What medicine can be sprayed on wheat to prevent freezing after winter?

Winter wheat grows for more than 200 days from sowing in cold dew solar terms to harvesting in solar terms. During the growth period of nearly 8 months, the temperature in winter is low, and early spring is prone to the danger of late spring cold. If it is rushed to a special year, China will form a meteorological "La Nina phenomenon", which will bring a more unfavorable side to the safe winter of wheat. In the management of winter wheat, if neglected, many friends choose to use potassium dihydrogen phosphate for foliar spraying. Indeed, potassium dihydrogen phosphate has the function of supplementing phosphorus and potassium, and has a good effect on enhancing the cold resistance and stress resistance of wheat. Everyone's choice is right. However, if some plant growth regulators are added to potassium dihydrogen phosphate, it will be more conducive to the growth of wheat, and the cold resistance and stress resistance of winter wheat will be enhanced a lot. What foliar fertilizer should be used to use potassium dihydrogen phosphate?

Potassium dihydrogen phosphate is a binary compound fertilizer, which is very common in production. In order to improve the use effect of potassium dihydrogen phosphate, potassium dihydrogen phosphate is generally compounded with other agents, for example, 0.3% potassium dihydrogen phosphate aqueous solution+brassinolide can be used. Or 0.3% potassium dihydrogen phosphate aqueous solution+Tianda 2 1 16 plant cell membrane stabilizer+aminomethyl ester.

Brassinolide is a new plant endogenous growth regulator, which can be quickly absorbed and utilized by winter wheat. When brassinolide is mixed with potassium dihydrogen phosphate, the cold tolerance of winter wheat can be obviously improved.

Amino methyl ester code (DA-6) has the advantages of quick response, low toxicity and good effect, and it will not cause phytotoxicity in normal use. Generally speaking, the combination of potassium dihydrogen phosphate and amino ester can obviously improve the growth quality of crops. Amino esters should not be mixed with alkaline pesticides, and there is little difference in function between amino esters and brassinolide. When you use it, you should remember that it cannot be used in combination with alkaline pesticides and fertilizers. You can usually see the effect by spraying it once. According to relevant introduction, after amino ester is absorbed by wheat, its efficacy can last for about three weeks in the body. After mixed spraying of potassium dihydrogen phosphate and aminoethyl ester, the cold tolerance of wheat seedlings was obviously stronger than that of seedlings without spraying in the field under sudden low temperature weather.

Winter wheat is sprayed with potassium dihydrogen phosphate+brassinolide+aminoethyl ester, usually once before winter. After the Spring Festival, the wheat seedlings enter the green period and need to be sprayed for the second time. After spraying, pesticides are quickly absorbed and transmitted to the whole wheat plant, which affects the development of wheat roots. Wheat has many strong roots, greatly increased ability to absorb fertilizer and water, dark green leaves and enhanced photosynthetic capacity, which can improve fertilizer utilization rate. More importantly, the liquid flow speed in the plant is accelerated, and the ability to resist freezing injury is obviously enhanced.

Some friends like to spray herbicides in order to save trouble and get twice the result with half the effort. Mixed herbicide, potassium dihydrogen phosphate, brassinolide, aminoethyl ester, etc. Personally, I think this effect is not as good as spraying 0.3% potassium dihydrogen phosphate+brassinolide on wheat seedlings after spraying herbicides, which can reduce the harm of herbicides and improve the freezing injury resistance of wheat.