which lead soil degeneration,soil structure deterioration and los s of soil enzyme activities that makes the soil degeneration more serious.The so il degeneration has become a main barrier obstructing the economical development of this area.