Freeze-damaged rice, corn, soybeans, the most complete remedial measures!

In the early stage, there was low temperature and heavy rain in our province, and snow fell in some areas at the same time, resulting in varying degrees of frost damage to crops in different areas. in order to let farmers reduce losses, we have sorted out remedial measures for the freezing injury of some crops for your reference.

"what about the freezing injury of rice?"

After the rice seedlings are frozen, if the rice seedlings are not properly managed and protected, not only the growth of the seedlings can not be restored quickly, but the death of the seedlings will be accelerated, so the following techniques should be taken to manage and protect the frozen seedlings:

1. Irrigate and protect seedlings. The root absorption capacity of frozen seedlings is poor, and the leaf transpiration increases after the weather clears up. At this time, if the seedlings are short of water and can not make ends meet, it is very easy to lead to the rapid death of seedlings. Therefore, the newly frozen seedlings should be irrigated to protect the seedlings in sunny days, and then transferred to normal water management after the seedlings have fully recovered.

two。 Spray foliar fertilizer. Foliar fertilizer was sprayed on the seedlings with lighter freezing to speed up the seedling recovery and promote the seedling growth. The roots of frozen seedlings with slow application of chemical fertilizer were destroyed, and urea was applied immediately after the weather cleared, which not only could not be absorbed by the roots, but also burned to death of the newly born young roots and accelerated the seedling death. Therefore, for frozen seedlings, we should not rush to apply chemical fertilizer at this time.

"what about the frost injury of corn?"

1. Remedial measures for lighter frozen corn seedlings. The symptoms of lightly frozen corn seedlings were that the tip and edge of the leaves were frozen to death, but the heart leaves did not freeze to death. According to the past experience, the normal fertilizer and water management of this kind of corn seedling field has no effect on the yield and growth period in the later stage.

2. Remedial measures for heavy frozen corn seedlings. The symptom of heavy frozen corn seedlings is that the whole leaves of the leaf tip are frozen to death and dry, but have not yet frozen to the growing point. 2-3 days after the temperature returns to normal, cut off the curled leaves of the frozen part of the corn seedlings with scissors so that the heart leaves can be extracted as soon as possible. As long as more than 60% of the corn seedlings in the field can resume growth and pull out new leaves, there is no need to destroy the seeds. After the temperature returned to normal, spraying foliar fertilizer twice to promote the growth of maize seedlings, early topdressing, so as to promote the early growth and rapid development of maize seedlings, play the role of seedling emergence, early maturity and yield increase, and still get a better yield.

3. Remedial measures for maize seedlings with serious freezing injury. The symptoms of maize seedlings with severe freezing injury showed that the growing point was water-immersed and brown, indicating that the growing point had been frozen to death, and measures were taken to protect and replenish the seedlings. Replant extra precocious corn next to the damaged corn (the injured seedlings are not removed), and so on in the later stage to determine which one to stay according to the growth of the two plants of corn; or accelerate the germination of corn seeds, and then replant and transplant.

4. Strengthen the prediction and control of diseases and insect pests. The stress resistance of maize decreased after freezing at the seedling stage. According to the field conditions, the prediction and prediction of diseases and insect pests should be strengthened and the prevention and control work should be done in time.

5. Foliar spraying growth regulator. The frozen land of corn seedlings was sprayed twice with 100 grams of potassium dihydrogen phosphate and 45 kilograms of water per mu to promote the rapid growth of corn.

"what about the frost injury of soybean?"

For the plots with less frost damage, loosen the soil and cultivate the soil in the rhizosphere in time to increase the soil temperature. Increase the application of available nitrogen, phosphorus and potassium fertilizer to enhance the repair of frostbite, promote multiple branches, rely on branches to form yield and reduce loss.

After the temperature rises and the plant resumes growth, foliar fertilizer such as potassium dihydrogen phosphate is sprayed to promote branch growth and increase the number of branches and pods. If the freezing injury is serious, it is recommended to destroy early-maturing varieties or miscellaneous grains.