多效唑对高密度大豆生长发育的影响

以窄叶型品种中豆 2 9为材料 ,采用高密度种植方法 ,研究多效唑对大豆生长发育的影响。结果表明 ,密植时施用多效唑 ,大豆株高降低 ,花荚期根干重比例增加 ,茎干重比例下降 ,鼓粒期荚干重比例增加 ,有利于提高大豆产量。施用方法以在大豆花期叶面喷施 80mg/kg多效唑1～ 2次最好

Effects of PP333 on Growth and Development of High Density Planted Soybean

The split_plot experiment was conducted to study the effects of PP333 on the growth and development of narrow_leaf soybean variety_Zhongduo 29.The populations were planted in different density,and the liquid contained 80 mk/kg PP333 was sprinkled oh those populations in different growing periods.The results showed that leafing speed,knot number,100 seeds weight,dry weight of leaf,branch number and total pod number weren't changed significantly,but the height of plant and stem weight were decreased,weight ratio of root to stem in flowering period and perfectly developed seed number were increased,so a high yield could be expected. study on interaction between PP333 and population density showed that soybean yield was increased by sprinkling PP333 on high density population in flowering period.