内蒙古鄂尔多斯高原土地生产力的研究

Research on the Land Productivity in Ordos Plateau,Inner Mongolia

本文是在对内蒙古鄂尔多斯高原土地要素深入研究、以及对土地生产力与土壤肥力属性进行相关分析的基础上,对土地生产力的主要限制性因子—水分、土壤退化进行了研究。并把区域土地生产力与气候的干湿波动、土壤改良措施的实施相联系,进而揭示了本区未来土地生产力的波动变化趋势,提出了提高区域土地生产力的有效途径。

Based on the calculation of the land real productivity and the carring c- apacity. The relationship between the soil fertility natures and the land pr- oductivity is analysed in this paper. The result shows that the long-term o- verload of the land is the direct reason of the land degradation. Therefore, the number of the domestic animals should be controlled so as to suit the land productivity. The main obstacle factors of the present land productivity-the mean an- nual precipitation、the soil degradation are studied, and the land productivity in the future is estimated. The results show in the studied area, (1) The relative dry-periods are about 2000a, 2040a, and then the average value of the land productivity will decrease about 13.5%; (2) The relative wet-pe- riods are about 2020a、2080a, and then the average value of the land produ- ctivity will increase about 10.6%.