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1、赤霉素可以促控果树的生长发育 (1)提高座果率。在苹果花蕾现红期和幼果期喷施20～30毫克/千克的赤霉素。可提高座果率和增产。板栗在7月中旬喷50毫克/千克的赤霉素,间
1, gibberellin can promote the growth and development of fruit trees (1) increase the rate of fruit set. Spraying gibberellic acid 20 to 30 mg / kg in red buds and young fruits of apple buds. Can improve fruit rate and yield. Chestnut in mid-July spray 50 mg / kg of gibberellic acid, between