秭归县退耕还林水源涵养效益计量  

Quantitative Evaluation on Water Conservation Benefit of Converting Land for Forest in Zigui County

作　　者：潘磊[1] 史玉虎[1] 熊艳平 王佐庆 向祖德 马德举 

机构地区：[1]湖北省林业科学研究院,武汉430079 [2]湖北省林业局,武汉430079 [3]湖北省秭归县林业局,宜昌412000

出　　处：《湖北林业科技》2006年第3期1-4,共4页Hubei Forestry Science and Technology

基　　金：国家林业局秭归退耕还林科技支撑项目;湖北省林业局森林生态监测项目部分内容。

摘　　要：林地是森林水源涵养效益的主体，通过对秭归县10种退耕还林模式的土壤物理性状和林地水源涵养效益的研究，结果表明：（1）退耕还林后土壤总孔隙度增加4．3％～20．2％，除柏木林外，非毛管孔隙度增加6．8％～494．2％；（2）退耕还林后土壤饱和蓄水量增加5．7％～118．8％，非毛管蓄水量为坡耕地的2．58～19．13倍；（3）秭归县退耕还林森林土壤的蓄水量为171．6万m^3／a，是相似立地条件下农耕地的3．21倍。Forestland is the principal part of forest to conserve water. The soil properties and water conservation function of 10 types of converting land for forest were studied in Zigui county, the results showed.. （1） The total soil porosity and non-capillary soil porosity increased from 4.3% to 20. 2% and 6.8% to 494. 2% respectively after converting land for green; （2） and the soll saturation water capacity increased from 5.7% to 118. 8%, the non-capillary water capacity was over 2.58-19.13 times to sloping field; （3）the soil capacity of converting land for green in Zigui county was 171.6 ten thousand m^3/a,it was 3.21 times to cultivated slope with similar site condition.

关 键 词：退耕还林 水源涵养效益 计量 坡耕地 蓄水量 

分 类 号：S727.2[农业科学—林木遗传育种] S791.27[农业科学—林学]