苹果树冠不同区位产量分布和品质特征及其与微域光照强度的关系研究

以产量水平分别为300004、5000和60000 kg/hm2的富士苹果为试材,研究了树冠不同区位产量分布和品质特征及其与微域光照强度的关系。结果表明:产量主要分布在树冠第2层和第3层的次外层区位;着色指数基本呈上层区位>下层区位、外围区位>中部区位>内膛区位的变化规律;产量30000 kg/hm2的树冠第1层、第2层和第3层各区位从外围向内膛可溶性固形物含量逐渐减小;产量60000 kg/hm2的可溶性固形物含量在树冠垂直方向上,随树冠高度的增加,总体呈上升趋势;光照强度呈上层区位>下层区位、外围区位>中部区位>内膛区位的变化规律;果实数量和产量与枝量和叶量呈极显著正相关;产量30000 kg/hm2的可溶性固形物含量与枝量和叶量呈显著正相关;光照强度与着色指数的相关性达到极显著水平。

Fruit Yield Distribution and Quality Characteristics at Different Locations of Apple Crown and Their Relationships with Microscale Light Intensity

The fruit yield distribution and quality characteristics at different locations of apple crown and their relationships with the microscale light intensity were studied by using Fuji apple with different yield levels（30000,45000 and 60000 kg/hm^2） as the tested materials.The results showed that the yield mainly distributed on the second and third outer layer crown.The coloring index basically presented the following regulation： upper stratum lower strata,and periphery central section inside zone.For Fuji apple with the yield of 30000 kg/hm^2,the content of soluble solid in the fruits decreased gradually from periphery to inside zone of the first,second and third layer crown.For Fuji apple with the yield of 60000 kg/hm^2,the content of soluble solid in the fruits generally increased along with the increase of crown height.The regulation of light intensity was upper stratum lower strata,and periphery central section inside zone.The number and yield of the fruit were significantly positively correlated with the number of branches and leaves.When the yield was 30000 kg/hm^2,the content of soluble solid was significantly positively correlated with the number of branches and leaves.There was significantly positive correlation between light intensity and coloring index.