【摘要】 以天然黄波罗（ＰｈｅｌｏｄｅｎｄｒｏｎａｍｕｒｅｎｓｅＲｕｐｒ．）、水曲柳（ＦｒａｘｉｎｕｓｍａｎｄｓｈｕｒｉｃａＲｕｐｒ．）、胡桃楸（Ｊｕｇｌａｎｓｍａｎｄｓｈｕｒｉｃａｍａｘｉｍ．）三大硬阔林为研究对象，系统地分析太阳辐射能在三大硬阔林中的时空变化规律，揭示了三大硬阔林能量的主要特征。在一个生长季节内到达三大硬阔林的太阳总辐射能为２．５２×１０９Ｊ／ｍ２，光合有效辐射能为１．０１Ｊ／ｍ２，净初级生产力为１．９５×１０１１Ｊ／（ｈｍ２·ａ）。在生长季节内总辐射能的光能利用率为０．７７％，光合有效辐射能的光能利用率为１．９４％，在本地区内这样的光能利用率是不高的。更多还原

【Abstract】 The change regularity,in time and space,of solar radialion in natural phellodendron amurense,fraxinus mandshurica, and Juglans mandshurica hardwood forests was analyzed and the main charactenistics of energy enviromnent of the forests were revealed.The total solar radiation received by canopy was 2.52×10 9J/m 2 in a growth season,of which,direct solar radiation makes up 63.4% and scattered radiation was about 1.009×10 9J/m 2.The net primary productivity was 1.95×10 11 J/(hm 2·a).The utilization efficiency of total solar radiation energy was about 0.77% during growth seasons and the utilization efficiency of photosynthetic active radiation energy was estimitated at 1.94%.This photosynthesis efficiency in not very high in Chaihe area of Heilongjiang Province.更多还原