Rapeseed field
During the rapeseed field management, reasonable fertilization according to the growth of the seedlings and the needs of the different growth stages can promote the effects of early growth, stability, growth of moss, branching, flower promotion, pod addition and grain weight. It has a very obvious effect of increasing production.
Apply seedling fertilizer early. After the rapeseed is transplanted into live or live seedlings, 2-5 kg ​​of urea is applied to the acre, or 12-15 kg of ammonium bicarbonate, 20-30 times of the manure water is cleared, and the seedling fertilizer can be applied in time to improve the early root hairs and promote the cultivation. Strong seedlings overwintering. For rapeseed that is delayed or delayed in late delivery, after the first fattening for half a month, a second top dressing should be carried out in moderation. Fertilization should be combined with cultivating and weeding to cover the fertilizer.
Apply enough to open the fertilizer. The fertilization time is carried out before the bolting of the rape in the late winter and early spring. This topdressing can improve the ground temperature and prevent the freezing damage of pre-canola, and realize the spring use of wax fertilizer. Improve bolting and flowering. Mu is made of high-quality rotted slag fertilizer to match manure and manure water, and 4-5 kg ​​of urea is used to open the nest, and the soil mulch is used in parallel.
Stabilize the fertilizer. Fertilization time and dosage should be judged according to the growth of rapeseed. Poor growth before winter, rapeseed with insufficient base fertilizer should be applied during bolting. Usually, 10-15 tons of animal manure water, or 5-8 kg of urea, or 15-20 kg of ammonium carbonate should be applied to the water; For winter strong seedlings that grow well before winter and have sufficient nutrition, they should be applied slowly, usually when the bolting is 10-13 cm high, and the amount of fertilization is appropriately reduced; the winter is full of nutrients and strong growth before winter. Seedlings, usually applied when seeing flowers, and mainly human and animal dung, it is not appropriate to apply nitrogen fertilizer, so as not to be mad, resulting in late maturity and lodging.
Spray phosphorus and boron fertilizer. The application method is: in the moss stage and the initial flowering stage, the per-calcium Phosphate is 0.1-1 kg, and 40 kg of water is added to soak for one night, and the filter residue is taken for foliar spraying. At the same time, 100 grams of borax is used in the mu, and then fully dissolved with a small amount of warm water, then 70-75 kg of water is applied for foliar fertilization, which can make up for the deficiency of boron in the soil and facilitate the flowering and consolidation of rapeseed.
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