为探讨植物生长调节剂在胡麻生产中的应用效果，通过田间试验研究烯效唑和多效唑对现蕾期和盛花期胡麻生长、叶片生物酶活性及产量的影响，以期为胡麻化控栽培提供科学依据。结果表明，2种生长调节剂在胡麻现蕾期和盛花期分2次喷施均可以明显降低胡麻的株高和重心高度，明显增加茎粗，进而影响胡麻产量形成。4个喷施植物生长调节剂的处理在胡麻现蕾期和盛花期，与清水对照相比，平均株高降低15.09%和19.22%，平均重心高度降低10.47%和20.18%，平均鲜重降低7.73%和13.51%，平均茎粗增加7.69%和13.33%，且盛花期喷施的效应更加明显。现蕾期和盛花期不同处理间CAT含量、SOD含量、MDA含量均存在显著差异。随生育期的推进，CAT含量均呈明显下降趋势；SOD含量表现出不同的变化，喷施烯效唑处理和清水对照SOD含量均呈上升趋势，喷施多效唑处理均呈下降趋势；MDA含量均呈上升趋势。综上所述，喷施5%烯效唑可湿性粉剂1 995 g/hm2兑水450 kg和15%多效唑可湿性粉剂1 995 g/hm2兑水450 kg效果良好，能够在稳定产量的同时有效地增强抗倒伏能力

In order to explore the application effect of plant growth regulators in flax production, field experiments were conducted to study the effects of uniconazole and paclobutrazol on the growth, enzyme activity of leaves, and yield of flax during the budding and blooming stages, so as to provide a the oretical basis for the study of flax chemical control and high-yield cultivation. The results showed that two growth regulators applied twice during the budding and blooming stages of flax could significantly reduce the plant height and center of gravity height of flax, which could significantly increase stem diameter, and thus affect the formation of flax yield. During the two stages, when compared to the control with water sparying, the 4 treatments showed an average reduction of 15.09% to 19.22% in plant height, an average reduction of 10.47% to 20.18% in center of gravity height, an average decrease of 7.73% to 13.51% in flesh weight, and an average increase of 7.69% to 13.33% in stem diameter. Moreover, the effect of spraying during the peak flowering period was more significant. There were significant differences in CAT content, SOD content, and MDA content between different treatments during the two periods. As the growth progressed, the CAT content showed a significant downward trend, whereas the SOD content showed different changes, with both the uniconazole treatment and the control showing an upward trend, while the polyconazole treatment showed a downward trend. The MDA content showed an upward trend. In summary, under the conditions of this experiment, spraying 5% uniconazole wettable powder at a restrained dose of 1 995 g/ha diluted with 450 kg water and 15% polyconazole wettable powder at a restrained dose of 1 995 g/ha diluted with 450 kg water are the optimal spraying concentration, which can effectively enhance the lodging resistance of flax while stabilizing yield.

S565.9

国家现代农业产业技术体系(GARS-17-SYZ-6)；甘肃省农业科学院生物育种专项(2019GAAS05)。