Wheat freeze injury symptoms: Freezing injury in winter is caused by the cold injury caused by the cooling of cold during winter and wintering. According to the symptoms of wheat after freezing, the winter freezing injury can be divided into two categories: The first type is severe freezing injury, that is, the main stem and the Oita are frozen to death, the heart leaves dry, generally occurs in the jointed wheat field. Because the wheat enters the jointing stage, the cold resistance is obviously reduced, especially the development of the main stem and the large tiller is most vulnerable to the small tiller. The second type is general freezing injury. Symptoms are that the leaves are dry and yellow, but the main stem and the big shoots are not frozen. The first type of frost damage will affect the yield, and the second type of frost damage will basically have no effect on the yield. Wheat antifreeze measures: 1ã€Repression after sowing It is beneficial for wheat to compact the land during the winter and it can bridge the gaps in the soil, thus improving the heat preservation capacity of the land. In particular, after the straw is returned to the field, it is even more necessary to suppress it. 2, choose the timing of winter irrigation Appropriate winter irrigation is conducive to safe winter wheat, winter irrigation can increase the heat capacity of the soil, and can promote the growth and development of wheat seedlings. Wheat seedlings are strong and conducive to frost resistance. At the same time, it should be noted that the winter irrigation should be suitable when the temperature is 4 degrees Celsius. If it is less than 4 degrees Celsius, there is a danger of freezing injury. Counterproductive. The temperature should be controlled. Remember: The light is not frozen and it is not too late, but it is too late for the light to freeze. That is, before the arrival of cold air, a winter irrigation is performed. 3, fertilization In the spring, spraying potassium dihydrogen phosphate and humic acid, alginic acid, and amino acid foliar fertilizers to spray potassium dihydrogen phosphate in time when wheat turns green can play a role in strong roots and strong seedlings. Humic acid and alginate leaf Fertilizer can provide wheat resistance. At the same time, it can quickly promote the turning green of wheat. 4, appropriate sowing This year, the phenomenon of seed germination emerged during the wheat harvest, and the germination rate and germination potential decreased significantly. Therefore, when sowing, the seeding amount can be appropriately increased, but it should not be increased too much. Sowing too much wheat seedlings dense, high growth, easy to suffer freezing injury. Specific seeding rate, it is recommended to ask the local seed distributors, and determine the germination rate of the species in detail. 5. Cover grass Before winter, in the wheat row, 300-400 kilograms of wheat bran, wheat straw, or other plant wastes are spread per acre, which guarantees both picking up and freezing. After the decay, the soil can be improved and fertility can be cultivated. This is wheat's drought resistance and antifreeze. Increased production of effective measures. 6, the soil around the root When the wheat seedlings are about to stop growing before overwintering, the combination of ploughing and ramming soil can effectively prevent the winter wheat from freezing, and the year of serious frost damage is particularly obvious. Generally, it can increase production by 5%-10%. 7, cover dung After winter wheat enters the wintering period, a layer of manure (commonly known as “warm ditch manureâ€) is spread on the ridges to protect the wind, protect the soil, increase the temperature and prevent freezing, and supplement the nutrients for the young seedlings. The thickness of the manure is preferably 3-4 cm. The application of manure is about 5 cars per acre, but when it is insufficient, late barley fields, shallow-seeding wheat fields, sandy wheat fields, and wheat fields sown with weak winter varieties are preferred. 8, control and promote strong In the winter when wheat freezes damage, spraying 0.3%-0.5% chlorcholine solution on the wheat seedlings or cutting roots can inhibit the growth of the plants and prevent or reduce the occurrence of frost damage. COVID-19 Antigen Rapid Test-nasophary Ngeal Swab-throat Swab Covid-19 Antigen Rapid Test-Nasophary Ngeal Swab-Throat Swab,Covid-19 Throat And Nasal Test Kit,Self-Test Covid-19 Antigen Test Kit,Covid-19 Antigen Saliva Test Weihai Kangzhou Biotechnology Engineering Co.,Ltd , https://www.weihaikangzhou.com
According to the weather forecast, this year is a year when the temperature is extremely low, so this winter may be very cold. Therefore, we must pay more attention to wheat antifreeze. Note that helping wheat is less affected by the bad weather. So how does wheat prevent freezing? The following describes the wheat antifreeze method.