岩溶山区石漠化生态治理的土壤质量效应研究:以贵州省花江峡谷石漠化治理示范区为例

Study on Soil Quality Effect in Ecological Management of Rocky Desertification in Karst Mountainous Area:A case study of Huajiang canyon demonstration area of Guizhou province

以贵州省花江峡谷石漠化治理示范区为研究单元,对比分析了小流域2005年和2009年生态治理下的土壤理化性质。结果表明:与2005年相比,2009年土壤理化性质的变异系数、总孔隙度、毛管孔隙度和毛管持水量下降,非毛管孔隙度与田间持水量明显提高。说明,生态治理促使土壤理化性质的空间变异程度降低,土壤的孔隙结构更加合理,土壤既有较好的持水能力,又有较好的通气透水性能;土壤有机质含量变化不明显,土壤有机营养元素全氮和全磷含量明显增加,全钾含量则降低,土壤pH值略微降低。表明,在研究区石漠化生态措施治理下,土壤质量及生态环境均得到有效改善。

Soil physiochemical properties under ecological management were compared and analyzed in the watershed based on Guizhou Huajiang canyon rocky demonstration area from 2005 to 2009. The results showed that compared with 2005, the coefficient of variation, total porosity, capillary porosity, and capillary water capacity of soil physiochemical properties reduced, while non-capillary capacity and field moisture capacity increased in 2009. It indicated that ecological management decreased the spatial variation of soil physiochemical property, water holding capacity, but also soil porosity structure became more reasonable, soil not only had better with better aeration and permeability. There was no significant change of soil organic matter （OM）, total N and total P increased obviously, but K decreased, pH decreased slightly. All the data indicated that soil quality and environment were improved under the ecological management of rocky desertification in the mountainous Karst area.