Since the beginning of the winter, the temperatures in various places have been slightly higher than those in normal years. People often call such years “warm winter†years. Warm winter has both advantages and disadvantages for the growth of rapeseed. It can increase the vegetative body, promote the transformation and promotion of seedlings, and build a high yield seedling frame. The disadvantage is: First, it is easy to cause early moss. Sustained high temperatures caused early and early flowering of some rapeseed which had short growing period and early sowing. If the temperature drops suddenly, the seedlings may freeze to death. The second is that some of the pests on the field occur more seriously. According to the survey, rape aphids and cabbage caterpillars are overemphasized, so that some of the rape seedlings' leaves are crumpled and curled. In addition, aphids can also cause spring rape virus disease. The third is the emergence of deferred fertilizer in a few fields. As rape grows 1-2 times higher than normal in winter, it consumes a lot of nutrients and causes premature decomposing of rapeseed. Therefore, we must avoid weaknesses and grasp the management of rapeseed “four defenses†in the warm winter years to seize the rape harvest. One should promptly control locusts. In a few places, the temperature of the locusts is high because of the high temperature, resulting in lean and yellow crops, and may even cause viral disease epidemics. Prevention and treatment of rape aphids should do the following: First, timely application of pesticides. Where there are more than 500 locusts or more than 20 locusts in field, the pesticide should be applied in time. For seedlings that are sown early, with large leaves, and with high amounts of wolfberry, it is important to prevent and control them. They can be applied 2-3 times and applied once every 10 days. The second is the right medicine. Generally, 70 ml of enemy water is used to kill 50 kg of water, or 80% of dichlorvos or 40% of dimethoate is sprayed. Each mu uses 100 grams of water and 50 kg of water to spray on the back of leaves. The second is to prevent early moss and early flowers. High temperatures in winter, rape growth continues to grow, often appear early moss, early flowering phenomenon. Rapeseed bolting flowering too early, prone to cold damage in early spring, affecting growth and fertilization and fertility, thereby reducing production. In order to reduce losses, the remedial measures for premature bolting of flowering rape are: early picking. Picking moss can promote the branching of rape seedlings, increase the results, and increase the yield. Choose sunny days, when the moss height 0.6-1.0 feet when picking moss, when picking moss should generally stay at the base of the moss to leave 3-4 green leaves, to ensure that a certain number of branches. According to the test, picking the moss yields 15-20% more than the non-extracted moss. Rilled soil. The cultivating loose soil can damage part of the root system, reduce the absorption of nutrients by rape, and have a certain inhibitory effect on the growth of rape, thus delaying the flowering speed of bolting. The loose soil can also improve the ventilation performance of the soil and coordinate the conflicts between water, fertilizer, gas and heat, which is conducive to the formation of strong seedlings. Increase available nitrogen fertilizer. For thin, young and prematurely growing vegetables, some quick-acting nitrogen fertilizers should be added to make up for the nutritional deficiencies in the rapeseed, to prolong the vegetative growth and to reduce the flowering speed of the bolting. Usually, 30 lbs. 10 kilograms, sick and weak seedlings can be applied more, and overgrowth seedlings can also be applied as appropriate. Third, we must prevent freezing injury. One is cultivating earth and cultivating dirt. After the Spring Festival, the last cultivator must be completed, ploughed 3-5 inches deep, combined with deep cultivator and clearing ditch between the rows, raise the roots of the soil, bury the exposed root neck in the soil layer, in order to facilitate warming, heat preservation, and prevent root extraction. And late lodging, the gutters should be drained regularly in winter to keep the soil dry. The second is to increase phosphorus, potassium fertilizer, insulation and cold resistance. The dosage is determined by the seedlings, and the seedlings are mostly made of coarse fat, and the heat is the main ingredient. The seedlings are poorly applied and the fine fertilizer is used to increase the disease resistance of the rapeseed itself. Mu soil compost 80-100 and 100 kg woodgrass ash, phosphate fertilizer 10-20 kg, for the lack of nitrogen fertilizer and yellow seedlings, with 10 thin water pouring fecal pouring. The third is irrigating or dusting and freezing. In order to ease the attack of low temperature on the vegetable seedlings, watering or watering the antifreeze before the low temperature occurs, or spreading a layer of husk ash or other pig grazing on the surface of the leaves, or applying fire excrement on the vegetable seedlings in each hole, to reduce Freezing damage. The fourth is to remove the early moss and frozen leaves. Pick up moss that may flower before winter and pick it up as soon as possible. After the leaves are frozen, immediately remove the frozen leaves. Appropriately apply the available fertilizer to promote the growth of the seedlings as soon as possible. Fourth, we must prevent diseases. The function of sessile leaves of rape after spring is enhanced. Therefore, the yellow and old leaves of the base of the rape must be removed in time. Generally, the leaves should be picked 2-3 times. The basal leaves of 2-3 pieces should be picked first, and then gradually moved upwards. Leaves all light. When picking the leaves, it is necessary to leave no stalks or damage the stalks. The plucked leaves should be taken to the field for centralized treatment. Practice has proved that the removal of old dead leaves not only has little impact on the yield of rapeseed, but also has the advantages of reducing disease, improving ventilation and light transmission, and increasing quality organic fertilizer. Ginger Herbal Medicine,Ginger Food,Ginger Root,Ginger Powder Yirun Agricultural Cooperative , https://www.yiruncn.com