论文部分内容阅读
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 successful experience of the research on the effectiveness of forest soil conservation at home and abroad, this study combined the characteristics of mountainous soil erosion in Hebei Province for the first time, and calculated for the first time that the total amount of annual soil conservation in mountainous forests in Hebei Province was 62,661,500 tons, and the land area for waste reduction was 9640.24hm2, Reduce the retention of sediment 15,906,400 m3, reduce the sediment deposition 11,568,400 m3, reduce the loss of soil organic matter 2,713,200 tons, reduce N, P, K loss of 1,324,400 tons, calculated by the value of Hebei Province Annual benefits of mountain forest soil conservation 38.5 billion yuan, the average annual per hm2 mountain forest soil benefit 1957.5 yuan.