都兰县天然草地资源调查报告

利用现场取样的方法,对都兰县天然草地进行了全面调查。结果表明,全县现有天然草地212.66×104hm2,有荒漠草原、山地草原、高寒草原、草原化荒漠、山地草甸、高寒沼泽、灌丛草甸、疏林类草场等共十二大类。各类草地在全县的分布、面积和生产力各不相同。其中,高寒草原类面积最大,为75.25×104hm2,山地草甸类面积最小,仅0.03×104hm2。高寒沼泽类年生物量最高,平均产可食鲜草5335kg/hm2。全县可利用草地155.42×104hm2,可载畜140.94万羊单位。草地生产力的限制因子主要是水分不足和鼠害,草地利用中存在的问题主要是夏、秋草场分配不合理,有的放牧过度,有的利用不足。提出解决了解决问题的建议和途径。

INVESTIGATION AND CLASSIFICATION ON NATIVE GRASSLAND RESOURCES IN LOUALAN COUNTY

The native grassland resources in Doulan County has been investigated and classified.The total area of grassland is 2.13million hm~2 consisting of 12 types such as alpine-grassland,alpine-meadow,alpine-steppe and alpine-desert.Each type of grassland varies in distribution,size and primary production,and of which,alpine-grassland is the largest one with the area of 752520 hm~2 while the alpine-meadow only 273hm~2.For the fresh yield,the highest type,alpine-moor,annually produce 5335kg/hm~2.They are1.55million hm~2 grassland available for feeding animals that can carrying 1.41million sheep units.The factors limiting productivity are lack of water,rats damage and rough management,and the author provide possible propositions and measures.