Early Spring Coarse Dressing

As early as the application of fertilizer, as the saying goes: "Spring dishes fierce like a tiger." When the temperature rises above 10°C, rapeseeds are gradually twitching. This is the period of vigorous growth in which rapeseed grows fastest and absorbs most fertilizer. The application of manure fertilizer before or during the convulsions of rapeseed can make the spring rape grow steadily and grow more. Topdressing fertilizer should be "speed" and "early", can apply urea 7.5 to 10 kg per mu or 25 kg of ammonium bicarbonate. For rapeseed that is late in the planting period and with severe frost damage, it should be applied early and applied more.

Qiao Shihua said: "Mai pour buds, vegetables watering." Rapeseed has a long flowering period, flowers on the side, edge angles, and mature edges. Therefore, seedlings are applied to flowering plants before flowering or at the flowering stage to increase the junction angle rate and reduce the shedding and shade angles. Generally in the early flowering period, the application of urea 2 ~ 3 kg or ammonium bicarbonate 7 ~ 8 kg. Early fertility and good growth may not be applied, it is necessary to prevent excessive application of too late and too much fertilizer, so as to avoid delaying greediness. For general fertilizer-poor fields, 0.2 kg of potassium dihydrogen phosphate and 0.5 kg of urea can also be used for mu, and then 75 kg of water can be sprayed at full bloom.

Applying boron fertilizer in the initial stage of bolting boron fertilizer can avoid the "flower but not real" disease and increase the seed setting rate. In the initial stage of bolting, spray 0.1%-0.2% borax aqueous solution 60 kg/mu (times), or use 50 grams of instant boron fertilizer, add 60 kg of water to spray, the effect is better. Under the condition that the base fertilizer was not applied with boron fertilizer, the effect of increasing the production of boron sprayed out of roots was more prominent.

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