青海省都兰县天然草地资源生产力评价

青海省都兰县天然草地面积212.65万hm2,有荒漠草原类、山地草原类、高寒草原类、草原化荒漠类、干荒漠类、山地荒漠类、高寒草甸类、山地草甸类、沼泽类、高寒沼泽类、灌丛草甸类、疏林类草地12类。各类草地在全县的分布、面积和生产力各不相同:高寒草原类面积最大,为75.25万hm2,而山地草甸类面积最小,仅为273hm2;高寒沼泽类年生物量最高,平均产可食鲜草10791kg/hm2,高寒草原类年生物量最低,平均产可食鲜草1945kg/hm2。全县可利用草地155.42万hm2,可载畜140.94万个羊单位。

Evaluation on Productivity of Natural Grassland Resources in Dulan County of Qinghai Province

The natural grassland area in Dulan County of Qinghai Province was 2 126 500 hm2, and the natural grassland had 12 types including desert grassland, mountain grassland, alpine grassland, steppe-desert, dry desert, mountain desert, alpine meadow,mountain meadow, swamp, alpine swamp,shrub meadow, and open forest grassland. Various types of grassland had different distribution, area and productivity in this county. The alpine grassland had the largest area (752 500 hm2), while the mountain meadow had the small...