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Early application of Spring Fertilizer early spring fertilizer can promote the growth of rapeseed before winter, more branches, early bud. Insufficient application of basal fertilizer and unfertilized rapeseed field, early application of spring fertilizer is the key to seizing high yield. In general, 15 to 20 kg of ammonium bicarbonate or 6 to 7 kg of urea is dissolved in diluted manure water per mu.
The clever application of fertilizers and buds is a crucial period for rape spring crops. At this time, the amount of fertilizer required is relatively large, accounting for about 50% of the total fertilizer requirement. Insufficient use of basal fertilizer and wax fertilizer, weak seedlings and poor growing fields should be applied early and heavy fertilizer application. When the loquat height is 3 to 5 cm, 750 to 1,000 kg of manure will be used per mu, and 4 to 5 kg of urea or 20 kg of ammonium bicarbonate will be added. The over-expansion of the plots should be delayed and lightly applied.
The phenomenon of “flowering but not realizing†of boron-assisted rapeseed is caused by boron deficiency. The application of boron fertilizer can prevent the occurrence of this phenomenon, and hybrid rape should be applied with boron. In the flood season and the early flowering period, each application of boron fertilizer is performed once. Each time, 50 to 100 grams of borax is used per acre, and 50 to 60 kg of water is added after being dissolved in hot water. It is best to use solubilized boron such as Sonic boron.
Applying appropriate amounts of fertilizers and fertilizers can make rape more robust and increase grain gain. When the height of the beak is 50-60 centimeters, the wind-free sunny afternoon is used to spray the flower fertilizer. Poor growth fields can be mixed with 300 grams of urea per acre in potassium dihydrogen phosphate solution.
Increasing potash fertilizer and potash fertilizer can enhance rapeseed plant resistance to lodging, disease, cold and stain resistance. Potassium fertilizers were applied in the spring to potassium-deficient soils, sandy lands, and hybrid rice fields to increase the yield. Potash fertilizer is generally applied from late February to early March, and 150-200 kg of straw ash or 15 kg of potassium chloride per mu.
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Rape fertilizer after spring
After the beginning of spring, rape enters the vigorous growth period where vegetative growth and reproductive growth go hand in hand, and it needs to absorb a large amount of nutrients. It should be based on soil quality, climate, and fertilization before spring, combined with the science of fertility and fertilization.
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