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以密植中穗型品种辽单1211和稀植大穗型品种辽单120为试材,研究不同化控剂种类和喷施时期对玉米光合作用、形态指标和产量的影响。结果表明,喷施化控剂提高了玉米灌浆期穗位叶光合速率,9展叶期和12展叶期,在“吨田宝”化控剂处理下,辽单1211和辽单120穗位叶光合速率分别达到了最高值。和对照相比,喷施化控剂降低了玉米的株高和穗位高;喷施“康丰利”化控剂增加了辽单1211茎粗;喷施“吨田宝”缩短玉米的茎基部节间长度。产量结果表明,在9展叶期喷施“吨田宝”化控剂,可以显著地提高辽单1211产量;在6展叶期喷施“康丰利”化控剂,辽单120产量最高。
The effects of different chemical control agents and spraying period on the photosynthesis, morphological indexes and yield of maize were studied in the order of the dense-planting middle ear type Liaodian 1211 and the thin planting big ear type Liaodian 120. The results showed that the spraying chemical control agent increased the photosynthetic rate of ear leaf at grain filling stage, 9 leaf stage and 12 leaf stage at maize filling stage. Under the treatment of “Tian Tan Bao” chemical control agent, Liao Dan 1211 and Liao Dan 120 Spike leaf photosynthetic rate reached the highest value. Compared with the control, spraying chemical control agent reduced corn plant height and ear height; Spraying “Kang Fengli ” chemical control agent increased Liao Dan 1211 stem diameter; spraying Shorten the basal internode length of corn. The yield results showed that spraying “Tantangbao” chemical control agent at the 9-leaf stage could significantly increase the yield of Liaodong 1211; spraying “Kangfengli” chemical control agent at the 6-leaf stage, The highest single 120 production.