一、 2 0 0 4年国内玉米生产情况改革开放 2 0年来 ,我国玉米生产持续增长 ,到 1 998年 ,全国玉米播种面积已达到 2 5 2 3 9万hm2 ,占全国粮食作物播种面积的 2 2 3 % ,居粮食作物播种面积的第 3位 ;总产量达到 1 3 2 95 4万t,比 1 979年的60 0 4万t增加 1 2 1倍 ,平均每年 I. Domestic Corn Production in 2004 Since the reform and opening-up in 20 years, the corn production in China has been continuously increasing. By 1998, the sown area of ​​corn in the country has reached 252.39 million hm2, accounting for 2 of the sown area of ​​grain crops in the country 23% of the sown area of ​​food crops; the total output reached 132.54 million tons, an increase of 121 times over 60.4 million tons in 1979, with an average of