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我国草场面积辽阔,据中国科学院植物研究所1978年编制的1:250万比例尺《中国草场类型图》量算达400万平方公里,占国土面积的41％。但由于自然灾害及人为破坏,不少地区出现沙漠化和草场退化,生产力很低。按草场单位面积获得畜产品数量计算,仅为澳大利亚的1/10,美国的1/27。新中国成立以来,草原区进行过多次专业调查或综合考察。由于幅员广大,在一个区域内一次专业调查要花费几年或十几年的时间。调查周期过长致使资料现势性差,难以满足制定规划、指导生产的需要。目前我国为了长远经济建设,县级行
The area of grassland in our country is vast. According to the 1: 2.5 million scale “Chinese Type of Grassland Type Map” prepared by the Institute of Botany, Chinese Academy of Sciences in 1978, it amounts to 4 million square kilometers, accounting for 41% of the total land area. However, due to natural disasters and man-made damage, desertification and pasture degradation have occurred in many areas with low productivity. Calculated by the number of livestock products per unit area of the pasture, only 1/10 of Australia and 1/27 of the United States. Since the founding of new China, prairie areas have conducted many professional surveys or comprehensive inspection. Due to its size, a professional survey in a region can take years or ten years. The long period of investigation leads to the current situation of the data is poor, it is difficult to meet the needs of formulating plans and guiding production. At present, for long-term economic development in our country, the county level line