青海可可西里地区草地特征及评价

青海可可西里地区位于青藏高原腹地,自然景观保存完好,是基本上未被人类干扰的自然生态区域。该区土地辽阔,总面积831.37万hm~2,其中草地面积349.26万hm~2,占总面积的42.01％;生境条件恶劣,牧草低矮而稀疏,垫状成分增多;牧草盖度小,产量低.但营养价值高;草地类型单调,多为高寒草原和高寒草甸类,分布呈点、块、条状,不具连续性;草地平均鲜草产量784.2kg/hm~2,理论载畜量为80.33万只羊单位,可养74.21万只藏羚羊,或5.71万头野牦牛,或14.84万头藏野驴。

CHARACTERISTICS AND EVALUATION OF GRASSLAND IN KEKEXILI REGION OF QINGHAI

Kekexili region lies in the innerland of Qinghai-Tibetan plateau. The natural landscape is kept intact,and basically uninterfered by human activities. This region covers a vast area with 8.3171 million hm~2,of which the grassland occupied 3.4926 million hm~2,representing 42.01% of the total area. The habitat environment is adverse,and the grass short and sparse and mostly the mat components, The grass displays low coverage,low yield,but high nutritive values. The grassland type is monotonous, mainly the alpine grassland and alpine meadow types. The distrbution is spotted,patched,striped and uncontinuous. The average yield of fresh grass is 784.2kg/hm~2 and the theoretical stock capacity is 0.8033 million sheep units,being capable of feeding 0.7421 million of tibetan antelopes, 0.0571 million of wild yaks or 0.1484 million of wild tibetan donkeys respectively.