近几年来,由于生产责任制的落实,不少稻农有一种怕插秧稀了会减产的心理,因而插秧密度越来越大,行距由原来的10寸缩小到9寸甚至8寸,穴距由原来的1延长米10穴(即3寸穴距)增加到12—13穴(即2.5寸左右)。生产实践证明,密度过大不仅不利于增产,而且又增加了用种和用苗数量,增加了生产成本。据沈阳市苏家屯区1984和1985两年的大面积生产试验,采用9×4寸、9×5寸和9×6寸插秧密度,都比9×3寸增 In recent years, due to the implementation of production responsibility system, many rice farmers have a fear of planting thinning will reduce the psychological, so planting more and more density, spacing from 10 inches to 9 inches or even reduced to 8 inches, From the original 1 extension meter 10 holes (ie, 3 inch hole distance) increased to 12-13 points (ie 2.5 inches or so). Production practice has proved that excessive density is not conducive to increasing production, but also increased the number of species and seedlings used, an increase of production costs. According to the Shenyang Sujiatun 1984 and 1985 large-scale production test two years, using 9 × 4 inch, 9 × 5 inch and 9 × 6 inch transplanting density than 9 × 3 inch increase