日本落叶松林冠层光生态场研究

Light-ecological field of Larix leoptolois canopy.

从生态场理论出发 ,运用邻体干扰模型和遮光影响的方法 ,研究了日本落叶松林冠层光生态场 .根据不同生长级林木之间遮光影响 ,编制了林木遮光系数表 .提出了不同生长级林木间遮光模型 .结果表明 ,7∶0 0～ 1 7∶0 0日本落叶松单冠连续投影是 1个以东西为长轴、南北为短轴的近椭圆形 ;林分内每株树木受到的遮光强度等于近椭圆范围内其它林木对其的遮光和 ;林木受到的遮光强度愈大 ,其光生态效应愈强 ,生长发育愈差 .

The light ecological field of Larix leoptolois canopy is studied by means of neighboring disturbed models and shading effect method. Based on shading effect among various growth classes of Larix leoptolois, the shading coefficient table is drawn up,and the shading models of different growth classes are put forward.The results show that the projection of single Larix leoptolo is canopy is an ellipse with east west as its long axis, and south north as its short axis between 7 am to 5 pm. The individual plant shading intensity is the sum of the shading effects of other trees within the ellipse in the forest. The higher the shading field intensity, the stronger the light ecological effect, and the worse the tree growth.