Study on the Application Effect of Plant Growth Regulators on Flax
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.
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