摘要
１９９４年～１９９６年选择岭东农区有代表性乡镇，同一品种，同一土壤生态条件，不同茬口的地块，在大豆不同生育时期定点、定期调查，结果表明：大豆重迎茬种植使产量分别降低３６．５６％和１８．９１％。使大豆根数，根瘤数、植株鲜重降低。单株生产力和粒重下降。重迎茬种植导致大豆苗期病虫害发生，使大豆根腐病增加１６１．０２％和１６８．６８％，根潜蝇被害率增加６５．７１％和４０．２％，大豆食心虫虫食率增加８０％和７７．３３％，对大豆中后期叶斑病的影响不大。
In 1994-1996,an investigation of the effects of rotation regimes on soybean growth and disease occurrence was conducted in Lindong agricultural area. The results were as follows :if soybean was repeatly planted in the second year or in the third year ,the yields decreased by 36.56% or by 18.91% respectively. The number of roots ,number of root nodules ,living plant weight also decreased. Seed yield per plant and 1000-seed weight decreased.Repeated planting caused more serious disease and insect damage at seeding period. Root rot disease increased 161.02% and 168.68%,root fly disease increased 65.71% and 40.2%. Soybean moth damage increased 80% and 77.33% ,for repeated planting in the second and third years. Soybean leafspot was not influenced by rotational planting regimes in mid and last period .
