How to apply fertilizer if you want high yield of rapeseed?

How to apply fertilizer if you want high yield of rapeseed? Please introduce the following methods to apply fertilizer to rape: first, early application of seedling fertilizer should be properly applied early, and the application amount should account for 10%-15% of the total fertilization, 500 kg of feces and urine of acquaintances per mu, and 5-7 kg of urea or 10-15 kg of ammonium bicarbonate. When applying chemical fertilizer, it is best to apply fertilizer to clear water. Second, the stable application of wax fertilizer is mainly slow-release fertilizer, with 3000-4000 kg of miscellaneous fertilizer per mu of soil, 20 kg of compound fertilizer and 300-500 kg of straw. Before fertilizing, first ploughing and weeding, and then fertilizing, shoveling soil and choking roots. Third, the re-application of bolting fertilizer is a fertilizer with better fertilization effect in rape life, which usually accounts for 30% of the total fertilizer application. At the same time, it is necessary to do the following: first, look at the seedlings and re-apply to the fields where the seedlings are big, remove fertilizer and fall yellow early, and the soil stamina is insufficient. The second is the combined application of nitrogen and potash fertilizer. for the strong seedling field in autumn and winter, 1520kg of urea and 5kg of potassium chloride were applied at the end of January and the beginning of February of the following year. Third, for the serious lack of fertilizer, bolting fertilizer should be applied twice, the interval between the two periods is 10 to 15 days, and the dosage is a little more. Fourth, skillfully applying flower fertilizer can make up for the lack of fertility in the middle and later stage. The specific conditions should be determined according to the situation of seedlings and soil fertility. For fields with stable growth and insufficient fertility after spring, urea 4kg / mu or ammonium sulfate 8kg / mu should be applied, and fields with weak growth should be applied early, and fields with good growth and stamina should not be fertilized again. 5. Boron fertilizer must be applied in Brassica napus, which is a boron-loving crop, and hybrid rape is more sensitive to boron. Boron fertilizer is generally better with basal application and foliar spraying, 0.5 kg / mu mixed with base fertilizer, 150 grams of borax per mu at bud bolting stage and early flowering stage, and 50 kg / mu of water for 2 consecutive sprays. 6. the root activity of rape decreased after flowering with the application of grain fertilizer, which is an effective way to prolong the life of leaves and stems, increase grain weight and increase yield. Generally, 150 grams of potassium dihydrogen phosphate, 0.5 kilograms of urea per mu, 50 kilograms of water and 60 kilograms of water can be sprayed for 3 times, and grain fertilizer can also be applied in combination with disease prevention and pest control. Click to get more rape planting techniques click to get more food crop planting techniques