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在两种除组成和垂直结构外,其它条件均相同的人工阔叶红松林内,做了总辐射、反射、透射、生物量、生产力和林分叶面积的测定。证明在红松与阔叶树复层混交,叶面积指数为5.5的林分内,光能利用率,林分的生物量、生产力和叶面积分布等均较二者单层混交,叶面积指数为4.1的林分为高或者合理。其原因在于前者能有效地吸收和利用太阳辐射能,减少能量的散失,该林分较高的叶面积指数也是提高其林分的生长速度和森林生产力的重要原因。
The total radiant, reflectance, transpiration, biomass, productivity, and stand leaf area were measured in two broad-leaved Korean pine forests of the same composition except for the composition and vertical structure. It was proved that the light energy utilization rate, stand biomass, productivity and leaf area distribution were all more than the single layer mixed with the mixed layer of Korean pine and broadleaf tree with leaf area index of 5.5. Leaf area index was 4.1 The forest is divided into high or reasonable. The reason is that the former can effectively absorb and utilize the solar radiation energy and reduce the energy loss, and the higher leaf area index of the stand is also an important reason for increasing its stand growth rate and forest productivity.