川中丘陵区防护林改良土壤作用研究

Studies on Soil Amelioration of the Protection Forests In the Hilly Areas of central Sichuan

本文研究了川中丘陵区不同防护林类型对土壤理化性质的影响。结果表明:不同防护林类型土壤的粘粒、物理性粘粒含量、土壤容重、土壤孔隙度、毛管水含量、田间持水量、田间有效持水量和每公顷土壤有效贮水量,土壤养分贮量和土壤速效养分供应量均比(对照地、标准地、有林地、未成造林地)高,防护林对土壤有明显的改良作用,其改良程度取决于森林植被的组成和结构,以及林种的配置状况。

Studies on soil physical and chemical properties of the protection froest types in the hilly areas of central Sichuan have shown that soil clay particle,physical clay particle content,bulk density,capillary moisture available reserved moisture,reserved nutrient content and available nutrient supplement in different protection forests are higher than those in CK(standard plots,fallow,forested area).Distinct amelioration effect of the protection forest types on the depends on soil compositions,structures and matching states of forest vegetation.The study will play an important role in leading to resume and rebuild the ecosystem of the soil erosious area.