太行山区片麻岩裸地分类及其林业利用

THE CLASSIFICATION OF THE EXPOSED SLOPE LAND OF THE GNEISS AND ITS FORESTRY UTILIZATION IN THE TAIHANG MOUNTAINS

根据成土母岩的矿物构成、风化特性、风化层的保存状况和坡度,将太行山区裸露片麻岩坡地分为三类、七亚类和三个林业利用等级.提出了不同级别片麻岩裸地的最佳造林树种和林业利用途径.

The exposed slope land of the gneiss in the Taihang Mountains is classified into the three types and seven subtypes and further into three classes in the forestry utilization according to the mineral composition and the weathering characteristics of the soil-formation mother rocks and the conserving situation of the regolith and the slope,by means of the research about the result of the physical and chemical analysis of 312 samples of these weathering substances of 17 kinds of rocks and a wealth of data about the investigation in the open country. All of them are verified by the test of the suitable properties of different kinds of trees in every class of the exposed slope land of the gneiss. These testes have shown that above-mentioned classifications are correct by and large.Besides,the author shows the most suitable tree species in various exposed slope land of the gneiss in the Taihang Mountains.