黄土高原丘陵沟壑区放牧林草地土壤团聚体性质研究

许永霞; 廖超英; 孙长忠; 法蕾; 唐海滨; 边丹丹

许永霞,廖超英,孙长忠,法蕾,唐海滨,边丹丹.黄土高原丘陵沟壑区放牧林草地土壤团聚体性质研究[J].干旱地区农业研究,2011,29(5):186~191

黄土高原丘陵沟壑区放牧林草地土壤团聚体性质研究

Soil aggregate properties of grassland and forest during grazing in hilly and gully areas on the Loess Plateau

DOI：10.7606/j.issn.1000-7601.2011.05.34

英文关键词:soil aggregate content damage rete of aggregate large aggregate of dry sieve wet sieving large aggregates grazing ground

基金项目:国家自然科学基金项目（40171061）

作者	单位
许永霞	西北农林科技大学资源环境学院，陕西杨凌 712100；农业部黄土高原农业资源和环境修复重点开放实验室，陕西杨凌 712100
廖超英	西北农林科技大学资源环境学院，陕西杨凌 712100；农业部黄土高原农业资源和环境修复重点开放实验室，陕西杨凌 712100
孙长忠	中国林业科学研究院华北林业实验中心，北京 102300
法蕾	中国林业科学研究院华北林业实验中心，北京 102300
唐海滨	西北农林科技大学资源环境学院，陕西杨凌 712100；农业部黄土高原农业资源和环境修复重点开放实验室，陕西杨凌 712100
边丹丹	西北农林科技大学林学院，陕西杨凌 712100

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中文摘要:

通过放牧试验的方法，研究土壤团聚体含量和破坏率，以探讨不同放牧强度、不同放牧畜种、不同放牧植被类型条件下表土的团聚体(>0.25 mm)含量和破坏率。结果表明：放牧强度对土壤性质有影响，重度放牧下土壤团聚体含量最小；从畜牧羊种选择来看，绵羊相对于山羊来说对土壤结构破坏较小，土壤中团聚体含量较高；对于不同植被类型，放牧草地的土壤结构要比柠条林地的好。团聚体破坏率分析结果和团聚体含量分析结果基本一致。放牧强度、畜种和植被类型不同均影响着土壤表土的团聚体性质。

英文摘要:

With the method of grazing field experiment, we studied the aggregate content and damage rate of the soil, so as to analyze surface soil aggregate (>0.25 mm) content and damage rate of different grazing intensity, different types of livestock and different types of vegetation. The results show that grazing intensity has certain effect on surface soil structrue and soil aggregate content is the least at heavy grazing intensity. Compared with goat selected as grazing livestock, sheep has less effect on destroying soil structure and has large quantity of soil aggregate. Compared with Caragana korshinkii kom, grazing grassplot has better soil structure. The results of damage rete of ag gregate is consistent with that of soil aggregate content. So it is concluded that all categories of grazing intensity, types of livestock and types of vegetation affect the surface soil aggregate nature.

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