Appropriate application of nitrogen fertilizer general nitrogen fertilizer should be applied in the flood season. The rapeseed field that grows poorly before winter and has insufficient fertility should be applied at the beginning of convulsions, and topdressing 10 kg of urea per 667 square meters. Good rape that grows well before winter must be applied at a proper time. It is appropriate to apply it at a height of 10 to 13 centimeters and apply urea 4.5 to 5 kilograms per 667 square meters. For the well-developed winter and well-tolerated rapeseed during the wintering period, the manure should be applied late and infrequently. It is generally recommended to apply it at the time of flowering. Apply urea 2.5 kg per 667 m2, or use 1% to 2% urea solution. Foliar spraying. For special fat fields and vigorous rapeseed, they are not applied.
The increase of potash fertilizer budding and flowering period is the peak period of potassium requirement in the whole growth period of rapeseed. When the previous application of potassium fertilizer is insufficient, it should be increased in this period to improve the ability of rape resistance to disease and lodging, while improving the yield and quality. Generally, in the period from late February to early March, topdressing potassium chloride 5 to 7.5 kg or plant ash 70 kg per 667 square meters. For potassium-deficient soil and transplanted rapeseed in paddy fields, appropriate potassium fertilizers should be added.
Supplementary application of phosphate fertilizer in the flowering stage of bud application of phosphate fertilizer, can promote early maturity, improve seed setting rate and oil content. Phosphate fertilizer can be sprayed on the root surface and sprayed once at the initial and final flowering stages. Every 667 square meters of calcium phosphate 0.5 ~ 1 kg, 50 kg of water soaked for 24 hours, filtered to residue, and then evenly sprayed on the stems and leaves. Potassium dihydrogen phosphate (100 g/m2) can also be used in conjunction with potassium supplementation.
Spraying boron-deficient rapeseeds with boron deficiency can cause spurious phenomena and reduce yield and quality. Foliar application of boron fertilizer has obvious effect of increasing production. It can be sprayed once in the flood season and early flowering period. For every 667 square meters, 100 grams of borax is used. The borax is first dissolved with a small amount of warm water, and then diluted with water to make a borax solution with a concentration of 0.2%. Spray borax dilution 50-60 kg per 667 square meters. (Gao Jianbin)
The increase of potash fertilizer budding and flowering period is the peak period of potassium requirement in the whole growth period of rapeseed. When the previous application of potassium fertilizer is insufficient, it should be increased in this period to improve the ability of rape resistance to disease and lodging, while improving the yield and quality. Generally, in the period from late February to early March, topdressing potassium chloride 5 to 7.5 kg or plant ash 70 kg per 667 square meters. For potassium-deficient soil and transplanted rapeseed in paddy fields, appropriate potassium fertilizers should be added.
Supplementary application of phosphate fertilizer in the flowering stage of bud application of phosphate fertilizer, can promote early maturity, improve seed setting rate and oil content. Phosphate fertilizer can be sprayed on the root surface and sprayed once at the initial and final flowering stages. Every 667 square meters of calcium phosphate 0.5 ~ 1 kg, 50 kg of water soaked for 24 hours, filtered to residue, and then evenly sprayed on the stems and leaves. Potassium dihydrogen phosphate (100 g/m2) can also be used in conjunction with potassium supplementation.
Spraying boron-deficient rapeseeds with boron deficiency can cause spurious phenomena and reduce yield and quality. Foliar application of boron fertilizer has obvious effect of increasing production. It can be sprayed once in the flood season and early flowering period. For every 667 square meters, 100 grams of borax is used. The borax is first dissolved with a small amount of warm water, and then diluted with water to make a borax solution with a concentration of 0.2%. Spray borax dilution 50-60 kg per 667 square meters. (Gao Jianbin)
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