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1 喷施尿素。从莲座期开始,每隔10天喷一次0.2％～0.5％尿素液,共喷2～3次,可增产15％～20％。 2 喷施草木灰。从莲座期开始,配合中耕,每667m~2穴施草木灰30～50kg,可增产20％左右。 3 喷施米醋。在大白菜莲座期至结球期喷施300～500倍米醋液,每隔5～7天一次,连喷3次,可增产17％～32％。 4 喷施磷酸二氢钾。在大白菜莲座期至结球期喷施0.3％～0.5％磷酸二氢钾,每隔7～10天喷一次,连喷2～3次,不仅可增产15％～25％,还可显著增加大白菜的净球量。
1 spray urea. From the rosette period, spraying every 10 days 0.2% ~ 0.5% urea solution, spray a total of 2 to 3 times, can increase 15% to 20%. 2 spraying ash. From the rosette period, with cultivation, every 667m ~ 2 Shi Shi grass ash 30 ~ 50kg, can increase about 20%. 3 spray vinegar. In cabbage rosette stage to the junction of spraying 300 to 500 times the rice vinegar, once every 5 to 7 days, and even spray 3 times, can increase 17% to 32%. 4 sprayed with potassium dihydrogen phosphate. In the cabbage rosette stage to the cotyledon spraying 0.3% ~ 0.5% potassium dihydrogen phosphate, spray every 7 to 10 days, and even spray 2 or 3 times, not only increase 15% to 25%, but also significantly increased Chinese cabbage net ball amount.