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《Research of Soil and Water Conservation》 2009-03
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Soil Permeability Capability of Subalpine Coniferous Forests in Western Sichuan,China

HUO Xiao-peng,LI Xian-wei,ZHANG Jian,FAN Chuan,DAI Jie,ZHANG Xing-hua,ZHANG Liang-hui (Provincial Key Laboratory of Ecological Forestry Engineering,Sichuan Agricultural University,Ya'an,Sichuan 625014,China)  
The study on soil permeability of subalpine coniferous forests was carried out in western Sichuan,China.The results showed that:(1)In 0-30 cm soil layer,the non-capillary water capacity(NCWC) is affected strongly by soil bulk density,porosity and age of forests.The NCWC in natural forests ranged 593.7~694.2 t/hm2,and capacity sequence is 185 years80 years 40 years old.The NCWC ranged 175.8~545.1 t/hm2 in plantation forests,and the sequence is 40 years30 years 25 years 20 years old spruce.(2)The soil initial permeability rates of natural forests varied 10.6~30.1 mm/min,the highest one is 185 years old forests of fir;steady-state permeability rates ranged 3.3~6.4 mm/min,the highest one is 185 years old forests of fir.The IPR and SPR in plantation forests changed 2.7~8.3 mm/min and 1.9~5.4 mm/min respectively and the highest velocity of both is 40 years old forests of spruce.(3)Constructing soil permeability regression model and its fitting degree is 0.869~0.959,which shows that equation analog could reflect the process of each plots in this research.
【Fund】: 国家“十一五”科技支撑项目(2006BAC01A11);; 国家自然科学基金面上项目(30771717);; 教育部重点建设学科博士点基金(20050626001);; 四川省教育厅重点实验室项目(2006ZD006)
【CateGory Index】: S714
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