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采用田间小区试验,以高产玉米新品种登海661为材料,研究了拔节期叶面喷施10、20和40 mg.L-1的胺鲜酯(DA-6)对玉米叶片光合羧化酶、保护酶活性和产量的影响.结果表明:喷施胺鲜酯各处理玉米分别比对照(含有表面活性剂和水)增产10.0%(10 mg.L-1)、8.9%(20 mg.L-1)和9.4%(40 mg.L-1),增产效果显著,但各浓度间差异不显著.胺鲜酯处理后,花后玉米的叶面积指数、光合速率、RuBP羧化酶和PEP羧化酶活性均显著上升(P<0.05),且对光合速率、RuBP羧化酶和PEP羧化酶活性的影响随着处理浓度的增加而提高;与对照相比,胺鲜酯处理后吐丝期、灌浆期、乳熟期和蜡熟期叶片SOD、CAT、POD和GSTs活性及可溶性蛋白质含量显著提高(P<0.05),MDA含量显著降低(P<0.05),其中CAT活性随着处理浓度的增加呈上升趋势,其余生理指标各浓度间无显著性差异.
Field experiments were conducted to study the effects of DA-6 (10, 20 and 40 mg.L-1) on photosynthesis of maize leaf photosynthetic carboxylase , Protective enzyme activity and yield were studied.The results showed that the yield of maize increased by 10.0% (10 mg.L-1) and 8.9% (20 mg.L -1) compared with the control (with surfactant and water) -1) and 9.4% (40 mg.L-1), respectively, with a significant increase in yield, but no significant difference between the concentrations.After the treatment of amine fresh ester, the leaf area index, photosynthetic rate, RuBP carboxylase and PEP Carboxylase activity increased significantly (P <0.05), and the photosynthetic rate, RuBP carboxylase and PEP carboxylase activity increased with the increase of treatment concentration; compared with the control, The activity of SOD, CAT, POD and GSTs and the content of soluble protein in silt stage, grain filling stage, milky ripe stage and wax maturity stage were significantly increased (P <0.05), MDA content was significantly decreased (P <0.05) The increase of the concentration showed an upward trend, while the other physiological indexes had no significant difference among the concentrations.