Studies on Grassland Resource and Rational Utilization in the Upper Reaches of Minjiang River

In the upper reaches of Minjiang river, the natural cond1tion is complicated and the eco environmental type is multiplicity. There are 7 types of natural grassland. The area of grassland is 813 539hm 2 and makes up 32.9% of the total area. The livestock bearing capacity of natural grassland is 143.02×10 4 sheep unit. The amount of livestock on hand is 177.89×10 4 sheep unit in 1999.The overload rate is 24.4%.Overgrazing caused grassland degradation (poisonous grass is increased, the area of mouse and insect pest is enlarged, the grass coverage is decreased and the grass output is lowered.).Based on the characteristics of grassland and degraded status, proposed proposals to use grassland rationally:①strengthening planning of grassland use and management; ②carry out grassland contract system and three rights policy of grassland use;③adjust drove structure and control livestock amount;④heighten the rate of livestock off hand and develop seasonal stockbreeding;⑤improve natural grassland and father degraded grassland;⑥develop growing grassland, establish mowing and grass storing base, and heighten the ability of disaster resisting and livestock protection.