论文部分内容阅读
喀斯特地貌是对可溶性岩石(碳酸盐岩、石膏、岩盐)进行以化学溶蚀作用为主而形成的地貌。贵州省地处长江流域的上游,属典型的喀斯特侵蚀类型区,喀斯特面积为11万公顷,占全省国土总面积的62%,全省95%的县(市)都有喀斯特地貌分布,贵州省安顺市72%国土面积属喀斯特地貌。喀斯特山区土层浅薄、岩石裸露率高、土壤植被不连续、石砾含量高、土壤保水时间短,人工造林成活率低、保存率低、林木生长迟缓、植被恢复速度慢,不少地段长期处于疏林状态,表现出生态环境脆弱、环境容量小、抗外界干扰能力较低、受破坏后自我修复能力差等特征。今年,香樟被评选为安顺市市树,被大量用于义务植树和环城林带建设,现将喀斯特山区香樟造林技术简述如下:
Karst landform is formed by chemical dissolution of soluble rocks (carbonate, gypsum, rock salt). Guizhou Province is located in the upper reaches of the Yangtze River Basin, is a typical type of karst erosion area, Karst area of 110,000 hectares, accounting for 62% of the total land area of the province, 95% of the county (city) have karst landform distribution, Guizhou Province Anshun 72% of the land area belongs to karst landform. Karst mountainous area has shallow soil layers, high rock nakedness, discontinuous soil vegetation, high content of gravel, short water holding time of soil, low survival rate of afforestation, low preservation rate, slow growth of trees and slow recovery of vegetation, Sparse forest state, showing the fragile ecological environment, environmental capacity is small, less resistant to outside interference, self-repair ability after damage and other characteristics. This year, camphor tree was named Anshun City tree, was widely used for voluntary tree planting and urban belt construction, now Karst camphor afforestation technology is as follows: