Light regime in relation to plant population geometry
Light regime in relation to plant population geometry
复制标题
光照状况与植物种群几何形状的关系
DOI：
10.1007/bf02489342
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
T. Oikawa
中科院分区：
文献类型：
--
作者：
T. Oikawa
在树叶随机分布的计算机模型中，尝试用蒙特卡罗技术进行束流发射实验。RD叶片由500片相同大小的叶片组成，其单叶面积仅为单位土地面积的1/100，即RD叶片的叶面积指数(LAI)等于5。在均匀阴天下，RD叶片的观测值与任何叶倾角和(或)叶面积密度的理论预测值之间取得了令人满意的一致性。这一结果证明了蒙特卡罗技术在本实验中的有效性。蒙特卡罗实验也适用于斑块状种群。对于这样的树叶，与相应的无限树叶中的小气候相比，侧向入射的额外影响值得注意。对于每个叶倾角，斑块状种群中层以下的平均光通量密度并没有随着叶面积指数的增加而进一步衰减。
A beam-emission experiment using a Monte Carlo technqiue was attempted in a computer model for the random distribution (RD) of foliage. The RD foliage consisted of 500 leaves of the same size, their individual areas being just 1/100 of the unit land area; i.e., a leaf area index (LAI) of RD foliage was equal to 5. Satisfactory agreement of light transmission under a uniform overcast sky was obtained between the observed values in the RD foliage and theoretical anticipations for any leaf inclination angle and/or leaf area density. This result demonstrated the usefulness of the Monte Carlo technique adopted in this experiment.The Monte Carlo experiment was also applied to a patch-like population. For such a foliage, additional effect of lateral incidence were worth noting in contrast with the microclimates in the corresponding infinite foliage. For every leaf inclination angle the mean light flux density below the middle stratum within a patch-like population was not further attenuate with increasing LAI.