植物生长调节剂对寒地春玉米形态指标和产量的影响

Effect of Different Plant Growth Regulator on Morphological Index and Yield on Spring Maize in Cold Region

探讨了植物生长调节剂对寒地春玉米倒伏、秃尖和产量等的影响。以德美亚1号、德美玉338为试验材料,采用大田试验方法,以清水为对照(CK),不同浓度植物生长调节剂A和B为处理(1 125 m L·hm^(-2)、2 250 m L·hm^(-2)、3 375 m L·hm^(-2)),在玉米7叶期、10叶期进行叶面喷施。结果表明:喷施调节剂A、B不同程度的降低了玉米株高和穗位高等植株性状,增加茎粗,缩短穗位下节间长度,伸长穗位上节间长度,增加根系鲜重、干重、气生根层数和条数。提高了春玉米的抗倒伏能力及产量。综合表明以浓度为2 250 m L·hm^(-2)的调节剂B作用效果较好,可以显著提高春玉米产量。

Effect of different plant growth regulators on spring maize（Demeiya1 and Demeiyu338）lodging,baring and yield was studied in the seventh and tenth leaf of corn by foliar spray one time. Two chemical regulators,A and B（1 125 m L·hm^（-2）、2 250 m L·hm^（-2）、3 375 m L·hm^（-2））were tested with water as control. The results showed that,two regulators reduced plant height and ear position height,increased stem wide,shortened internode length under the ear,increased internode length on the ear,increased fresh and dry weight of maize root,increased aerial root layer of maize and aerial root number of maize,enhanced yield and profit in different degrees. Treatment with B（2 250 m L·hm^（-2））was better to improve the yield.