帽儿山林场樟子松人工林光辐射分布的研究

以东北林业大学帽儿山实验林场老山施业区内的樟子松人工林为研究对象，运用WinSCANOPY2006a冠层分析仪采集数据，并结合实地调查，实测5种林龄的樟子松人工林群落内光辐射特征及冠层参数。结果表明：立地条件基本一致的情况下，樟子松人工林内光辐射随林龄增大呈下降趋势，变化范围为8．8－12．32mol·m^-2·d^-1，平均占冠层顶部总辐射的21．21％。对光的吸收能力逐渐增强且树龄为30a以后趋于稳定。林分开阔度的变化范围为10．78％～21．66％，不同林龄群落之间差异显著，随林龄增大而下降。叶面积指数变化范围为2．29～3．47，不同林龄群落之间差异不显著。消光系数（＆）的变化范围为0．47～0．63，消光能力随林龄增大而增强，冠层结构随林龄的变化对消光能力的变化有一定得影响．

Study on Optical Radiation Distribution in Pinus sylvestris Plantation of Mao'er Mountain Forest Farm

Taking the Pinus sylverstris plantation in Laoshan circle unit of Mao'er Mountain forest farm attached to Northeast Forestry University as study object,the optical radiation characteristics and canypy parameters of Pinus sylverstris plantation community at five kinds of ages were measured based on field surveys and the data collected by WinSCANOPY2006 a canopy analyzer,so as to reveal the light conditions in Pinus sylverstris plantation community.The results showed that when in the same site quality,the opt...