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以化控剂“玉黄金”为种子处理剂,选用良玉188等6个玉米品种为材料,分析种子处理对玉米根冠关系及株型性状的影响。结果表明,不同玉米品种对化控剂种子处理的响应不同,化控剂种子处理有增加中胚轴长度的趋势,良玉188对化控剂种子处理最敏感;其次是禾玉3和迪卡516,其他3个品种未表现出差异。化控剂种子处理表现出较一致的增大根冠比效应。玉米株高和叶面积在不同生育期对化控剂种子处理的反应逐渐减弱,苗期和拔节期迪卡516和良玉188对化控剂处理的反应最敏感,降低株高的效应最强烈。化控剂种子处理对玉米下部节间长度的影响不显著,对穗位高度和穗位系数的影响有降低的趋势。
The effect of seed treatment on root-crown relationship and plant type traits of maize was analyzed with the chemical control agent “jade gold” as the seed treatment agent and 6 maize varieties including Liangyu 188 as the materials. The results showed that different maize cultivars had different response to chemical control agent seed treatment, chemical control agent seed treatment had the tendency to increase mesocotyl length, Liangyu 188 was the most sensitive to chemical control agent seed treatment, followed by Heyu 3 and Dika 516, the other three varieties showed no difference. Chemical control agent seed treatment showed a more consistent increase in root-shoot ratio effect. The responses of corn plant height and leaf area to chemical control agent seed treatment gradually weakened at different growth stages. The responses of seedlings and jointing stages Dika 516 and Liangyu 188 were the most sensitive to chemical control agents and the plant height was the most intensive. The effect of chemical control seed treatment on internode length of maize was insignificant, and the effect on ear height and ear coefficient decreased.