The yield and safety effects of sodium 4-CPA 8％SP on Myrica rubra were evaluated by field trials.The results showed that sodium 4-CPA 8％SP could regulate the growth of Myrica rubra,and promote the fruit quality.At the active ingredient dosage of 20-50 mg/kg,sodium 4-CPA 8％SP could increase the number of fruits,the single fruit weight and yield.The growth rate of fruit set number were 58.67％-102.00％,the growth rate of single fruit weight were 27.69％-42.09％,and the growth rate of yield were 4.02％-7.41％.Sodium 4-CPA had a good application prospect on Myrica rubra,it was recommended that the active ingredient dosages were 25-50 mg/kg,the amount of water was 750 L/hm2.
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