藻类结皮对黄土高原丘陵沟壑区土壤物理性状的影响  

Effects of Algal Crusts on Soil Physical Properties in Hilly and Gully Regions on the Loess Plateau

作　　者：王翠萍[1] 廖超英[1] 孙长忠[2] 田小雄[3] 吕建亮[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨陵712100 [2]中国林业科学研究院华北林业实验中心,北京102300 [3]水利部黄委会黄河上中游管理局规划设计院,陕西西安710021

出　　处：《西北林学院学报》2009年第3期41-45,共5页Journal of Northwest Forestry University

基　　金：国家自然科学基金项目(30670339)

摘　　要：通过野外采样和室内分析的方法，研究了山西偏关县不同厚度藻类结皮对土壤物理性状的影响。结果表明：藻类结皮直接影响土壤的物理结构，结皮形成后的土壤物理性质均优于无结皮（土壤）。随着结皮厚度的增加，土壤紧实度降低，容重下降，含水量上升，孔隙度增大，且3～7mm厚的藻类结皮对土壤容重、含水量和孔隙度的影响最大。Taking hilly-gully regions on the Loess Plateau in Pianguan, Shanxi Province as the research region, by representative field sampling investigation and laboratory analysis, the soil samples under different thickness of algal crusts in Chinese pine and abandoned land were collected, and their physical properties were analyzed, including soil bulk density, moisture and porosity （0 - 5 cm and 5 - 10 cm under crusts） were included. The results showed that algal crusts directly influenced soil physical structure. Soil physical properties of algal crusts cover were better than those of no algal crusts cover in studied areas. Soil bulk density decreased along with the increase of algal crusts thickness, while soil moisture and porosity increased. Algal crusts thickness of 3-7 mm had the greatest impact on the soil bulk density, soil moisture and soil porosity.

关 键 词：藻类结皮 土壤物理性状 黄土高原 丘陵沟壑区 

分 类 号：S714.2[农业科学—林学]