片麻岩山地整地前后土壤特性比较研究

Comparative Study on the Soil Properties of Site Preparation Before and After the Soil Preparation in Gneiss Mountainous Region

对河北太行山干旱片麻岩山地整地前后土壤特性进行了研究。结果表明:太行山片麻岩山地土层浅薄,而表层以下的半风化层其容重过大,孔隙度太小,植物根系无法下扎,土壤的持水能力极差是该地区草本可以生长很好,而乔木却无法存活的原因所在。整地使其土壤结构大为改善,容重由原来的1.86g/cm3减小到现在1.37g/cm3,孔隙度由原来的29.89%增大到现在的48.47%,土壤持水能力得到了成倍的增加;养分含量也有了一定的提高,为植物生长创造了一个适宜的土壤环境。

The soil properties of site preparation before and after the soil preparation in drought Gneiss mountain area in the Hebei Taihang Mountain were studied. The results showed that soil layer of Taihang Mountain gneiss mountainous was shallow,and the bulk density of half weathering below the surface was too large, the porosity was too small, plant roots couldn＇t deep down, soil water-holding ability was poor,which was the reason for that herbaceous plants could grow well, but the tree was unable to survive. After the soil preparation,the soil structure was improved,the bulk density was reduced from 1. 86 g/cm3 to 1.37 g/cm3 now,porosity by original 29. 89% increased to 48. 47% now, soil waterholding ability had been doubled ; nutrient content also increased. Preparation created a suitable soil environment for plant growing.