黄土高原丘陵沟壑区放牧林草地团聚体水稳性的研究  

Study on Soil Water Stable Aggregate of Grassland and Forest Flood During Grazing in Hilly and Gully Regions on the Loess Plateau

作　　者：范春梅[1] 廖超英[1] 孙长忠[2] 许喜明[3] 刘恒柏[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]中国林科院华北林业实验中心,北京102300 [3]西北农林科技大学林学院,陕西杨凌712100

出　　处：《中国农学通报》2005年第11期399-401,429,共4页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金项目"黄土高原丘陵沟壑区放牧之生态环境效应规律研究"(40171061)。

摘　　要：以黄土高原丘陵沟壑区——山西偏关县为例,对不同放牧植被类型、不同放牧强度、不同放牧畜种条件下表层土(0-10cm)的团聚体水稳性进行分析研究。结果表明,放牧草地较之放牧林地的土壤结构及结构稳定性要好;重度放牧下土壤团聚体含量最小,其结构稳定性亦最差;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多、团聚体水稳性也较好。Based on hilly-gully regions on the Loess Plateau -Pianguan, Shaanxi province, to analyze surface （0-10cm） soil water stable aggregate content of grazing grassland and forest floor of different types of vegetation ,different types of livestock and different grazing intensity. The results showed that compared with woodland, grazing grassplot had better soil structure and structure stability, and soil aggregate content is least at heavy grazing intensity and also the soil structure stability is worst. Compared with goat selected as grazing livestock, sheep had less effect on destroying soil structure and had large quantity of soil aggregate; also the surface soil structure stability of the grazing land under sheep is better than under goat.

关 键 词：团聚体 水稳性 放牧林草地 黄土高原 丘陵沟壑区 

分 类 号：S792.116[农业科学—林木遗传育种] S152.4[农业科学—林学]