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以2个杂交大豆品种(杂交豆1号和杂交豆2号)以及同熟期组的2个常规品种(吉育72和吉林30)为试材,于2010~2011年通过盆栽和大田试验,分析不同时期品种根系发育形态、活力以及产量的差异。结果表明:杂交大豆比常规品种2年平均增产15.3%,分枝粒重显著增加;杂交大豆R2~R7期根系干重和体积显著增加,二者均在R5期有最大增幅;R2、R5和R7期杂交大豆平均主根长、一级侧根数和一级侧根总长较常规大豆增幅均达13%以上,并在R2期增幅最大;R2~R4期根瘤干重、根冠比及R2~R5期杂交大豆根系活力均显著增加;大田条件下,30~75 cm土层杂交大豆根系干重显著增加。生殖生长时期杂交大豆根系主根长、一级侧根数、一级侧根总长、根瘤干重、根系活力及深层次根系重量的强优势,保障强大的根系生物积累,为杂交大豆高产奠定了基础。
Two hybrid cultivars (hybrid bean No.1 and hybrid bean2) and two conventional cultivars (Jiyu72 and Jilin30) with the same maturity stage were used as experimental materials, and pot and field experiments were carried out from 2010 to 2011, Analysis of root morphology, vigor and yield differences in different periods of cultivars. The results showed that the average yield of hybrid soybean increased 15.3% and the branching weight increased significantly compared with the conventional varieties in two years. The dry weight and volume of hybrids increased significantly in R2 ~ R7, both of them had the largest increase in R5; R2, R5 and The average root length, primary root length and primary root length of R7 hybrid soybean increased by more than 13% compared with that of conventional soybean, and reached the largest increase in R2 phase. The root nodule dry weight, root / shoot ratio and R2 ~ R5 The root activity of hybrid soybean increased significantly. Under dry conditions, the dry weight of roots in 30 ~ 75 cm soil layer increased significantly. The main root length, primary root number, primary root length, root nodule dry weight, root activity and deep root weight of hybrid soybean in reproductive growth period have the strong advantages of strong root bioaccumulation and laid the foundation for the high yield of hybrid soybean.