Balanced fertilization is based on the application of basal fertilizer, but also to topdressing, to re-apply nitrogen fertilizer as a prerequisite, the use of fertilizer should grasp the principle of "before the light after heavy", top dressing is generally divided into 2 to 3 times, the first time the top dressing Should be in the early lotus, per acre 10 to 15 kg of urea, potassium sulfate 5 to 10 kg. Into the ball-making period (heart period) is now at a time when the Chinese cabbage grows. It needs to supply sufficient nutrients. Generally, it can use ternary compound fertilizer (high-nitrogen fertilizer), with a dosage of about 50 kilograms per acre, divided into early and mid-balloons. Sub-applications. Should adopt foliar topdressing, available 0.3% ~ 0.5% calcium chloride spray, once every 7 days, 2 or 3 times in a row can be achieved control effect, make-up application of micro-fermented cabbage is more sensitive to boron, the lack of boron on The impact of yield is greater. For boron-deficient soil, boron fertilizer should be applied. Boron fertilizer can be used as basal fertilizer, applying 1 kg of borax per acre, mixed with other fertilizers, and applied to the soil. If the basal boron fertilizer is insufficient, 0.1%~0.2% borax solution can be sprayed from the rosette stage to the ball stage and sprayed once every 6~7 days for 2~3 times in a row. The effect is ideal.
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