Wheat is one of the important food products in China. However, wheat growth is a common phenomenon in wheat growth in recent years, which seriously affects the yield of wheat and causes serious economic losses to farmers. This article will lead everyone to learn about the harm of wheat and its prevention and treatment methods for your reference.
Wheat prosper
The biggest harm of wheat growth is the reduction of frost resistance. Because of the long growth, the wheat seedlings are tender and tender, the number of stems is large, the sugar content in the tillering section is insufficient, and the anti-freezing ability is greatly reduced. In particular, the winter-weak varieties are excessively prolonged, leading to accelerated differentiation of the panicles. Before wintering, they enter the two-edge period or even the spikelet and floret differentiation stages. It is possible that the wheat is completely frozen in winter, leading to extinction. The second major harm of Wang Chang is the large consumption of nutrients and water. The third is the reduction of stress resistance. Because of the prolonged growth, the seedlings grow thin, the population is large, the light transmission and ventilation are poor, and the drought resistance and resistance to pests and diseases are reduced.
Wheat different prolonged type control methods
1. The type of prosperous seed is too large. Generally speaking, the wheat planted before October 5, the seeding amount of the multi-panicle type is more than 18 kg/mu, and the sowing amount of the large panicle type is more than 23 kg/mu, which is basically because the seeding amount is too large. This type is characterized by crowded wheat and slender leaves. For the prevention and treatment of this type of wheat, in principle, thinning, deep-cultivation, and control of fertilizer should be adopted. If the growth is too strong, moderate suppression should be carried out. When suppressing, you should pay attention to one direction, and you should not repeatedly suppress it. If it is not treated in time, the wheat seedlings are crowded, the light transmission and the air permeability are poor, the wheat seedlings are tender, the wheat seedlings grow brightly, the young leaves grow rapidly, and a large amount of nutrients are supplied to the new leaves. The sugar stored in the tillering section is reduced, and the freezing resistance is greatly reduced. Even in the warm winter conditions, it is safe to winter, and the risk of lodging is increased in the coming year.
2. The type of fertilizer is too large. After the sowing period, after October 5, the seeding amount is moderate, but due to the excessive nitrogen fertilizer, the wheat seedlings are mad. In this case, the rooting or suppression should be taken in the middle of the cultivation, and the fertilizer should be moderately controlled.
3. The type of weak winter variety is prosperous. Because the winter and spring characteristics of the variety are very different, in general, the stronger the winter, the slower the development process before winter, the better the frost resistance. For some varieties with strong winter and weak spring, the development of the winter stalk has reached the two-edge period, even to the spikelet and florets differentiation period. Wheat entering the two-edge period before winter has a higher rate of wintering death.
Precautions for the control of wheat by chemical drugs: Some chemicals have a good control effect on wheat growth, such as paclobutrazol, which not only inhibits, but also has a certain effect on the prosperousness of frozen wheat. However, the use of chemicals to control the growth of wheat must be strictly in accordance with the instructions to control the concentration of pesticides, and the use of wheat should pay more attention to the developmental stage of wheat. Because these physiological regulators are different from pesticides, they are more sensitive to concentration and are particularly sensitive to such pesticides during the development of wheat ears. Once a phytotoxicity occurs, it is difficult to take an effective method to reverse it. Therefore, the use of these drugs should use a graduated cylinder and do not use the vial cap.
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