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一、问题的提出 近年来,随着世界人口的增长,人们对从自然资源中获取维持自身生存的食物需求大幅度增长,粮食、土地、人口之间的矛盾日渐突出。据联合国粮农组织(FAO)统计,到本世纪未60亿以上的世界人口所需的农产品将比1980年多出50～60％,发展中国家要翻一番。假如继续采用传统耕作方式,发展中国家即使开垦所拥有的全部土地,也仅能勉强养活其预计的人口。然
First, the issue raised In recent years, as the world population growth, people from the natural resources to maintain their own food needs to maintain a substantial increase in food, land, population contradictions have become increasingly prominent. According to the UN Food and Agriculture Organization (FAO), the number of agricultural products needed by the world’s population of 6 billion or more will be 50-60% more than that of 1980 and the number of developing countries will double. If traditional farming methods continue, developing countries can barely feed their estimated population even if they have cultivated all their land. Of course