How to manage rape before winter to realize strong seedlings to survive the winter safely

Rape overwintering

At present, it is the stage of rapid growth of direct seeding rape seedlings and slow seedling growth of transplanting rapeseed. The majority of farmers should do a good job in field management to promote the early development and rapid growth of rape and achieve strong seedlings to survive the winter safely.

First, clean up the "three ditches" and drain water and reduce stains. Because there are too many Rain Water in autumn and winter, rape is prone to waterlogging in the field. The vast number of farmers should clean up the "three ditches" in the field as soon as possible, realize the matching of the "three ditches", ensure smooth drainage, promote the growth and development of rape, and reduce diseases.

Second, fix the seedlings and check the seedlings to fill the gaps. The fields with large sowing amount, high emergence rate and too many basic seedlings of direct seeding rapeseed should be controlled at the stage of 3 true leaves and 5 leaves, and the density should be about 20, 000 to 30, 000 plants per mu; in case of seedling deficiency, dense seedlings can be used to transplant seedlings with soil, and root water should be irrigated in time after transplanting.

Third, ploughing and loosening the soil, topdressing and raising seedlings. Generally, rape should be ploughed in 2mi for 3 times, the first time after seedling setting or transplanting, the middle tillage should be shallow, and then gradually deepened. Tall seedlings should cultivate soil in time to prevent frost damage. At the same time, for the direct seeding rape which is greatly affected by waterlogging or sowed later, the seedling fertilizer should be applied in time, and for transplanting rape, the seedling fertilizer should be applied early after living, so that when the temperature drops, the plant has a certain vegetative body to undergo low temperature temperature. cultivate strong winter seedlings with a purple edge and a green heart. Raising seedling fertilizer should grasp the principle of early, light and quick effect, and the amount of fertilizer application accounts for about 20% of the total topdressing amount. Generally, about 7.5 kg of urea is used per mu. To the middle and late December, qualified farmers can spread plant ash, dung water, etc., generally use 600 kilograms of human and animal manure per mu. The application of phosphorus and potassium fertilizer can also improve the cold resistance of rape.

Fourth, control diseases and insect pests and weed at the right time. Before winter, rape is mainly used to control aphids, using 30 grams of 10% imidacloprid wettable powder per mu, or 20 grams of 25% imidacloprid wettable powder, and spraying 30 kilograms of water. In order to control weeds in rape field, one of the following chemicals was selected to control weeds in the 5-leaf stage of 3Mel, and 40 kg of water was sprayed in sunny days. Control Gramineae weeds with 20% efficient herbaceous energy EC 40-50 ml per mu, control broad-leaf weeds with 50% herbicide suspension 40-50 ml per mu, direct seeding rape 6 min 8 leaf stage, transplanting rape green 2 mi 3 leaf stage In the field of Gramineae mixed with broad-leaved weeds, 17.5% grass was used to remove refined grass EC (block knife) 120-150ml per mu at 2-3 leaf stage of weeds. Cabbage type and mustard type rape were forbidden. Rape field. The use of aminobenzenesulfuron and its mixtures is strictly prohibited.