Analysis on Returning Land for Farming to Forestry and Grass Planting and Food Security in Guyuan District, Ningxia Hui Autonomous Region

作者 LI Rong; MI Wenbao

期刊 Arid Zone Research , 2007,1:24

摘要 Soil erosion is serious in the loess hilly-gully region of Guyuan District, Ningxia Hui Autonomous Region, the modulus of soil erosion in the district varies in a range of 5 000- 7 500 t· km~- 2·a~(-1), and the gully density is 1.33-4.0 km·km~(-2). Thus, soil erosion becomes more and more serious, the soil fertility is decreased, and the grain production and the sustainable economic development are restrieted. Considering from ecological seeurity, in this paper the prewaming system for food security in Yuanzhou District is developed based on the indexes of minimum area of cultivated land per capita and farmland pressure. After analyzing the situation of food security, it is considered that Touying Town and Heieheng Town belong to the dangerous area, Pengpu Town belongs to the cautionary area, and other townships and towns belong to the safe area. Based on the conditions of natural resources and the existing problems of all the townships and towns, some measures are put forward for implementing the project of returning land for farming to forestry and grass planting. For the safe area, it is suggested to promote the intensified exploitation of natural resources so as to？ achieve the harmonious development of self-supply production and commercial production; for the cautionary area, it is suggested to reduce the area of returning land for farming to forestry and grass planting, and the policy of increasing crop yield and developing economy should be taken; for the dangerous area, the project of returning land for farming to forestry and grass planting should be implemented step by step.