Effects of Paclobutrazol on Fruit,Seed and Leaf Related Indexes of'Jinxiu'Yellow Peach
This study investigated the effects of applying different concentrations of paclobutrazol to soil on the fruit,seed,and leaf related indi-cators of the'Jinxiu'yellow peach.In spring,paclobutrazol 2.5 g/tree(treatment ①)and 5 g/tree(treatment ②)was applied to the annular groove of'Jinxiu'yellow peach trees,while the control was left untreated.When the fruit has reached maturity,study pertinent indicators.The results showed that both treatments enhanced fruit production,yield,and the proportion of small and medium-sized fruits,while reducing the proportion of large fruits.Both treatments resulted in a decrease in average fruit weight,an increase in fruit shape index(longitudinal length/transverse diameter),and an increase in pulp sugar and acid content;however,fruit quality was not enhanced.Treatment ② enhanced the fresh weight and dried weight of seed embryos considerably.In both treatments,leaf area and single leaf weight decreased,although specific leaf weight was less impacted.Both treatments increased leaf nitrogen content while decreasing phosphorus and potassium levels.The soil applica-tion of paclobutrazol could increase fruit yield but did not improve the fruit quality of'Jinxiu'yellow peaches.This may be due to its negative impacts on leaf area,phosphorus,and potassium levels.During fruit production,the usage of paclobutrazol should be restricted or avoided.In addition,alternatives to paclobutrazol should be employed for cultivation and management.
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