新红星苹果丰产稳产树的光合特征

Photosynthetic Characteristics of High Productive Regular-Bearing Starkrimson Apple Trees

以成龄新红果苹果树为试材研究证明,丰产稳产树较低产树和变产树在光合性能方面有以下特点:1.树冠叶幕外层面积较大;2.叶幕中层光照状况较好;3.叶幕中层净光合速率高,且外、中层净光合速率相对稳定;在所有测定时期整株净光合速率高。

Mature apple trees cv Starkrimson were used for studing some photosynthetic characteristics of high productive regular-bearing trees. The results suggested that comparing with low productive alternate-bearing trees,the photosynthetic characteristics of high productive regular-bearing trees are as follows: (1)The leaf area of outer part of the canopy is larger. (2)The illumination conditions in the medium part of the canopy is more superior. (3)The net photosynthetic rate of the leaf either in the medium part or in the outer part of the canopy is higher and more stable. (4)The net photosynthetic rate of total tree leaf system is higher at all tested stages.