›› 2019, Vol. 31 ›› Issue (11): 1855-1862.DOI: 10.3969/j.issn.1004-1524.2019.11.11

• Horticultural Science • Previous Articles     Next Articles

Effects of leaf-to-fruit ratio on pruning efficiency and leaf physiological characteristics of Kyoho grape

SHANG Jiayin1, LI Kai1, WANG Chaoxia1, JI Xian2, SUN Jianjun1, WANG Dan1, SU Hong1, TIAN Shufen1   

  1. 1. Tianjin Facility Agriculture Research Institute, Tianjin 301700, China;
    2.Tianjin Research Institute for Forestry and Pomolgy, Tianjin 300384, China
  • Received:2019-02-14 Online:2019-11-25 Published:2019-12-04

Abstract: In order to investigate the effect of different leaf-to-fruit ratio on pruning efficiency and leaf physiological characteristics of Kyoho grape, the leaf-to-fruit ratio during the grape growing season was set to 8∶1, 12∶1, 16∶1, 20∶1 treatment. From 25 days after full-bloom stage, the summer pruning time and the quality of pruning waste were investigated every 10 days for a total of 13 times. The leaves were sampled at 85 d, 95 d and 105 d after flowering to determine malondialdehyde, proline, protein, vitamin C, ascorbate peroxidase, ascorbate oxidase. Correlation analysis was used to analyze the correlation between the indicators. The results showed that the higher the leaf-to-fruit ratio, the longer the working time, the less pruning waste produced. The leaf-to-fruit ratio 8∶1 and 20∶1 treatments were more efficient. Leaf membrane lipid peroxidation level at low leaf-to-fruit ratio treatments was higher than that in high leaf-to-fruit ratio treatments. The activity of protective enzymes in high leaf-to-fruit ratio treatment was higher than that in other treatments, and the rate of leaf senescence was slower. As a result, the best leaf-to-fruit ratio was 8∶1 for Kyoho grape during the growing season.

Key words: grape, leaf-to-fruit ratio, pruning efficiency, leaf senescence

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