I also preliminarily studied human population, landscapes type of nature reserves to discuss suitable portion of strictly protected area in forests, grasslands, wetlands, desserts in China.
还提出研究中国自然保护区中人口、中国国土面积及分类和中国各种类型土地的适宜保护面积，探讨“在中国多大的国土面积可以建设为自然保护区?”
The nature reserves cover 5. 74 % of the total area in the Yangtze Basin, which is 1. 9 % lower than the overall mean rate in China.
长江流域的自然保护区占全流域面积的5． 74％，比我国自然保护区占国土面积的比例低1．9个百分点。
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