摘要
通过中国高寒草地生产潜力及现实载畜状况分析 ,得出 : ①中国高寒草地气候生产潜力主要受降水因素制约 ; ②全区草地气候生产潜力平均为 6 56 8 6kg/hm2 ,草地生产潜力为 2 971 4kg/hm2 ,现实生产力仅 16 32 2kg/hm2 ,占草地生产潜力的 54 9% ,占草地气候生产潜力的 2 4 8% ,尚具有广阔的开发前景 ; ③中国高寒草地所能承载的最大理论载畜量为 14771× 10 4 只绵羊单位 ,适宜载畜量为 7932× 10 4 只绵羊单位 ,随着草地生产潜力的不断开发 ,适宜载畜量在 2 0 10年和 2 0 2 0年可望提高到目前的 1 4 6倍和 1 76倍 ; ④中国高寒草地目前整体处于超载状态 ,超载量高达 2 4 6 3 5× 10 4 只绵羊单位 ,超载率高达 2 8 6 % ; ⑤中国高寒区各类型区草地生产潜力及载畜状况差异颇大 ,应因地制宜 ,分类指导。
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.
出处
《资源科学》
CSSCI
CSCD
北大核心
2000年第4期72-77,共6页
Resources Science
基金
中国科学院重大及特别支持项目专题!"青藏高原环境变化与区域可持续发展研究"(KZ95 1-A1- 2 0 4-0 5 )
国家自然科学基金!(39770 43
关键词
中国
高塞草地
草地气候
生产潜力
载畜量
China'shigh\|frigid grassland
Climatic potential grassland productivity
Potential grassland productivity
Livestock carrying capacity
Overloading rate
