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根据对林冠上方和林下太阳辐射的观测及气象站资料,分析了长白山阔叶红松林太阳辐射分光谱特征.结果表明,长白山阔叶红松林区太阳总辐射、直接辐射、散射辐射的光合有效辐射系数有一定的日变化和年变化,年平均值分别为046、043、056.阔叶红松林中不同树种的单叶对于太阳总辐射的反射率、透射率、吸收率的平均值分别为270%、234%、496%.单叶的分光谱反射、透射和吸收的特点是,单叶对紫外辐射几乎全部吸收;对光合有效辐射的吸收也很大(718%),透射很小(96%),有一定的反射(186%);对近红外辐射、反射率和透射率接近吸收率小些(269%).林冠分光谱辐射特点是,可见光和紫外辐射主要被林冠吸收(939%、941%),有少量反射和透过;林冠对近红外辐射的吸收较大(592%),有一定的反射(263%),透过较少(144%).
The spectral characteristics of solar radiation in broad-leaved Korean pine forest in Changbai Mountain were analyzed based on observations of solar radiation above and below the forest canopy and weather stations.The results showed that the solar radiation of direct solar radiation and scattered radiation Emissivity has some diurnal variation and annual change, the average annual values are respectively 046,043,056. The average reflectance, transmissivity and absorptance of single leaf of different tree species in broad-leaved Korean pine forest are 270%, 234%, 496% .The spectral reflectance, transmissibility and absorption of single leaves are characterized by almost all single UV radiation absorption; the absorption of photosynthetically active radiation is also very large (718% 96%), with a certain reflection (186%); near-infrared radiation, reflectivity and transmittance close to the absorption rate of the smaller (269%). Canopy spectral radiation is characterized by visible and ultraviolet radiation is mainly absorbed by the canopy %, 941%), with a small amount of reflection and transmission. The canopy absorbs near infrared radiation more (592%), with a certain reflection (263%) and less transmission (144%).