树木冠层消光度与三维绿量的关系

Relationship between the extinction ratio of tree canopy and tridimensional green biomass

利用野外调查和实地测量的方法,从植物群落和单株树木两个方面研究树木冠层消光度与其三维绿量的关系。结果表明:冠层消光度与其三维绿量之间的相关性达到极显著水平,在群落水平上,群落内的郁闭度和群落面积与冠层消光度之间都呈现明显的正相关,而乔木层的消光度与灌木层的消光度呈现明显的负相关,树木在单株水平下,冠层的消光度与树木枝下高呈现明显的负相关。因此,可用冠层消光作为衡量树木三维绿量的指标。

Using the methods of field investigation and field measurement, we study the relationship between extinction ratio of tree canopy and tridimensional green biomass. The result shows that the correlation between canopy extinction and tridimensional green biomass reaches extremely significant level. At community level, there is a significant correlation between the community within the canopy density and community area and canopy extinction ratio. But the extinction ratios of tree layer opacity and of shrub layer opacity of the show a significantly negative correlation. At individual level, the extinction ratios of canopy and under branch height show a significantly negative correlation. Therefore, the extinction ratio of tree canopy can be used as a measure of tridimensional green biomass.