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一、问题的提出随着社会经济的不断发展,人民生活水平正日益提高,要求肉蛋奶等动物蛋白营养在人们食物结构中的比例不断提高,这就要求畜牧业必须大力发展。我国有13亿人口,占世界人口的20%多,而我国拥有的耕地面积仅为世界耕地的7%,用7%的耕地养活20%多的人口,粮食问题本身就十
First, the issue raised With the continuous development of social economy, the people’s living standards are increasing, requiring meat and eggs and other animal protein nutrition in the proportion of people’s food structure continues to rise, which requires the development of animal husbandry must be vigorously developed. China has a population of 1.3 billion, accounting for more than 20% of the world’s population. Our country owns only 7% of the world’s cultivated land. With 7% of the cultivated land feeding more than 20% of the population, the food issue itself is ten