叶果比对巨峰葡萄修剪效率及叶片生理特性的影响

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

为了探讨不同叶果比对巨峰葡萄生长季修剪效率和叶片生理特性的影响,将葡萄生长季的叶果比设置为8∶1、12∶1、16∶1、20∶1等4个修剪处理。自花后25d开始,每10d调查一次夏季修剪工作时间和修剪废弃物质量,共13次;分别在花后85、95和105d采集叶片,测定叶片的丙二醛、脯氨酸、蛋白质、抗坏血酸、抗坏血酸过氧化物酶、抗坏血酸氧化酶等指标,并进行各指标间的相关性分析。结果表明:在巨峰生长季修剪,叶果比越高,修剪所需的总工作时间越长,而产生的修剪废弃物越少;低叶果比的修剪处理使叶片膜脂过氧化程度更高;高叶果比的修剪处理中,保护性酶类活性更高,叶片衰老速率更慢。综合各项指标,巨峰的修剪管理采用叶果比8∶1较好。

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.