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锦橙树冠内各部位光能分布差异显著。光照对光合效应、结果和果实品质有明显的影响。在重庆地区11:00～11:30时,相对光照率南部>东部>西部>北部,15:00～5:30时则南部>西部>北部>东部。全天光强度均为叶幕外层>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。各方位不同高度叶幕层的着果率与相对光照率呈极显著正相关。中层单果重分别比上、下层果高10%～26%和20.5%～52.9%。果实 Vc 含量,叶幕中层>上层>下层。固形物含量与光照率变化势相似。可食率、果酸变化与单果重相反。
The distribution of light energy in each part of the tree was significantly different. Photosynthesis light effects, the results and the quality of fruits have a significant impact. At 11: 00-11: 30 in Chongqing area, the relative light intensity was south> east> western> northern and 15:00 ~ 5:30 pm while southern> western> northern> eastern. All day light intensity is the outer curtain> inner> canopy center, leaf curtain upper> middle> lower. Net photosynthetic rate, photosynthetic output rate and yield and light with a similar trend. The fruit rate of leaf layers at different heights and the relative irradiance were significantly and positively correlated. The middle fruit weight was 10% ~ 26% and 20.5% ~ 52.9% higher than that of the upper and lower layers, respectively. Fruit Vc content, leaf curtain middle> upper> lower. Solids content and illumination rate change potential similar. Edible rate, acid changes and fruit weight on the contrary.