黄土高原不同利用类型废弃窑洞对土壤物理性质的影响

The effects of different discarded caves on the soil physical property on Loess Plateau

为了评价不同利用类型废弃窑洞复垦的适宜性,在甘肃省西峰区随机选取胡同式和靠崖式废弃窑洞样点6个,布设剖面15个,采集土样150个,以研究不同窑洞利用方式对土壤物理性质的影响.结果表明:不同窑洞利用方式对土壤质地没有明显的影响,但对土壤容重具有显著影响.土壤容重在窑洞利用过程中均显著增加,增加的幅度随土壤深度的增加而降低.两种废弃窑洞的土壤水分分布规律相似,均呈随土壤深度的增加而降低的趋势;但在土壤表层(小于20cm)的范围内,废弃窑洞的土壤水分含量明显高于对照;20cm以下的土层,废弃窑洞的土壤水分含量明显低于对照.建议废弃窑洞在土地复垦过程中,应采用恢复土壤结构、改变土壤孔隙性等有利于土壤利用天然降水的农艺措施.

In order to evaluate the reclamation suitablity and the soil physical property of different dis-carded caves,the 6 discarded alley and hillside caves,which included 15 soil profiles and 150 soil samples, were chosed by random selection .The results showed that the using type of caves had no significant effects on the soil texture,but had significant effects on the soil bulk density.The soil bulk density were signifi-cantly raised during the caves using,and the rising degree were reduced along with the depth of the soil. The distribution of the caves soil water were similar with the natural soil,but in the surface layer,the soil water of caves were higher than the same layer of natural soil,while under the surface layer,the soil water of caves were lower than the same layer of natural soil.It was suggested that agricultural measures should be used to improve soil constructure and porocity in the reclamation.