Experimental Study of Degenerated Grassland Improvement in Alpine Area.

Alpine grassland is importental grassland resource in China. Experimental study on improvement of Alpine grassland was conducted. According to the result, the best effect was achived by applying fertilizer, and increasing proportion of fine herbages in the grassland. Grasses, legumes and nutgrasses increased 9.02%～10.17% per、18.40%～27.76% and -6.57%～1.87%, respectively, compared with CK. The second effect is fenced pastures. The proportions of the grasses and legumes possessing in the grassland increased 26.81%～39.85% and 20.74%～37.85%, respectively, when compared with CK. Nutgrasses decreased 11.85%～19.23% than CK. The third effect is trenching, the proportion of the grasses and legumes and nutgrasses increased 18.17%～23.86% and 19.85%～48.10%, nutgrasses decreased 4.70%～8.92%, respectively, when compared with CK.