片麻岩裸地的治理与利用试验研究

利用４ａ的观测，试验资料对太行山区片麻岩裸地区的适生树种选择和沟道治理等问题进行了研究，在３种片麻岩裸地中，以黑云角闪斜长片麻岩裸地立地条件最好，适宜发展高效经济林；花岗片麻岩裸地次之，适宜发展水保林，片麻状花岗正长岩裸地立地条件最差，不宜直接开发利用，应以封山育林为主，在裸地区的沟道治理中，不宜采用横向谷坊坝，以纵向“护坡堤”为宜。

Research on Harness and Utilization of Exposed Gneiss Slope Land

Based on the experimental data for 4 years,the harness and utilization of various exposed gneiss slope land are discussed, and thesuitable kinds of trees and the gully reclamation in the area which exposed slope land ofgneiss is distributed widely are also discussed. The results show The condition which issuitable to the growth of trees on the exposed slope land ofbiotite-amphibole-plagioclase-gneiss is the best of all, so it is suitable to develop theeconomic trees. The condition of exposed slop land of granite-gneiss is better, it can beused for soil and water conservation trees.The conditions of exposed slope land ofgneiss-syenite is the worst of all, it can not be utilized directly, and should be setapart mountains for afforestation. Besides, the effect of the protection dam along theboth sides of gullies is better than the sand-control dam across gullies in the gullyreclamation.