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以长势一致正常结果的疏散分层树形香梨树为试材,以树干为中心,将树冠在不同层次、方位分成1.0m×1.0m×1.0m立方体,测量不同部位的相对光照强度,成熟期测定不同部位的果实品质,探讨了香梨冠内光照垂直分布和水平分布下果实外观和内在品质差异。结果表明:疏散分层树形的香梨树冠内光强分布从上到下,从外到内光照强度递减;不同垂直层次与其相对光强呈显著正相关;果实质量在冠内分布与光强分布相吻合,光照强度越大的部位果实质量越好;在香梨光饱和点内,单果重、可溶性固形物、可溶性糖、花青苷含量随光照强度增大而升高,有机酸随光照强度增大而降低;下层果实光照较上中层弱,果实成熟度低,因此下层果实叶绿素含量较上中层高。
The tree species were divided into 1.0m × 1.0m × 1.0m cubes at different levels and orientations, taking the tree trunk as the center. The relative light intensity and maturity of different parts were measured The fruit quality of different parts was determined. The differences of appearance and intrinsic quality of pear under vertical and horizontal light distribution in pear were studied. The results showed that the distribution of light intensity in crown of pear tree with scattered delamination depended on the light intensity from top to bottom and light intensity decreased from the outside to the inside. There was a significant positive correlation between the light intensity of different vertical layers and the relative light intensity. In the light saturation point of pear, the content of single fruit weight, soluble solid, soluble sugar and anthocyanin increased with the increase of light intensity, while that of organic acid increased with light intensity The intensity increased and decreased; the light of the lower layer was weaker than that of the middle layer, and the fruit maturity was low, so the content of chlorophyll in the lower layer was higher than the middle layer.