论文部分内容阅读
水稻是我国目前种植面积最大的粮食作物 ,每年种植面积约占粮食总播种面积的 30 % ,稻谷产量占粮食总产量的 45 %。我国是世界生产稻谷最多的国家 ,年总产量约占全世界稻谷总产量的 35 %。我国还是世界种植水稻历史最长的国家和栽培稻的主要起源之一。近几年 ,我国北方水稻因其
Rice is the largest grain crop currently planted in China. The annual planting area accounts for about 30% of the total sown area of grain and the output of rice accounts for 45% of the total grain output. China is the country with the largest rice production in the world and its annual output accounts for about 35% of the total rice output in the world. Our country is also one of the major origins of rice cultivation in the world with the longest history of rice cultivation. In recent years, China’s northern rice because of it