化控剂对玉米光合作用、农艺性状和产量的影响

Effects of Chemical Regulators on Photosynthetic Characters,Agronomic Characters and Yield Characters of Maize

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。

Effects of different chemical regulators and spraying periods on photosynthesis, morphological index- es and yield of thick planting, medium ear-type hybrid maize Liaodan1211 and thin planting, big ear-type hybrid maize Liaodan120 were studied. The results showed that the photosynthetic rate of ear leaf was all significantly in- creased by spraying chemical regulators at the filling stage. Photosynthetic rate of ear leaf of Liaodan 1211 and Liao- dan120 reached the highest values by spraying ＂Dun Tianbao＂ at leafage 9 and 12 respectively. Compared with CK, plant height and ear height of maize were reduced by spraying chemical regulators. Stem diameter of Liaodan1211 was increased and internode length of that was shortened at ＂Kang Fengli＂ treatment, and internode length of maize was shortened at ＂Dun Tianbao＂ treatment. Results of yield cantly improved by spraying ＂Dun Tianbao＂ at leafage 9, ＂Kang Fengli＂ at leafage 12. data showed that the yield of Liaodan1211 was signifi- and Liaodanl20 reached the highest yield by spraying