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应用建立的人工同龄林辐射场模型对杉木 (Cunninghamialanceolata)人工林冠层辐射场进行了模拟 ,以实测的冠层辐射数据对模型进行了验证 ,对模型的不确定性以及叶面积密度和叶片散射的影响进行了计算和分析。结果表明 ,模拟和实测辐射场及日总量无显著差异 ,所建模型适于对杉木人工林冠层辐射的模拟。模型可能的误差来源包括树冠形状的不规则性、树冠大小和高低的不一致性、叶片在小范围内的簇生性等。考虑二维叶面积密度 (LAD)分布的模拟结果优于平均LAD。叶片的散射辐射约占总辐射的 3%～ 11%,且越靠近树冠里层和下部 ,散射作用越大。
The simulated radiation field of Cunninghamia lanceolata plantation was simulated with the established artificial radiation field model of the same age. The model was verified by the measured canopy radiation data. The uncertainty of the model, leaf area density and leaf scattering The impact was calculated and analyzed. The results showed that there was no significant difference between simulated and measured radiation field and daily total amount, and the model was suitable for simulating canopy radiation of Chinese fir plantation. Sources of possible model errors include irregular crown shapes, inconsistencies in crown size and height, and clustering of leaves in small areas. The simulation results considering the two-dimensional leaf area density (LAD) distribution outperformed the average LAD. The scattered radiation of the leaves accounts for about 3% ~ 11% of the total radiation, and the closer to the inner layer and the lower part of the crown, the greater the scattering effect.