水土保持研究2017，Vol.24Issue(4)：174-181,8.
山地丘陵区不同土地利用方式对空心村整治还田土壤团聚体特征的影响
Effects of Different Land Use Patterns on Characteristics of Soil Aggregates Under Vacancy Village Renovation in Hilly Areas
摘要
Abstract
To reveal the influence of the different ways of land use on soil aggregate,return the vacancy village renovation to improve the hilly area of soil stability and provide a scientific basis for production performance.After vacancy village renovation in hilly area of Chengcheng County in Shaanxi Province,five different ways of land use were set up,a period of one year of planting experiment,of corn (C),wheat (W),vegetables (V),medicinal herbs (M) and control (CK treatment) was conducted.Wet sieve method and dry sieve of 0-40 cm soil layer soil aggregate distribution,average quality diameter (WMD) and geometric mean diameter (GMD),aggregate damage rate (PAD),the number of unstable crumb (ELT) and fractal dimension (D) were analyzed.The results showed that:(1) soil aggregate quantity and size in each processing in 0-40 cm soil layer were significantly better than those of CK treatment,dry sieve ＞0.25 mm (DR0.25) and wetscreened aggregate content (WR0.25) with the increase of soil depth in 0-40 cm soil layer under various processing presented opposite trends;(2) soil mean weight diameters (MWD) and geometric mean diameters (GMD) measured by dry sieve and wet sieve method sin 0-40 cm soil layer of each treatment decreased in the order:W＞C＞M＞V＞CK,C treatment was conducive to increasing the aggregate content of surface soil,W treatment helps to increase the lower soil aggregate content;(3) wet sieve analysis showed that the soil aggregate unstable failure rate (PAD) and aggregate index (ELT) in 0-40 cm soil layer under each treatment showed'Z'shape,each treatment was significantly lower than CK;(4) average fractal dimension (D) in 0-40 cm soil layer of each treatment increased in the order:C＜W＜M＜V＜CK.there is a good linear relationship between soil fractal dimension (D) and＞0.25 mm aggregate contents determined by dry sieve method and wet sieve method in 0-40 cm soil layer,R2=0.74 and R2=0.67,respectively.Growing corn and wheat could improve soil aggregate content,increase soil stability,and improve soil structure in 0-40 cm soil layer after the vacancy village renovation.关键词
空心村/土壤团聚体/平均质量直径/几何平均直径/分形维数Key words
vacancy village/soil aggregate/mean weight diameters(MWD)/geometric mean diameter(GMD)/fractal dimension分类
农业科技引用本文复制引用
李娟,韩霁昌,陈超,李劲彬..山地丘陵区不同土地利用方式对空心村整治还田土壤团聚体特征的影响[J].水土保持研究,2017,24(4):174-181,8.基金项目
陕西省重点科技创新团队计划项目”退化及未利用土地整治”(2016KCT-23) （2016KCT-23）
