高寒草甸主要乡土牧草营养成分的灰色关联综合评价及利用潜力

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。

Grey Relevance Analysis and Utilization Potential on Natural Pastures Nutrient Constituent of Alpine Meadow

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 H eteropappus 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.