通过对红星苹果单叶的光-光合作用特征的测定和分析,了解了其光合量随光强变化的规律;在调查苹果树冠内辐照度分布规律的基础上,提出了采用银色地膜覆盖增加苹果树冠内辐照度,改善树冠的受光条件,从而增加树冠的光合量,提高苹果的单果重和总产量.此外,还观察到银膜覆盖使果实的品质有较大的改善. Through measuring and analyzing the light-photosynthesis characteristics of single leaf of red star apple, the law of its photosynthesis with light intensity was obtained. On the basis of investigating the distribution of irradiance in apple tree crown, The irradiance of apple canopy improved the light receiving condition of the canopy, thus increasing the photosynthetic capacity of the canopy and improving the fruit weight and total yield of the apple.In addition, it was also observed that the coverage of the silver film improved the quality of the fruit.