1生产情况1.1世界大豆生产概况世界大豆生产主要集中在美国、巴西、阿根廷和中国4个国家,上述4国大豆播种面积占世界总播种面积80%以上,总产约占90%。最近20年,这4个国家的产量比例发生了巨大变化,20年前美国的产量占世界总产量的64%,巴西占16%,中国占10%,阿根廷占5%。20世纪90 1 Production 1.1 Overview of world soybean production The world soybean production is mainly concentrated in the United States, Brazil, Argentina and China. The planting area of ​​the above four countries accounts for more than 80% of the world sown area and the total output is about 90%. In the last 20 years, the proportions of these four countries have undergone tremendous changes. Two decades ago, the United States accounted for 64% of the world’s total output, Brazil accounted for 16%, China 10% and Argentina 5%. 20th century 90