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苹果环剥后,黄叶期超过20天时,在环剥口四周每隔2cm用刀纵切一刀,刀口长度超过上下皮层0.5cm,然后把卫生纸叠成长条,蘸上 50ppm赤霉素
Apple girdling, the yellow leaves more than 20 days, around the ring around the mouth every 2cm with a knife longitudinal knife knife edge length over the upper and lower cortex 0.5cm, then the toilet paper stacked into strips, dipped in 50ppm gibberellin