论文测定了高寒草甸20种牧草的粗蛋白、粗脂肪、粗灰分、无氮浸出物、粗纤维、钙和磷等8种营养成分,并利用关联度分析法综合评价了牧草品质的优劣.结果表明,早熟禾(γi=0.6294)、委陵菜(γi=0.6023)、圆穗蓼(γi=0.5826)及阿尔泰狗娃花(γi=0.5670)的加权关联度较高,是高寒退化草甸恢复重建的优良牧草；双子叶植物乳白香青(γi=0.6017)、黄帚橐吾(γi=0.6012)的加权关联度较高,其可作为青贮、舍饲牧草.相反,小嵩草(γi＝0.5282)、针茅(γi=0.5103)的加权关联度不高.这些研究表明,根据牧草的特点,分别利用是有效防治高寒草甸退化的重要方法.%The grey relevance analysis, by testing crude protein, crude fat, crude ash, nitrogen-free lixivium, coarse fiber, calcium and phosphorus, was used to evaluate natural pastures quality. The results showed that there were such high weighted grey relational degrees of Poaannua ( γi = 0. 6294), Potentilla aiscolor Bunge (γi = 0. 6023) , Polygonum macrophyllum D. Don = P. Sphaerostachum Meisn. (γi = 0. 5826) and Heteropappus altaicus novopokr(γi = 0. 5670) that these pastures were important for degraded recover of Alpine Meadow. Besides, the weighted incidence degrees indexes of Anaphalis lacteal and Ligu-laria virgaurea ( Maxim. ) Mattf ? Ex Rehd ? Etkobuski were 0. 6017 and 0. 6012 respectively, which were the best for silage and shelter feeding. But weighted grey relational degree of Kobresia pygmaea (γi = 0. 5282) as dominated pasture of Alpine Meadow was lower. These findings suggested that it was a good way to prevent degradation of Alpine Meadow on the basis of pastures feature.
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