蜜梨不同树形及部位相对光强对果实产量和品质的影响

以蜜梨为试材,研究了3种树形内外部位的光分布对蜜梨果实产量和品质的影响.结果表明:3种树形不同部位相对光强的变化趋势相同,均为由外向内依次递减;小冠自由纺锤形各部位的平均相对光强明显高于中冠分层开心形和大冠疏散改造形,由此导致了单位面积产量和果品质量差异明显;分层形和疏散形的产量集中分布在树冠的外层和次外层,显著高于次内层和内层.与之相比较,纺锤形各部位间的产量相对较平衡.3种树形优质果率依次为纺锤形72.4%、分层形65.7%和疏散改造形62.6%.

The Effects of Different Training Systems and Sunlight Intensity on the Yield and Quality of Mili Pear Fruit

The sunlight intensity distribution in three training systems of Mili pear was studied. The results indicated that the sunlight intensity was all degressive from the exterior to the interior in three training systems of spindle-shaped system, open-center system and modified scatter system. The average of sunlight intensity in spindle-shaped system is higher than open-center system and modified scatter system clearly, leading to the obviously difference in yield of unit area and fruit quality. The yield mainly centralized in exterior or hypo-exterior of the crown in open-center system and modified scatter system and obviously higher than interior or hypo-interior, while the yield of all sites in spindle-shaped system was balanced relatively. The rate of high fruit quality in spindle-shaped system, open-center system and modified scatter system is 72. 4%, 65.7% and 62. 6%, respectively.