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0 前言水稻是一种高产高能的粮食作物,在世界范围内,按单位面积产量居于首位。全世界水稻面积约为1.35亿公顷;在我国水稻是最重要的粮食作物之一,种植面积约为0.34亿公顷,约占粮食面积的1/3,产量却接近粮食总产量的1/2;在我区水稻面积约占粮食作物面积70%,而产量约占粮食总产80%以上;所以水稻产量不仅对于粮食总产,国计民生,而且在国际粮食竞争中有着举足轻重的作用。但是,我国水稻栽培,仍沿用传统的移栽水
0 Introduction Rice is a high-yield and high-energy food crop that ranks first in the world in terms of yield per unit area. The world’s rice area is about 135 million hectares. In our country, rice is one of the most important grain crops with an area of about 34 million hectares, accounting for about one-third of the total area of grain, but the output is close to 1/2 of the total grain output. In our district, the rice area accounts for about 70% of the total area of food crops and the output accounts for more than 80% of the total grain output. Therefore, the output of rice is not only important for the total output of grain, national economy and people’s livelihood, but also for the international food competition. However, China’s rice cultivation still uses traditional transplanting water