| 摘要 |
Using maize varieties including Zhengdan 958, Xianyu 335, Yudan 132, Xundan 20, Lianchuang 808, and Dingyou 163 as experimental materials, this study investigated the effects of two ethephon compound agents on the lodging resistance and yield of different maize varieties across various ecological regions. The results demonstrated that the lodging resistance of maize was significantly enhanced after the application of the two chemical control agents. Specifically, the lodging rate of Xundan 20 was reduced by 6.1 percentage points following treatment with benzylaminopurine (6-BA)·ethephon (ETH), while the lodging rate of Zhengdan 958 was decreased by 6.2 percentage points after treatment with diethyl aminoethyl hexanoate (DTA-6)·ETH. In the Shangqiu area, treatment of Lianchuang 808 with DTA-6·ETH reduced its ear height coefficient by 9.8 percentage points, whereas in the Zhumadian area, treatment of Dingyou 163 with 6-BA·ETH lowered its ear height coefficient by 11.3 percentage points. Additionally, both ethephon compound agents improved the stalk puncture strength of maize. For the same maize variety, phenotypic traits such as ear length, ear diameter, and number of kernel rows showed no significant differences under different chemical control treatments. However, traits including kernel number per row, 1 000-kernel weight, and yield exhibited significant variations across treatments and years. Moreover, the yield performance of maize varieties after chemical control treatment varied by region. In Hebi, Zhoukou, and Zhumadian areas, the yield under the DTA-6·ETH treatment surpassed that under the 6-BA·ETH treatment, with average yield increases of 4.22%, 8.41%, and 5.67% compared to the clear water control (CK), respectively. Conversely, in Shangqiu, Nanyang, and Changge areas, the 6-BA·ETH treatment outperformed DTA-6·ETH, resulting in average yield increases of 6.96%, 7.54%, and 5.56% relative to CK. |
