文献类型：期刊文献

中文题名：土地利用方式对表层土壤水稳性团聚体的影响

英文题名：Effects of surface-layer soil water-stable aggregates under land use patterns

作者：韩新生[1,2] 马璠[1] 郭永忠[1] 蔡进军[1] 温淑红[1]

第一作者：韩新生

机构：[1]宁夏农林科学院荒漠化治理研究所宁夏防沙治沙与水土保持重点实验室;[2]中国林业科学研究院森林生态环境与保护研究所国家林业局森林生态环境重点实验室

年份：2018

卷号：32

期号：2

起止页码：114-120

中文期刊名：干旱区资源与环境

外文期刊名：Journal of Arid Land Resources and Environment

收录：北大核心:【北大核心2017】；CSSCI:【CSSCI2017_2018】；CSCD:【CSCD2017_2018】；

基金：宁夏自然科学基金项目(NZ15125;NZ15121);国家自然科学基金项目(41561058;41101268);宁夏农林科学院科技创新先导资金项目(NKYJ-17-12;NKYJ-15-19)资助

语种：中文

中文关键词：土地利用方式;土壤水稳性团聚体;平均重量直径;几何平均直径;分形维数

外文关键词：land use pattern; soil water- stable aggregate; mean weight diameter; geometric mean diameter;fractal dimension

分类号：S152.7

摘要：土壤团聚体是表征土壤结构稳定性和抗侵蚀能力的关键指标之一,是土地利用与土壤各因素相互作用的结果。为比较土地利用对土壤水稳性团聚体的影响,揭示不同土地利用方式下表层土壤结构的稳定性和抗侵蚀性规律,以黄土丘陵区五种土地利用类型为研究对象,采用湿筛法对土壤水稳性团聚体进行测定,使用平均重量直径、几何平均直径和分形维数等参数为指标,评价该区土壤的生态服务功能。研究结果表明:(1)表层土壤>0.106mm粒级的水稳性团聚体所占比例为53.83%;农地>1mm粒级所占比例最少,人工林所占比例最大;随着粒级减小水稳性团聚体变异系数呈现出逐渐变小的变化趋势。(2)土壤大团聚体所占比例的变化规律与>1mm的基本相同。(3)土壤水稳性团聚体的平均重量直径和几何平均直径的大小顺序都是人工林>撂荒地>人工草地>天然次生林>农地,且差异性显著;农地的质量分形维数值最大,人工林最小,且与其他三种土地利用方式差异性显著。(4)相关性分析表明:粒级>1mm的水稳性团聚体对土壤结构的稳定性起到很大作用。(5)综上所示:人工林的土壤结构最为良好,依次是撂荒地、人工草地和天然次生林,农地最差;粒级>1mm所占比例越高,土壤结构越稳定,抗侵蚀能力越强。
Soil aggregate is one of the key indicator of soil structure stability and anti-erosion ability,which is a product of interaction between land use and soil factors. To analyze and compare the effect of land use on soil water-stable aggregates,and reveal the stability and erosion-resistance of surface soil structure under different land use patterns,the five land use types in loess hilly region were studied by wet sieving method. Soil water-stable aggregates were measured,and the ecological service function of soil was evaluated by using the parameters of average weight diameter,geometric mean diameter and fractal dimension. The results showed that：（ 1）The proportion of water-stable aggregates in surface soil 0. 106 mm was 53. 83%; the proportion of that in farmland 1 mm was the smallest,and the proportion of that in plantation was the largest. The coefficient of variation of water-stable aggregates showed a decreasing tendency with the reduce of grain size.（ 2） The variation of proportion of soil macro-aggregates is basically the same as that of 1 mm.（ 3） The order of average weight diameter and geometric mean diameter of soil water-stable aggregates were plantation abandoned land artificial grassland natural secondary forest agricultural land,and the difference was significant. The fractal dimension of farmland quality was the largest and vegetation is the smallest.（ 4） Correlation analysis showed that water-stable aggregates with size 1 mm played a significant role in the stability of soil structure.（ 5） In summary,the soil structure of plantation was the best,followed by abandoned land,artificial grassland and natural secondary forest,and farmland was the worst. The higher the proportion of grain size 1 mm,the more stable of the soil structure.