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以玉屏大板栗为材料，探索了树冠内光能分布特征，以及光能分布对叶片形态、结构和座果的影响。结果表明，大阳光能穿透叶幕层时，光强消减规律合符Ｂｅｅｒ－Ｌａｍｂｅｒｔ公式，８年生植株的关系式为Ｉ＝Ｉ０ｅ－０．４４５９Ｆ，而１５年生植株的关系式为Ｉ＝Ｉ０ｅ－０．４４２８Ｆ。叶幕内的光能分布主要受累计叶面积指数和自然光强的影响。随着叶幕光强的降低，单叶面积，叶片与所座生枝条夹角变大，叶片厚度、表皮厚度、栅栏组织厚度、栅栏细胞层数及栅栏细胞宽长比降低。海绵组织孔隙度增加，但海绵组织厚度、海绵细胞形状变化不大。叶幕内的光能分布对总艺的分布也有重大影响，８年生植株总苞主要分布于相对光强１３％以上的叶幕层，而１５年生植株总艺主要集中于相对光强１０％以上的叶幕层。另外，还探讨了生产上合理的树体特征。
Taking Yuping large chestnut as material, the light energy distribution in canopy and the influence of light energy distribution on the shape, structure and fruit setting of leaves were explored. The results showed that when the sunlight penetrates the leaf layer, the law of light intensity reduction is consistent with the Beer-Lambert formula. The relationship between the 8-year-old plants is I = I0e-0.4459F, while the relationship between the 15-year-old plants is I = I0e -0.4428F. The distribution of light energy inside the leaves is mainly affected by the accumulated leaf area index and natural light intensity. With the decrease of leaf light intensity, the angle between the leaves and the branches of the living leaves became larger, and the leaf thickness, the epidermis thickness, the thickness of the palisade tissue, the number of the palisade cells and the palisade cell length-length ratio decreased. Sponge tissue porosity increased, but sponge tissue thickness, sponge cell shape change little. The distribution of light energy within the leaf curtain also had a significant impact on the distribution of the whole art. The involucre of the 8-year-old plants mainly distributed in the leaf curtain with relative light intensity above 13%, while the 15-year-old plants mainly concentrated in the relative light intensity above 10% Leaf curtain layer. In addition, reasonable tree characteristics of production are explored.