Effects of summer pruning on branch growth and fruit quality of blueberry
The 3-year-old potted blueberry variety H5 was planted in a steel frame rain shel-ter.The primary and secondary branches were short cutted with 2～3 buds on June 10 and June 30,2022 respectively.On July 20,the third branches were short cutted with 5 kinds of retained branch length of 10,15,20,25 and 30 cm,respectively.The growth and development,fruiting and fruit quality of fourth branches under different treatments were studied.The results showed that the fruit number per plant,yield per plant of blueberry treated,the total sugar,sucrose,fructose,glucose,sugar-acid ratio,vitamin C and total anthocyanin content with 30 cm retained branch length of third branch were the highest,which were significantly higher than those of other treatments.The content of total flavonol was significantly higher than that of the control,and the total acid and citric acid were significantly lower than other treatments.The number of branches per branch,branch length,average fruit weight and fruit firmness of blueberry treated with 15 cm retained branch length of third branch were the highest.The number of fruit per branch and the content of total acid,citric acid and quinic acid of blueberry treated with 25 cm retained branch length of third branch were the highest.It is considered that the short cutting treatment with the length of 30 cm of the third branch has the best effect on the growth and development of blueberry branches and fruit quality.
万方数据
维普
