黔中白云岩地区植被恢复困难地土壤的抗蚀性

通过野外调查结合室内分析的方法,对黔中白云岩地区不同植被恢复难度地区土壤抗蚀性进行了研究.结果表明,随着植被恢复难度减小,土壤物理性质逐渐改善,土壤容重表现为易恢复地＜中等困难恢复地＜难恢复地；易恢复地土壤孔隙状况明显好于难恢复地的孔隙状况,中等困难恢复地居中.土壤有机质含量为难恢复地＜易恢复地＜中等困难恢复地.植被恢复难度增加后,土壤团聚体稳定性降低,易导致土壤抗蚀性降低,土壤水稳性团聚体含量为易恢复地＞中等困难恢复地＞难恢复地,土壤分散系数为易恢复地＜中等困难恢复地＜难恢复地,土壤团聚度正好与之相反.

Anti-erodibility of Soil with Different Vegetation Restoration Difficulty Grades in Dolostone Area of Guizhou

Using the methods of field investigation and laboratory analysis,anti-erodibility of soil with different vegetation restoration difficulty grades in Guizhou dolostone area were researched.The results showed that the bulk density of soils increased while the porosity decreased with the increasing of vegetation restoration difficulty grades.The content of soil organic matter was the highest in middle restoration difficulty grades soils and lowest in high restoration difficulty grades soils.Besides,the content of water stability aggregates and the condensation degree decreased while the dispersion coefficient of soils increased with the increasing of restoration difficulty grades.Above all,soil anti-erodibility decreased when the restoration difficulty grade increased.