青海天然草地产草量评价

THE EVALUATION OF QINGHAI NATURAL GRASSLAND PRODUCTIVITY

通过对青海省9个天然草地类产草量、可食饲草量及其在时间、空间分布差异分析,表明青海草地的主体是高寒类组草地,面积占全省天然草地总面积的85.83%,草地总产草量和可食产草量也占全省草地总产草量和可食产草量的85.54%和83.99%;近40年来,高寒草原类、高寒草甸类和温性荒漠草原类等3个草地类,出现了不同程度的退化趋势,其中退化最为明显的是高寒草甸类,其次是温性荒漠草原类,居第三位的是高寒草原类。从分布区域看,全省牧区6个藏族自治州可食饲草总量为206.06×108kg,占全省可食饲草总量的91.67%,表明青海藏区六州是青海天然草地的主要分布区域,是高寒类草地的主产区,也是青海草地畜牧业生产的基础所在。

By means of statistic analysis of the grass production, the edible grass production and these grass dis- tribution in time and space in 9 class grasslands, the results show below： the main type grassland belongs to the alpine type which makes up of 85.83% in the whole natural grasslands in Qinghai, the total grass production and the edible grass production respectively take up of 85.54% ,83.99% in total production of Qinghai natural grassland. In the last 40 years, the alpine steppe class, the alpine meadow class and the temperature desert steppe all show different degradation, the alpine meadow class, the temperature desert steppe class and the al- pine steppe class in orders. Form the view of the spatial distribution, the total edible grass production is 206.06 x 10Skg in the 6 tibetan prefectures,which occupy 91.67% of the total Qinghai province. The results prove that the main natural grassland distributes in the 6 tibetan prefectures in Qinghai province, and the alpine grasslands play the basic role in animal husbandry production.