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本文以大豆‘合丰50’和‘垦丰16’为材料,喷施清水为对照(CK),在始花期(R1期)研究了叶面喷施烯效唑(S_(3307))和胺鲜酯(DTA-6)对大豆不同冠层叶片叶绿素含量、净光合速率(P_n)、蒸腾速率(T_r)、气孔导度(G_s)及产量的影响。结果表明:与CK相比,S_(3307)和DTA-6处理增加两品种大豆不同冠层的叶片叶绿素含量和净光合速率;S_(3307)和DTA-6处理主要增加鼓粒后期不同冠层的叶片蒸腾速率和气孔导度。在产量方面,S_(3307)和DTA-6处理显著增加了两品种大豆的单株荚数、单株粒数和百粒重;S_(3307)处理主要增加了上、下层产量贡献率,而DTA-6处理增加了上层产量贡献率。S_(3307)和DTA-6处理的2014年两品种产量比对照分别增加了1.39%、0.97%和12.59%、12.96%;2015年的产量比对照增加了15.44%、22.83%和30.63%、41.56%。综合分析表明,S_(3307)和DTA-6通过改善大豆不同冠层叶片的光合特性,延缓了叶片衰老,进而提高了大豆产量。
In this study, the effects of foliar spraying of uniconazole (S_ (3307)) and amines were studied at the initial flowering stage (R1 stage) with the materials of ’Hefeng 50’ and ’Kenfeng 16’ Effect of fresh ester (DTA-6) on chlorophyll content, net photosynthetic rate (P_n), transpiration rate (T_r), stomatal conductance (G_s) and yield of different canopy leaves of soybean. The results showed that S 3307 and DTA-6 increased leaf chlorophyll content and net photosynthetic rate of two varieties of canola compared with CK. S 3307 and DTA-6 increased the content of Cd Leaf transpiration rate and stomatal conductance. In the aspect of yield, S 3307 and DTA-6 significantly increased the pod number per plant, the number of grains per plant and the weight of 100 grains per plant; S 3307 increased the contribution of upper and lower yield, DTA-6 treatment increased the contribution of upper production. The yield of two varieties in 2014 and 2014 increased by 1.39%, 0.97% and 12.59% and 12.56% respectively compared with the control; the output in 2015 increased 15.44%, 22.83% and 30.63% respectively compared with the control, 41.56% %. Comprehensive analysis showed that S 3307 and DTA-6 delayed leaf senescence and improved soybean yield by improving the photosynthetic characteristics of different canopy leaves of soybean.