Abstract:

Wheat is one of the important food crops. Due to global warming and changes in farming patterns, wheat planting and production processes are facing frequent diseases, insects and weeds damage, which pose a major threat to wheat yield and quality. Plant growth regulators, as substances that control plant growth and improve yield and quality, have been widely used in crop production. However, there are relatively few studies on the application of plant growth regulators in wheat production through basal application. To explore the effects of different plant growth regulators on wheat seed germination, seedling growth and yield, this study selected three plant growth regulators of mepiquat chloride, choline chloride and diethyl aminoethyl hexanoate, and used the basal application method to study their effects on wheat. The results showed that the three plant growth regulators had significant (P≤0.05) effects on the germination potential and germination rate of wheat seeds, and had different promotion effects on the growth of wheat seedlings. When wheat was treated with 30 mg/L mepiquat chloride, 20 mg/L choline chloride and 4 mg/L diethyl aminoethyl hexanoate, plant height, root length, stem and leaf fresh weight and root fresh weight were significantly increased. Meanwhile, in the field experiment, the results showed that the treatment of wheat with 75 g (ai)/hm² mepiquat chloride, 30 g (ai)/hm² choline chloride and 30 g (ai)/hm² diethyl aminoethyl hexanoate had a significant effect on wheat seedlings, and the three plant growth regulators had different degrees of improvement on wheat yield.

Key words: plant growth regulators, wheat, mepiquat chloride, choline chloride, diethyl aminoethyl hexanoate, seed germination, seedling growth, yield