乙烯利对春玉米生长发育及产量的影响

在抽雄前对玉米品种平安18(紧凑型)和四单19(平展型)喷施不同浓度的乙烯利,探讨其对株高、叶面积、干物重和产量的影响。结果表明,两个品种的株高均随着药剂浓度的增加而逐渐降低,但四单19的反应强于平安18。随着药剂浓度的增加,叶面积呈抛物线变化,干物重逐渐降低,但品种间略有差异。两个品种的产量都随着药剂浓度的增加而降低,随着种植密度的增加呈现抛物线变化。因此在喷洒低浓度乙烯利(150mL·hm-2)的情况下,适当增加密度(72665、58776株·hm-2)可以获得更好的产量。

Effect of ethephon on growth and yield of high-yield spring maize

Sprayed different concentration ethephon on maize varieties Ping’an 18 (the upright-leaf type) and Sidan 19 (horizontal-leaf type) before tasselling stage to discuss the influence of ethephon on plant height, leaf area, dry matter weight and yield. The results showed that plant height of Ping’an 18 and Sidan 19 decreased with the increasing of ethephon concentration, but the effect of ethephon on Sidan 19 was stronger than that on Ping’an 18. With the increasing of ethephon concentration, leaf area showed parabola change, and dry matter weight decreased gradually, but there was a little difference between two varieties. The kernel yield decreased gradually with the increasing of ethephon concentration, and showed parabola change with the increasing of plant density. Therefore, increasing density (72 665 plant·hm-2, 58 776 plant·hm-2) with spraying low concentration (150 mL·hm-2) ethephon will get a better maize kernel yield.