荷泽地区夏大豆亩产200公斤的生育规律研究

经田间试验,对不同产量水平大豆的生育动态进行比较,结果表明:黄淮流域夏播大豆,以选用生育期近100天,株形紧凑的中秆或矮秆品种,适当提高密度,较易获得200kg/亩以上的稳定高产。其株高、单株干重与叶面积增长积累动态,呈苗期较慢,花荚期开始转快,鼓粒期减缓的“S”形曲线,各转折点变化较小,曲线较平滑有利于高产。200kg/亩以上大豆的生物产量与粒/茎较高,在提高单株荚、粒数的基础上,百粒重对产量的贡献程度相对加强,较高的叶面积系数与干物质积累,尤其是鼓粒期间保持较高的光合势与群体干物质增长量,是取得200kg/亩以上产量的必要条件。

STUDIES ON THE GROWTH RHYTHM IN 200kg/mu. YIELD OF SUMMER SOYBEAN IN HEZE AREA

Results of the study of the growing tendency in different yield levels of soybean showed that: Using soybean varieties that having dwarf of semi-dwarf .compact-type and near 100 days of growing period and planting densely, were easily to get yield> 200kg/mu in Huang Huai River Valley summer sowing area. It's accumlative tendency of plant height, plant dry weight and LAI, were s-shaped curved. The more smooths growth curve during emergency stages at emergence to podding and seed-filling manifests soybean would be in high yield.Biological yield &. seed/stem ratio in yield level>200kg/mu, were larger than that in yield level and < 200kg/mu. Based on the singificant of pod per plant and 100 seed weight on the increase of yield, in yield level>200kg/mu such traits were higher in amount than in yield leve< 200kg/mu.Higher LAI &. dry weight of accumulation in days, were the essential factors on yield> 200kg/mu.