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以‘库尔勒香梨’为研究对象,通过将树冠进行分格,对冠层内不同部位的光照强度、果实产量与品质进行测定,分析光照强度及产量品质差异,以期探讨‘库尔勒香梨’冠层内不同部位光照强度差异及其与果实产量和品质的关系,为树冠整形修剪提供理论依据。结果表明:树冠不同层次相对光照强度从上到下逐渐降低,从内膛到外围逐渐增大;相对光照强度小于30%的区域主要集中在树冠下部。果实主要分布在光照条件较好的1.5~3.0m冠层内,果实单果重、硬度、维生素C含量、可溶性固形物含量均与相对光照强度呈正相关;应用多元统计分析方法,建立了果实产量、品质与相对光照强度关系的回归方程,获得了果实产量和良好品质因素所需的相对光照强度分别是:产量72.48%、单果重62.33%、果形指数52.88%、硬度45.91%、维生素C含量52.28%、可溶性固形物含量59.53%以及可滴定酸含量66.44%;因此,冠层内的光照分布与果实的产量品质密切相关,光照强度较高的树冠中上层和外围果实产量较高、品质较好;该试验表明,调节树冠内光照均匀分布,有利于提高果实的商品率。
Taking ’Korla fragrant pear’ as the research object, the light intensity and fruit yield and quality of different parts of the canopy were determined by dividing the canopy. The differences of light intensity and yield and quality were analyzed in order to explore the ’Korla pear’ crown The difference of light intensity in different parts of the layer and its relationship with the yield and quality of the fruit provided the theoretical basis for crown pruning. The results showed that the relative light intensity of different levels of canopy decreased gradually from top to bottom, and gradually increased from the bore to the periphery. The area with relative light intensity less than 30% mainly concentrated in the lower part of canopy. The fruits were mainly distributed in the 1.5 ~ 3.0m canopy with good light conditions. Fruit weight, hardness, vitamin C content and soluble solids content were positively correlated with relative light intensity. Multivariate statistical analysis was used to establish the fruit yield, The relative light intensity of the relationship between quality and relative light intensity was 72.48% of yield, 62.33% of fruit weight, 52.88% of fruit shape index, 45.91% of hardness and 52.28 of vitamin C content %, Soluble solids content 59.53%, and titratable acid content 66.44%. Therefore, the light distribution in the canopy is closely related to the yield and quality of the fruit. The yield and quality of the middle and upper canopy of crown with higher light intensity are higher ; This experiment shows that the regulation of uniform distribution of light inside the canopy is conducive to improving the commercial rate of fruit.