“蜀南竹海”毛竹林土壤物理性质及其影响因子  

Physical properties and the impact factors on soil under the bamboo forest in the South Sichuan Bamboo Forests area

作　　者：高强伟[1] 罗承德[1] 代斌[1] 刘丽[1] 马丹[1] 

机构地区：[1]四川农业大学林学院,四川雅安625000

出　　处：《林业科技开发》2014年第3期52-55,共4页China Forestry Science and Technology

基　　金：四川省科技支撑项目(编号:2012ZZ0037)

摘　　要：以四川“蜀南竹海”毛竹林土壤为研究对象，探讨了土壤表层（0～20cm）和下层（20～40cm）的黏粒含量、密度、孔隙度、持水量的变异性，它们之间的相关关系以及海拔、土壤类型、枯落物厚度和土壤有机质对上述物理性质的影响。结果表明：研究区毛竹林土壤物理性质变异系数在10．28％～56．21％之间，属于中等变异性；总孔隙度、非毛管孔隙度、毛管持水量、最大持水量表层显著高于下层，而土壤密度表层显著低于下层；各土层物理因子之间有着密切关系，并且它们之间的相关关系基本不因土层差异而发生变化；海拔、枯落物厚度只对毛竹林表层土壤物理性质有显著影响，有机质对两土层土壤物理性质均有显著影响，而土壤类型只对两土层土壤密度、黏粒有显著影响。The soil clay content, bulk density, porosity, capacity of holding water of variability in the surface soil layer （0- 20 cm） and the deep soil layer （20-40 cm） and their correlations of soil under the bamboo forest in the Southern Sichuan Bamboo Forests area were studied, and the effects of altitude, soil type, litter depth and soil organic matter on the above mentioned properties were analyzed. The results showed that the soil physical properties variation coefficient was from 10.28% to 56.21% , which were the moderate variability. The total porosity, non-capillary porosity, capillary water capa- city and maximum moisture capacity in the surface soil layer （0-20 cm） was significantly higher than that in the deep soil layer （20-40 cm） , but the bulk density in the surface layer was significantly less than that in the deep layer. The physical factor between each layer presented the close relationship in the two layer, and basically this relationship didn＇ t change with the difference of the soil layer. The altitude and litter depth exerted the significant effects only on the properties in the surface layer, the organic matter significantly impacted on the soil physical properties in both layers. Meanwhile the soil type significantly influenced only on the bulk density and clay content in the two layer.

关 键 词：毛竹林 土壤物理性质 土层 相关关系 

分 类 号：S714.2[农业科学—林学]