黄土丘陵区小流域林业土地生产潜力研究

Study on Potential Productivity of Forestry Land in Huang Jiaercha Small Water Shed of Loess Hilly Area

黄土丘陵区小流域林业土地生产潜力研究＊王冬梅孙保平刘敬军关键词黄土丘陵区小流域土地生产潜力气候生产潜力现实生产潜力土地是由土壤、气候、地貌、岩石、植被和水文等因素组成的自然历史综合体，是一切生产和一切生物生存的源泉。长期以来，黄土高原由于人口数量的迅...

In this paper,potential forestry land productivity in Huang Jiaercha small water shed of loess hilly area is analyzed,based on the evaluation of land fitness.With the Thornthwait Memorial Model,the climatic potential capability of productivity of the water shed is calculated roughly. The results show that the climatic potential capability of productivity of arbor land is 12.75 m 3/(hm 2·a)and that of shrub land is 13 597.5 kg/(hm 2·a). The present potential capability of productivity of arbor land is 4.80 m 3/(hm 2·a) and that of shrub land is 8 197.5 kg/(hm 2·a) and is 38% and 60% of the climatic potential capability of productivity respectively. It is indicated that to plant shrub will make full use of the natural resources in the water shed and furthermore,amongst the shrub,planting Robinia pseudoaeacia is better. It must be of great significance to guide the current productive and comprehensive management of small water shed in loess hilly area.