关键词: 桃, 开心形, 相对光照强度, 品质, 冠层

Abstract: 【OBJECTIVE】 The aim of experiment is to study the relationship between distribution of relative light intensity in canopy and fruiting and quality factors of wanmi peach. 【METHOD】Canopy were divided into 50cm×50cm×50cm cubic with bamboo and measured the difference of relative light intensity distribution, characteristic of yield distribution and fruit quality factors in different growing time and position canopy.【RESULT】The results showed that the relative light intensity decreased gradually from outside to inside and from top to down. The ratio of relative light intensity in canopy volume＜30 % was 34.25%, 30%～40% was 13%, 40%～60% was 36.5% and 60%～80% was 19.25%. The distribution of fruit were in up and middle position during 1.5m～3.0m of the canopy. 【CONCLUSION】 The regression equation of the relationship between relative light intensity distribution and fruit quality factors was set up to show that single fruit weight and soluble solids were the positive correlation with relative light intensity, and to obtain optimum value of relative light intensity was above 36.31% for good quality of peach.

Key words: Peach, Open Center Shape, Relative light intensity, Quality