甜柿树冠光能分布对光合效应与结实的影响  

EFFECTS OF LIGHT DISTRIBUTION IN THE CROWN OF PERSIMON TREE ON ITS PHOTOSYNTHESIS

作　　者：欧毅[1] 王进[1] 王玉霞[1] 唐晓华[1] 王银合 刘圣维[1] 周贤文 

机构地区：[1]重庆市果树研究所,重庆江津402260 [2]重庆市万盛区农业局,重庆万盛400800 [3]重庆市开县农业局,重庆开县405400

出　　处：《西南农业大学学报（自然科学版）》2005年第1期69-72,共4页Journal of Southwest Agricultural University

基　　金：重庆市科委攻关项目(2000-6113)资助课题

摘　　要：甜柿树冠内不同部位光能分布差异显著.光照对光合效应、树体生长结果和果实品质有明显的影响.重庆地区11:00～11:30时,相对光照率南部＞东部＞西部＞北部;16:00～16:30时则南部＞西部＞北部＞东部.全天光照度均为叶幕外层＞内层＞树冠中心,叶幕上层＞中层＞下层.净光合速率、光合产物输出率及产量与光照有相似的变化趋势.相同方位不同高度叶幕层的着果率与相对光照率呈极显著相关.树冠各部位果实品质由于光照分布不同存在着明显的差异.Light intensity differs significantly with the location within the crown of the persimmon trees. Illumination has substantial effect on photosynthesis and growth of the tree and on the quality of the fruit. Light intensity in the crown appears in the order of south > east > west > north in 11:00-13:30 and south > west > north > east in 16:00-16:30 in the region around Chongqing. Light intensity during the day appears in the order of outer layer > inner layer > center and upper layer > middle layer > lower layer of the crown. Net photosynthesis, photosynthetic product output rate and yield show a similar tendency to light intensity. Fruit - set is significantly correlated with light intensity in the same direction. Fruit quality varies significantly in different positions in the crown owing to difference in light intensity.

关 键 词：甜柿 光能分布 光合作用 果实品质 

分 类 号：S665.201[农业科学—果树学]