密植条件下春玉米茎叶性状对植物生长调节剂的响应

Response of Spring Maize Stem and Leaf Traits and Yield to Plant Growth Regulators under Dense Planting Condition

在吉林省东部湿润区,以高产潜力品种迪卡159为试材,研究了密植条件下玉米茎叶性状及产量对植物生长调节剂的响应,结果表明:植物生长调节剂能够降低玉米植株的株高、穗位高,缩短基部节间长度,减小单株叶面积,调整各层次的叶片分布,从而去除了植株茎秆和叶片冗余,重塑理想株型,保证了有效穗数,提高了穗粒数,最终达到了增产的目标。各处理中以在8展叶进行调节剂处理产量最高,且能够塑造中下部叶片大、上部叶片小的植株形态,有利于光能的获取和利用。

In the humid area of eastern Jilin Province, the response of maize stem and leaf traits and yield to plant growth regulators under dense planting conditions was studied using Dika 159, a variety with high yield potential, as the test material. The results showed that the plant growth regulator can reduce the plant height, ear of corn plant high, shorten the basal internode length, reduce the leaf area per plant, adjust the blade distribution of various levels, which in addition to the plant stem and leaf of redundant, reshape the ideal plant type, ensures the effective panicles, improves the spike grain number, finally achieving the target of production. Among all the treatments, the yield of the regulator treatment was the highest in the 8 spreading leaves, and the plant morphology with large leaves in the middle and lower leaves and small leaves in the upper leaves could be shaped, which was conducive to the acquisition and utilization of light energy.