受粮食作物种植结构相对稳定、农民种植习惯和多年栽培技艺的影响,大豆重迎茬种植现象仍然没有从根本上消除,这给大豆生产造成了极大危害。据调查表明,重迎茬大豆与正茬的相比,株高降低5—17厘米,单株粒数减少16.1～20.8粒,百粒重降低1.4～2.3克,褐斑、紫斑、灰斑等病粒增加 Affected by the relatively stable planting structure of grain crops, planting habits of peasants and cultivation techniques for many years, the planting phenomenon of soybean by continuous cropping is still not fundamentally eliminated, which has caused great harm to soybean production. According to the survey showed that compared with the continuous cropped soybean crop, the plant height reduced 5-17 cm, grain number per plant decreased 16.1 to 20.8, 100 grain weight decreased 1.4 to 2.3 grams, brown spots, purple spots, gray spots, etc. Increased sick grain