河北省山地森林保土生态效益计量研究

Study on Conservative Ecological Benefits Calculating of Mountainous Forest in Hebei Province

该研究借鉴国内外森林保土效益研究的成功经验，结合河北省山地土壤流失特点，首次计算出了河北省山地森林年保土总量为６２６６．１５万ｔ；减少废弃土地面积９６４０．２４ｈｍ２，减少泥沙滞留１５９０．６４万ｍ３，减少泥沙淤积１１５６．８４万ｍ３，减少土壤有机质损失２７１．３２万ｔ，减少Ｎ、Ｐ、Ｋ损失１３０．２４万ｔ，经价值计算得出河北省山地森林年保土效益为３８．１５亿元，平均每年每ｈｍ２山地森林保土效益为１９５７．５元。

Based on the analysis of research on forest protecting soil in home and abroad,combining with the characteristics of soil runoff in Hebei Province,the datas were calculated.The soil conservated is 62 661.5 thousand t/a,the decrease of deserting land is 9 640.24 hm2,preventing of mud and sand 15 906.4 thousand m3,depositing mud and sand 11 568.4 thousand m3,the loss of soil organic matter 2 713.2 thousand tons,the loss of N,P and K 1 302.4 thousand tons.The total economic value is 3.815 billion Yuan,that means 1 957.5 Yuan/hm2.