Due to various reasons, a part of rapeseed will be planted late every year. The winter management of this part of rapeseed should be strengthened to obtain a good harvest.
Early Miao Miao so that late planting late planting rape full use of pre-winter temperature and light conditions long leaves, grow up, should be applied early Miao Miao. After nursery seedlings or seedlings are seeded, per acre with ammonium bicarbonate 10 to 15 kg or 500 to 600 kg of human and animal urine water pouring, no application of boron fertilizer field application of borax 500 to 600 grams per acre. After half a month, 15 to 20 kg of ammonium bicarbonate or 600 to 700 kg of human and animal waste was applied per mu. Small seedlings should be applied more appropriately, and more water should be added when the soil is dry.
Early winterization of late planting rape seedlings late winter time is not conducive to emergence, should take timely measures to promote seedling growth. After the green rape is turned green, it is cultivated once to increase soil temperature, increase soil permeability, reduce soil moisture, and promote root growth. In combination with cultivator, put 3 to 5 kg of urea per acre and add water to raise seedlings. Paddy field transplanting rape fields will loosen the topsoil and break the soil blocks. After two months of cultivating once again, it is advised to deepen and loosen the soil. In combination with the cultivator, clean up the "three ditches" so that the "three ditches" are connected and there is no water accumulation in the fields.
Straw cover covered with straw in the rapeseed line, can prevent grass, drought, heat preservation and fertilizer, late rapeseed covering rice straw can promote seedling growth. In general, 250-300 kg of rice straw is covered per mu. After spreading, the straw is spread on the straw to prevent wind from spreading.
The late application of wax fertilizer late planting rapeseed growth is slow, small seedlings, weak resistance to cold, should be re-applied in mid-December wax fertilizer to increase soil temperature. Mainly organic fertilizer, medium fertility plots per mus of 1250 kg pig manure, 10 ~ 15 kg of ammonium bicarbonate, fertilizer mix and apply in the rapeseed line. At the same time, in combination with digging the roots of the soil, the soil is covered with fertilizer to reduce the loss of fertilizer and keep warm and prevent freezing.
Spraying foliar fertilizer with phosphate fertilizer can enhance the cold resistance of plants and ensure that rape can safely pass winter. Take 2 kg of calcium phosphate per acre, add appropriate amount of fresh water to soak for 1 week, and add 200 grams of urea to the leachate. Spray once every 7 to 10 days and spray 2 or 3 times.
The control of late-planting, late-planting and late-planting rapeseeds has weak vegetative growth before winter and is prone to early pod emergence and early flowering. Measures should be taken early to control. For well-cultivated and fertile fields, intensive tillage, 7–10 cm of cultivating near the root of rapeseed, cut off part of the root system, controlled growth, and applied nitrogen fertilizer when rape was falling. The application of nitrogen fertilizer to poorly growing rapeseeds prolongs the period of vegetative growth, increases the amount of growth, and prevents early infestation and early flowering. Pick up pods of rape that may have been convulsions earlier in the year, inhibit the apical dominance of the plants, transfer the nutrients to the next branch, and postpone the birth process. Appropriate application of nitrogen fertilizer after picking lotus root to promote branching.
Early Miao Miao so that late planting late planting rape full use of pre-winter temperature and light conditions long leaves, grow up, should be applied early Miao Miao. After nursery seedlings or seedlings are seeded, per acre with ammonium bicarbonate 10 to 15 kg or 500 to 600 kg of human and animal urine water pouring, no application of boron fertilizer field application of borax 500 to 600 grams per acre. After half a month, 15 to 20 kg of ammonium bicarbonate or 600 to 700 kg of human and animal waste was applied per mu. Small seedlings should be applied more appropriately, and more water should be added when the soil is dry.
Early winterization of late planting rape seedlings late winter time is not conducive to emergence, should take timely measures to promote seedling growth. After the green rape is turned green, it is cultivated once to increase soil temperature, increase soil permeability, reduce soil moisture, and promote root growth. In combination with cultivator, put 3 to 5 kg of urea per acre and add water to raise seedlings. Paddy field transplanting rape fields will loosen the topsoil and break the soil blocks. After two months of cultivating once again, it is advised to deepen and loosen the soil. In combination with the cultivator, clean up the "three ditches" so that the "three ditches" are connected and there is no water accumulation in the fields.
Straw cover covered with straw in the rapeseed line, can prevent grass, drought, heat preservation and fertilizer, late rapeseed covering rice straw can promote seedling growth. In general, 250-300 kg of rice straw is covered per mu. After spreading, the straw is spread on the straw to prevent wind from spreading.
The late application of wax fertilizer late planting rapeseed growth is slow, small seedlings, weak resistance to cold, should be re-applied in mid-December wax fertilizer to increase soil temperature. Mainly organic fertilizer, medium fertility plots per mus of 1250 kg pig manure, 10 ~ 15 kg of ammonium bicarbonate, fertilizer mix and apply in the rapeseed line. At the same time, in combination with digging the roots of the soil, the soil is covered with fertilizer to reduce the loss of fertilizer and keep warm and prevent freezing.
Spraying foliar fertilizer with phosphate fertilizer can enhance the cold resistance of plants and ensure that rape can safely pass winter. Take 2 kg of calcium phosphate per acre, add appropriate amount of fresh water to soak for 1 week, and add 200 grams of urea to the leachate. Spray once every 7 to 10 days and spray 2 or 3 times.
The control of late-planting, late-planting and late-planting rapeseeds has weak vegetative growth before winter and is prone to early pod emergence and early flowering. Measures should be taken early to control. For well-cultivated and fertile fields, intensive tillage, 7–10 cm of cultivating near the root of rapeseed, cut off part of the root system, controlled growth, and applied nitrogen fertilizer when rape was falling. The application of nitrogen fertilizer to poorly growing rapeseeds prolongs the period of vegetative growth, increases the amount of growth, and prevents early infestation and early flowering. Pick up pods of rape that may have been convulsions earlier in the year, inhibit the apical dominance of the plants, transfer the nutrients to the next branch, and postpone the birth process. Appropriate application of nitrogen fertilizer after picking lotus root to promote branching.
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