(一)近年来我国大豆生产徘徊不前新中国成立50年来,我国大豆生产经历了一个漫长的徘徊式的发展过程,主要有两个显著特点:一是大豆单产提高幅度远远低于玉米、小麦和水稻等粮食作物,综合生产能力提高比较缓慢;二是虽然总产量由500万吨增加到1500万吨左右,但由于需求增长更快,导致进口急剧增加。 (I) Soybean production in China has stagnated in recent years In the 50 years since the founding of new China, soybean production in our country has undergone a long and vorticity development. There are mainly two notable features: First, the yield of soybean yields is much lower than that of corn, Second, although the total output has increased from 5 million tons to 15 million tons, the rapid increase in demand has led to a sharp increase in the import of food crops such as wheat and rice.