- Author: LIU Li, LI Qiuli, GAO Dengtao, WEI Zhifeng, SHI Caiyun, WANG Zhiqiang, LIU Junwei
- Keywords: Peach; Zhongyou 20; Different tree shapes; Tree structure; Fruit quality; Principal compo- nent analysis
- DOI: 10.13925/j.cnki.gsxb.20210225
- Received date:
- Accepted date:
- Online date:
PDF （） Abstract（）
Abstract: 【Objective】Although peach industry in China has made great progress, yield and fruit quality improvement remains the focus of fruit research. In order to fully realize the production potential of new varieties, we examined the effects of tree shape on fruit yield and quality of Zhongyou 20 peach, hoping to select the most suitable tree shape for peach production.【Methods】The experiment was carried out in a peach orchard in Yandianzhuang village, Qiaobei Township, Yuanyang City, Henan Province. The trees were 3-year-old, and the experimental plots covered an area of 0.6 hectares. It was planted in north-south rows. The whole orchard was under unified routine soil, fertilizer and water management. Five tree shapes, including Y- shape (Y), trunk shape (Trunk), three main branch open center shape, four main branch open center shape and V-shape (V) were selected for the study. Light intensity was investigated during the canopy formation period in summer; fruit quality was investigated during fruit ripening period, and tree structure was investigated before winter pruning after defoliation. In the middle stage of canopy formation (July), light intensity at different heights (0.5 m, 1.0 m, 1.5 m, 2.0 m and 2.5 m above the ground) in the same direction of tree crown was measured at 8:00, 11:00, 14:00 and 17:00 with a TSE-1332 digital illuminance meter on sunny days for 3 times at 10-day intervals. The average valued of the results of the 4 time points within a day of the 3 measurements was taken as the light intensity value at different heights during the canopy formation period. The tree crowns with different shapes were divided into four parts: lower layer (