How to fertilize winter vegetables

In winter, the temperature is low, the microbial activity is weakened, and the fertilizers that need to be converted are slow. In winter, vegetable growth requires adequate fat. The solution to this contradiction is to pursue quick-acting fertilizers.
Nitrogen fertilizer can use ammonium bicarbonate, phosphate fertilizer should use superphosphate as much as possible, potassium fertilizer can choose potassium chloride (but potato, tomato and other chlorine crops should use potassium sulfate in the middle and late growth period), apply compound fertilizer can choose 45% ternary Compound fertilizer, farmyard manure can be used to decompose human excrement.
This is because, compared with urea, ammonium bicarbonate belongs to ammonium nitrogen fertilizer. It can be directly absorbed and utilized by crops after being applied to soil. Unlike urea, which is affected by low temperature, the fertilizer is slow and affects crop growth. It belongs to ammonium amide. It needs to be converted into ammonium nitrogen by the urease secreted by urea bacteria in the soil to be absorbed by the root system.
Superphosphate contains 14%-20% of effective phosphorus pentoxide (80%~95% of which is soluble in water), which is a water-soluble quick-acting phosphate fertilizer, and its fertilizer efficiency is faster than that of calcium magnesium phosphate.
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