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以晋甜杂3号为材料,株高达到40、80、120cm时,分别喷施600、800、1 000mg/L浓度的烯效唑水溶剂。结果表明:喷施烯效唑可以有效降低甜高粱株高,在株高为80~120cm期间,600~800mg/L烯效唑处理均能显著降低甜高粱株高,而且并未因此而造成甜高粱鲜茎秆产量减少;在株高为80~120cm期间,800~1 000mg/L烯效唑处理茎粗较对照显著增加,但是在烯效唑处理浓度大于800mg/L后,处理茎粗增粗效应开始减弱;在株高为80~120cm期间处理时,甜高粱倒伏率较对照显著降低,株高达到120cm时,800和1 000mg/L烯效唑处理倒伏率较对照分别下降75.40%、83.02%。综合考虑,株高为120cm时喷施800mg/L烯效唑,甜高粱茎粗显著增加,株高显著降低,抗倒伏性增加,产量稳定,可以应用于生产实践中。
When Jintizaza No.3 was used as the material, when the plant height reached 40, 80 and 120cm, respectively, the concentration of 600, 800 and 1000mg / L were sprayed with the uniconazole water solvent. The results showed that spraying uniconazole could effectively reduce the plant height of sweet sorghum. Under the condition of 600 ~ 800 mg / L unimolol treatment, the plant height of sweet sorghum was significantly reduced at the plant height of 80 ~ 120 cm, but no sweet sorghum The sorghum fresh stalk production decreased. When the plant height was 80 ~ 120cm, the stem diameter of 800 ~ 1 000mg / L uniconazole treatment significantly increased compared with the control, but after the uniconazole treatment concentration was more than 800mg / L, When the plant height reached 120cm, the lodging rates of 800 and 1000mg / L uniconazole decreased by 75.40% compared with the control, respectively, 83.02%. Taken together, when the plant height was 120 cm, spraying 800mg / L uniconazole, sweet sorghum stem diameter increased significantly, plant height was significantly reduced, lodging resistance increased, the yield stable, can be applied to the production practice.