重庆市大部分地区气候温热,四季分明,无霜期长,适宜采取多熟制种植。据研究表明,以稻—麦轮作为代表的水旱轮作免(少)耕技术具有充分利用耕地、培肥地力、熟化土壤、减少病虫害的优点,可以最大限度地提高全年单位耕地粮食产量,适宜在重庆 In most parts of Chongqing, the climate is warm with four seasons and a long frost-free period, so it is suitable to adopt multi-cropping system. According to the research, the crop rotation and harvesting (less) cultivation techniques represented by rice-wheat rotation have the advantages of fully utilizing arable land, fertilizing soil, curing soil and reducing pests and diseases, and can maximize grain yield per unit of cultivated land per year, Suitable in Chongqing