Abstract:

Delayed sowing time can easily lead to a yield decrease in wheat. In order to explore the effect of chemical seed dressing on the seedling strength and yield of late sowing wheat, ‘Huaimai 40’ was used as the experimental material, and four different chemical seed dressing treatments were set up to investigate and analyze the data of wheat growth quality, grain yield, and other aspects. The results showed that chemical seed dressing could improve the seedling rate of wheat, reduce the seedling height, increase leaf age, and promote root growth and biomass accumulation. The seed dressing could increase tillering and effective panicle number, enhance the proportion of large panicles, and improve grain yield. Compared with the control, Y₃ treatment promoted the seedling rate by 2.1%, reduced plant height by 11.9% before overwintering, increased leaf age by 16.4%, enhanced the width of the stem base by 58.2%, and increased the dry weight of the aboveground and root systems by 35.8% and 45.9%, respectively. The tillering ability was significantly enhanced, therefore the effective panicle number was increased by 12.4% with Y₃ treatment. The grain number and thousand grain weight per panicle were enhanced, and grain yield was increased by 19.4% with Y₃. In summary, Y₃ treatment can enhance the growth quality of wheat and achieve yield stability and increase under the condition of delayed sowing of wheat.

Key words: wheat, late sowing, seed dressing, seedling strength effect, yield