Although wheat is a closed-pollinated crop, it has been pollinated since flowering. However, we must grasp one key point. A piece of wheat will not bloom at the same time, some are fast and some are slow. If pesticides are applied during flowering, some wheat plants may not bloom and pollinate. If the pesticide is applied at this time, some flowering and pollinating wheat plants may have broken their pollen after absorbing the liquid medicine. Therefore, it is not recommended to apply pesticides at the flowering stage of Populus davidiana.
Once wheat pollination is affected, it will directly affect the number of grains per spike. Generally, the fewer grains per panicle, the lower the yield. In addition, it may also affect the normal filling of wheat, leading to an increase in the number of grains per ear and a decrease in the 1000-grain weight, which indicates a reduction in production.
Wheat sowing technology
The key is to control the time point of wheat sowing. The germination and growth of wheat after sowing have a fixed cycle, so it is necessary to ensure that wheat can grow in a suitable climate at different stages. Early sowing will lead to excessive growth of seedlings and excessive absorption of nutrients, which will easily lead to frequent pests and diseases.
If the sowing time is late, the growth rate of seedlings will be reduced. The time of wheat planting needs to be determined according to the regional climate and seasonal characteristics. In Shandong, wheat planting is generally carried out in 65438+ 10. Wheat sowing technology also includes the control of sowing methods. Now the wheat planting in Shandong Province has entered the mechanized mode, and the row spacing, depth and density can be reasonably controlled when planting.