坡面侵蚀土壤磁化率变化机理的研究  

Mechanism of Slop Soil Eroded Susceptibility Change

作　　者：董元杰[1] 马玉增[1] 陈为峰 史衍玺[2,1] 

机构地区：[1]山东农业大学资源与环境学院,山东泰安271018 [2]莱阳农学院资源与环境学院,山东青岛266109

出　　处：《土壤通报》2008年第6期1400-1403,共4页Chinese Journal of Soil Science

基　　金：国家自然科学基金(40701094);山东省教育厅科技计划项目(JO7YF10);山东农业大学青年科技创新基金(23457)

摘　　要：研究了土壤磁化率与土壤物理性质的关系,结果表明:应用干筛法在不同粒级土团中获得的0.1～0.25mm粒级的土团主导土壤的磁化率,各组分土团中大于0.1mm的组分磁化率与粒径呈反相关,小于0.1mm的组分磁化率与粒径呈正相关。土壤比重、土壤总孔隙度、崩解速率等均与土壤磁化率呈负相关,且土壤崩解速率与土壤磁化率呈极显著负相关;土壤磁化率与容重、粒径小于0.25mm的水稳性团粒组分和大于0.05mm的机械组分含量呈显著正相关。坡面土壤侵蚀导致坡面物质发生再分布,使得土壤颗粒组成、容重、比重、孔隙度等土壤物理性质发生变化,进而使得坡面不同空间部位土壤磁化率出现差异。The relationship between soil susceptibility and the soil physical and chemical character/stics was studied. The results showed that the content of soil grain size （0.1-0.25 ram） was positive correlation with soil susceptibility, which means the soil size （0.1-0.25 mm） controlled the soil susceptibility. Soil specific gravity, soil porosity and soil collapse speed were negative correlation with soil susceptibility. Soil bulk specific gravity was positive correlation with soil susceptibility.The mechanism of soil susceptibility variation is that soil erosion make the soil redistribution in the slope, and the soil physical changed at the same time. Then the soil susceptibility changed too.

关 键 词：皮面 土壤物理性质 土壤磁化率 

分 类 号：S157.1[农业科学—土壤学] S153.2[农业科学—农业基础科学]