Rape is one of the largest crops of winter farmland in Xinyang City. This year, more than 200 million mu of rape were planted in the city, of which, the area of ​​live rapeseeds accounted for more than 90%. At present, the snow has passed the solar terms, and the cold and cold air has arrived, quickly promoting the weak and turning strong, nurturing strong seedlings and realizing safe wintering of rapeseed is the focus of winter management. For this purpose, the following management opinions are proposed:
1. Sparse seedlings and make up seedlings. For live (on-demand) rapeseed, we must pay close attention to sparse seedlings to avoid seedlings squeezing seedlings to form weak seedlings. Raise the seedlings of the oilseed rape planted in the deficient seedlings, and bring in water during the supplementary planting to promote early survival.
2. Cultivate and cultivate soil. In combination with cultivator cultivation, not only can reduce the freezing injury, but also can prevent lodging.
3. Reasonable fertilization. Early Miao Miao, to promote the autumn rape winter strong. 20 days to 30 days after seedling emergence of live rapeseed, topdressing a seedling, generally 5 kg of urea per acre; during the wintering period, it is necessary to apply good wax fertilizer to poor growing conditions and increase the application of phosphorus, potassium and boron fertilizer to prevent rape from appearing. Not true."
4. Qinggou drainage stains, prevent waterlogging and frost damage. It is necessary to remove the stagnant water in the field in time to achieve rain. In particular, the humidity of rice fields in rapeseed fields is high, and it is necessary to ensure that the channels communicate with each other and drainage is smooth. In the overwintering period, paclobutrazol and other chemical controlling agents were sprayed on overgrown rapeseeds to promote dwarfness and root development of the plants, and to improve the ability of rape to resist cold and freeze.
5. Adopt comprehensive measures to prevent pests and weeds. In winter, rape fields, cabbage caterpillars, rapeseed meal, and hopscotches occur easily in rapeseed fields, and they can be controlled by enemy killed or beta-cypermethrin. Chemical weed control should be based on the type of weeds used to herbicides, mainly grasses, in the weeds 3 leaves to 4 leaf stage, use 5% quizaldoprene EC or 15% of the fine steady kill and other control; with broadleaf For weeds, 50% herbicides can be used as suspenders, or mixed with grass herbicides to increase weeding.
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