During the winter of wheat, due to cold freezing or improper management, dead seedlings are often caused, and measures should be taken to prevent and remedy them as soon as possible. Preventive measures: 1. Winter irrigation drought protection seedlings. Winter irrigation begins when the average daily temperature is 7°C to 8°C, and it ends when the average daily temperature is 4°C to 5°C. It is advisable for the field to freeze at night. 2. Suppression of solid soil. The wheat field repression can increase the temperature and ensure the safety of the crop, and it can be carried out before noon on the sunny day after wheat ceases to grow until 4 o'clock in the afternoon. 3. The cultivator plans to make up for the cracks. After winter irrigation, the wheat field should be planed in time to break the soil compaction, make up for cracks, enhance the capacity of heat preservation and conservation, and promote the development of wheat roots. Remedy: 1. transplant seedlings, sparse density. If the seedlings are cut off due to overwintering seedlings, they can be thinned and replenished after turning green. The white wheat seedlings that are still green in the tillering section, and which are still recoverable, do not have to be transplanted to make up the seedlings. The management should be strengthened. 2. Apply nitrogen fertilizer to promote seedling rejuvenation. After fertilization of wheat, early application of fertilizer, application of urea 10-15 kg per mu, to promote the wheat as soon as possible rejuvenation. 3. According to local conditions, timely watering. For transplanting seedlings in wheat fields, watering should be promptly done after the seedlings are filled. The plots that do not make up the seedlings cannot be watered prematurely and should be flexibly controlled according to the ground temperature and soil moisture. Generally, when the wheat is returned to green, the temperature of 5 cm is stable and it is watered at 5°C. The amount of water should not be too large and should be poured lightly. A better-known plot can postpone watering time. 4. Foliar fertilization, nutritional supplements. Spraying humic acid foliar fertilizer once or twice after freezing injury of wheat can promote the recovery of wheat as soon as possible. 5. Cultivate arranging, warming and keeping warm. After the top soil is frozen, the wheat fields are arbitrarily cultivated and cultivated, and the soil is loosened to promote early and early growth of the wheat seedlings and improve the rate of success.
Color waxy corn is generally white, yellow, red, purple and black, white, yellow and purple corn is the basic color. The purple gene in a purple/white hybrid will naturally become purple if it "beats" the white gene, and vice versa, if it's a tie, what we see is a white/purple corn. Purple can turn into red corn and black corn, which is often called "red is purple, black is purple."
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