片麻岩裸地的治理与利用试验研究

Research on Harness and Utilization of Exposed Gneiss Slope Land

利用４ ａ 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。

Based on the experim entaldata for 4 years, the harness and utilization ofvariousexposed gneiss slope land are discussed, and the suitable kinds of trees and the gullyreclam ation in the area w hich exposed slope land of gneiss is distributed w idely are alsodiscussed. The results show : The condition w hich is suitable to the grow th of trees on theexposed slope land ofbiotite am phibole plagioclase gneiss is the best ofall, so it is suitableto develop the econom ic trees. The condition ofexposed slop land ofgranite gneiss is better,it can be used for soiland w ater conservation trees. The conditions ofexposed slope land ofgneiss syenite is the w orst of all, it can not be utilized directly, and should be set apartm ountains for afforestation. Besides, the effectofthe protection dam along the both sides ofgullies is better than the sand controldam across gullies in the gully reclam ation.