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以先玉335为试验材料,研究了植物生长调节剂对玉米茎秆农艺性状及产量的影响。结果表明:在玉米7~10展叶期间,喷施调节剂降低了玉米植株的穗位高度,随着喷施时期的推迟,株高逐渐降低、穗位逐渐升高,调节剂影响的基部节位逐渐上移;穗位以下节间缩短、增粗、穿刺强度增强,茎秆干重逐渐增加,植株重心下降;穗位以上节间拉长明显,茎秆干重逐渐降低。植物生长调节剂的增产效果较为明显,在试验设计范围内,于8展叶时施用化控剂“玉多十”较为适宜。
Taking Xian Yu 335 as test material, the effects of plant growth regulators on the agronomic characters and yield of corn stalks were studied. The results showed that the spike height of maize plants was decreased by spraying the regulator during 7-10 leaves of maize. With the postponement of spraying period, the plant height decreased and the ear position gradually increased. The basal stems affected by the regulator The position below the ear position shortened, thicken, the puncture strength increased, the stalk dry weight increased gradually, the plant center of gravity decreased; spike bit above the internode elongation significantly, dry stalk weight gradually decreased. Plant growth regulators yield more obvious effect in the experimental design within the range of 8 leaves when the chemical control agent “Jade 10 ” is more appropriate.