PROTECTION AND CONSTRUCTION OF GRASSLAND ENTIRONMENT IN QINGHAI LAKE

Qinghai lake drainage area lies in the northeast of the Qing-zang plateau.Land area is29661km2,natural grassland area is 213.65×104hm2,it is 72.03% of the total area,it is one of the important base of live-stocking production.Some control measures of returning field land to the grassland and so on are put out.