After the beginning of spring, the temperature rises, the rain increases, and the growth of rapeseed is accelerated. It is another key management period for the high yield and good harvest of rapeseed. To this end, the following field management technical points are proposed:
First, clear the ditch in time. In spring, there is a lot of rain, especially in paddy field rape. Because of the low terrain, if the drainage is not timely, it is easy to cause waterlogging, affecting the root development of rapeseed, causing the increase of sclerotinia disease. Therefore, it is necessary to pay attention to timely clearing the ditch and ensuring the smooth flow of the main ditch. The depth of the three ditches of the trench, the lobe and the surrounding ditch should be deepened step by step to ensure smooth drainage and no obvious water accumulation on the field. Linyi Fertilizer Network Copyright
Second, due to seedling science topdressing. For weak seedlings with small growth or rapeseed fields that have been de-fertilized and yellowed, 5 kg of urea per kilogram plus 1 kg of potassium dihydrogen phosphate can be applied to promote spring hair. For the early rapeseed fields, it is necessary to control the application of nitrogen fertilizer to avoid the reduction of production by gluttony. Linyi Fertilizer Network Copyright
Third, do a good job of "one promotes four defenses." In the middle and late stages of rapeseed growth, combined with the prevention and control of Sclerotinia sclerotiorum, vigorously promote the mixing of fertilizers and drugs, to promote the growth and development of rapeseed, anti-flowers, anti-bacterial disease, anti-premature aging, anti-high temperature and ripening purposes. The specific measures are spraying the mixed solution of potassium dihydrogen phosphate, boron fertilizer and bactericide on the foliar surface of the initial flowering stage. The ratio of mixing per mu: 40% sclerotium net wettable powder or 100 grams of imipenem, potassium dihydrogen phosphate 100 grams, quick-acting boron (effective boron content > 20%) 50 grams, the amount of liquid spray for motorized sprayer is 12-15 kg, and the amount of liquid used for manual sprayer is not less than 30 kg. Linyi Fertilizer Network Copyright
Fourth, do a good job in chemical weeding. After spring, the weeds grow fast. The rapeseed field, which is mainly grass weeds, can be used to weed 10.8% of the high-efficiency flupirtine emulsifiable concentrate 20-30 ml and 50 kg of spray per acre. Each acre can be sprayed with 25-30 ml of chlorpyrifos on 50 kg of water; the field where broadleaf weeds and grass weeds are mixed, 17.5% of quinolin and herbicide emulsifiable concentrate per acre can be used for water 40 Kilogram spray control; spray should be even and thoughtful. Linyi Fertilizer Network Copyright
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