稻田中耕是我国水稻生产上一项传统的技术措施。但是,随着水田耕作制度的改变,复种指数的提高,水稻生育期的缩短,栽培条件的改善,以及科学技术的发展,有的人对稻田中耕的效果产生怀疑。因而,在这个问题上产生要中耕和不要中耕两种主张。前者认为:中耕的目的不仅是除草,还有改变水、土温度,改变土壤酸碱度,提高土壤透气性,增加土壤氨态氮的含量,促进新根生长以增强水稻吸肥能力,防止脱氮等。后者认为:中耕无非是解决杂草与水稻争肥、争水、争阳光的矛盾,中耕的目的就是除草,没有草就不需要中耕;中 Paddy field cultivation is a traditional technical measure on rice production in our country. However, with the change of paddy farming system, the improvement of multiple cropping index, the shortening of rice growth period, the improvement of cultivation conditions and the development of science and technology, some people have doubts about the effect of paddy field cultivation. Therefore, there are two kinds of claims on this issue, which are to cultivate and not to cultivate. The former thinks: the purpose of cultivating is not only weeding, but also changing water and soil temperature, changing soil pH, increasing soil permeability, increasing soil ammonia nitrogen content, promoting new root growth to enhance rice absorption ability, . The latter thinks that cultivating is nothing more than solving the contradiction between weeds and rice for fighting over fertilizer, fighting for water and fighting for sunshine. The purpose of cultivation is to weed out grass and no cultivation is needed without grass.