黄土高原径流林业技术研究

以降水资源环境容量为基础控制林分密度,试验了不同集水技术对林地土壤水环境的改善作用,对林木生长的影响及集水技术的适用性.10年试验研究和大面积示范结果表明,在年降水量410mm左右地区造林,林地坡面经过不同的防渗处理,当每株树具有8m~2的集水面时,可使2m~2的植树带内收集到570～1270mm降水,造林成活率最高达到98%,林木生长量可提高40%～80%.

Technique for Runoff Forestry in the Loess Plateau

By controlling the density of trees according to environmental capacity of precipitation resource, the effects of different techniques for collecting water on improving moisture environment of forest land and on the growth of trees as well as their adaptation are experimented. After 10 years of experiment and technological spreading it is shown that in an area of 410mm precipitation per year,when anti-seepage technical treatments are taken on the slopes, and each tree has a water-collecting area of 8 m2, the forest belt of 2m2 can collect 570 to 1270 mm of rainfall, thus increase survival rate to 98% and increase tree growth by 40% to 80%.