青海省泽库县草地资源特征及其退化与恢复

对青海泽库县草地资源及草地环境进行综合分析,认为由于受海拔的影响,气候寒冷,草地类型和草地植物以高寒类型为主;热量不足限制了牧草的生长和高产量的形成.自然因素和草地不合理利用、虫鼠害的交替作用,使近50%的草地已发生不同程度的退化."黑土滩"1982~1998年16年间增加了1.518×104hm2,平均每年增加近1 000hm2;鼠虫害危害面积为30.22×104hm2,损失牧草3.49×108kg,很大程度上影响了草地资源的可持续利用和草地环境的良性循环.此研究针对当地草地资源及草地环境现状,提出区域草地恢复的途径.

The characteristic and degeneration and resumed of grassland resources in Zeku County Ginghai Province

This paper is the analysis about the grassland resource and grassland environment in Zeku County Qinghai Province.The climate is cold because of the height above sea-level.The type of the grassland and the plants of the grassland are mainly belong to alpine type.The insufficient heat restricts the growth of herbage and to form the high yield.The unreasonable use,the natural factor and alternate function of the insect and mouse make about 50% of the grassland degenerated."Black-soil-type" grassland increased 1.518×10 hm2 in 16 years from 1982 to 1998,increaced nearly 1000 hm2 annually,the harmed area by the insect and mouse has reached 30.22×10 hm2,lossed forage reached 3.49×104 kg,all have in a great tend affected the sustainable use of the grassland and the well cycle of the grassland environment.According to the present situation of the grassland resource and the grassland environment,suggest some resume methods about the regional grassland.