The temperature gradually rises in spring, and the growth of rapeseed over winter begins to accelerate. At this time, the whole plant gradually transforms to reproductive growth, and the amount of fertilizer required during the development period is large. Therefore, the application of fertilizer during the bolting and flowering period of rape should be emphasized. Appropriately increase the amount of fertilizer applied For the relatively weak rape seedlings, about 10 kilograms of urea per acre is used to extract the seedlings and promote the healthy growth of rapeseeds. The growth of rape seedlings is relatively strong, and if the use of base fertilizer is sufficient in winter, top dressing can be appropriately reduced or no top dressing, depending on the specific situation. For the weak field fertility, the bolting and branching of rape seedlings is about 10 cm, and 45% compound fertilizer can be topdressed, which is about 20 kg per mu. When rapeseed enters the bolting and flowering period, it needs enough water, but not too much. After fertilization, the soil is dry and the fertilizer is not easily absorbed. It should be watered properly. It needs to be watered in drought or drained in case of waterlogging. Extra-root topdressing can supplement nutrients Top dressing during the flowering period, the rapeseed has a large blooming amount and a long flowering time, requires a lot of fertilizers, sufficient fertilizers, more effective flowers, and full rape pods. At this time, it should be noted that the rapeseed plant has grown tall, and this period is mainly through the form of extra-root topdressing for fertilizer supplementation. Rape needs more potassium fertilizer in the middle and late stages of growth, which is beneficial to increase the grain weight of rapeseed. Therefore, supplementing potassium fertilizer can be sprayed with 10% plant ash aqueous solution on the leaf surface alone, at an interval of 7 to 10 days, and then sprayed again, or sprayed with 0.2% phosphoric acid Potassium dihydrogen + 0.2% urea + brassinolide has a good effect on increasing production. Diseases and pests should be controlled in time In order to achieve high-yield rapeseed, attention should be paid to the prevention and control of plant diseases and insect pests. Diseases and insect pests are closely related to the humidity in the field. The humidity in the field is high, the ventilation and light transmission ability is poor, and the rape sclerotinia disease is prone to appear. In addition to good management of field humidity, timely spraying of fungicides and insecticides is one of the effective measures to prevent pests and diseases. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone Urine Test Strips 10 Parameters
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