1. Spray potassium dihydrogen phosphate to grow the ball to the balling stage, spray 0.3%-0.5% potassium dihydrogen phosphate solution every 7-10 days, even spray 2-3 times, generally increase production 15 %-20%.
2. Spraying rare earth The Chinese cabbage can be sprayed with 0.03%, 0.05%, and 0.08% rare earth solution in the sitting, balling, and wrapping phases, which can increase yield by more than 10%.
3, spray gibberine during the core period with 30-40 mg / kg gibberellin solution spray 1-2 times, can promote the core, improve quality, increase production by about 20%.
4, spray calcium chloride cabbage from the sitting period to the core period, spray 0.7% calcium chloride solution every 7-10 days, even spray 5 times, can prevent cabbage "dry heart".
5, spray grass ash lotus before the start of the ball to the ball, spray 0.5% of the ash ash leaching solution every 5-10 days, even spray 2 times, can increase production by 15%, and can improve the quality.
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