石漠化治理区不同生态恢复模式土壤质量评价

Evaluation on Soil Qualities of Different Ecological Restoration Models in Rocky Desertification Control Area

为研究贵州省喀斯特石漠化地区不同生态恢复模式土壤养分及土壤质量情况,以贵州省黔西南州贞丰—北盘江石漠化治理示范区为研究区,采用土壤质量综合指数法对花椒、金银花、核桃和撂荒地4种不同生态恢复模式下土壤质量进行了评价,分析了不同生态恢复模式下土壤理化和微生物指标的分布规律。结果表明:4种生态恢复模式下0—5 cm表层土壤养分富集明显,且20 cm土层内随着深度的加深,各营养指标总体呈下降趋势;与短年限撂荒地相比,花椒、金银花和核桃样地总体土壤物理性状较好,养分含量高,土壤微生物生物量明显改善。土壤质量综合指数花椒(0.671)>金银花(0.664)>核桃(0.597)>撂荒地(0.589),表明花椒、金银花对土壤质量提升成效较好,在石漠化治理土壤环境的改善中发挥了积极的作用。

In order to study soil nutrients and soil quality of different ecological restoration models in karst rocky desertification area of Guizhou Province,Zhenfeng-Beipanjiang River Demonstration Area of rocky desertification control in the Southwest Guizhou Autonomous Prefecture was chosen as the study area.Soil quality comprehensive index method was used to evaluate soil quality under four different ecological restoration models such as Zanthoxylum bungeanum,Lonicera japonica,Juglans regia and abandoned cropland.And the distribution of soil physical,chemical and microbial indicators under different ecological restoration models was analyzed.The results proved that the soil nutrient enrichment in 0—5 cm surface soil of the four ecological restoration model plots was obvious,and the overall nutrition index showed the downward trend with the increase of soil depth within 20 centimeters;compared with the abandoned land for a short period of time,the soil physical properties of fileds of Zanthoxylum bungeanum,Lonicera japonica and Juglans regia were better,the nutrient contents were higher,and the soil microbial biomass was significantly improved.The soil quality comprehensive index decreased in the order:Zanthoxylum bungeanum(0.671)>Lonicera japonica(0.664)>Juglans regia(0.597)>abandoned cropland(0.589),which indicates that Zanthoxylum bungeanum and Lonicera japonica have good effects on soil quality improvement,and play a positive role in improving soil environment in rocky desertification control.