POTENTIAL PRODUCTIVITY AND LIVESTOCK CARRYING CAPACITY OF HIGH-FRIGID GRASSLAND IN CHINA

Analysis of the potential productivity and livestock carrying situation in China's high\|frigid grassland (CHFG) facilitated drawing the following conclusions: 1)annual rainfall is the key factor limiting the climatic potential productivity of CHFG. 2)The climatic potential productivity of CHFG is 6 568\^6kg/hm\+2,and the grassland potential productivity is 2 971\^4kg/hm\+2,but the actual productivity is 1 632\^2kg/hm\+2 which is only 54\^9% of the grassland potential productivity and 24\^8% of the climatic one. This shows that there is a big room for developing grassland productivity. 3)The maximum theoretical livestock carrying capacity of the whole CHFG is 147\^71 million standard sheep and suitable carrying capacity is 79\^32 million. With continuous exploitation of the grassland potential productivity in the future,the suitable carrying capacity will increase by 1\^46 and 1\^76 times respectively for the years 2010 and 2020. 4)There exists an overloading of 24\^64 million sheep on CHFG at present,being as high as 28\^6%. 5)There is great difference in productivity and livestock carrying capacity in different types of CHFG,it is necessary to adopt measures suitable to different places.