【摘要】 以黑龙江省帽儿山地区28年生的红松人工林为研究对象,对到达林冠作用层的太阳总辐射、直接辐射、散射辐射以及林分辐射平衡的日变化和季节变化规律分别进行了详细分析,揭示了红松人工林的能量环境特点。在一个生长季内到达红松人工林林冠上层的太阳总辐射为2580.64MJ/m~2,其中直接辐射为1508.52MJ/m~2,散射辐射为1072.12MJ/m~2;透过林冠到达林地的太阳辐射为277.25MJ/m~2,透射率为10.74％。森林通过光合作用固定下来的有机物以生物能量表示的年净生产量为16.89MJ/m~2,生长季内系统接受的太阳净辐射为1091.88MJ/m~2,从而推算出以生长季内太阳净辐射为基础的红松人工林的光能利用率为1.55％。更多还原

【Abstract】 This investigation carried out with the 28-year-old Korean Pine plantation in Maoershan area of Heilongjiang Province. The paper revealed the character of energy environment in Korean Pine Plantation. The total solar radiations reaching the canopy class were discussed respectively and the daily and seasonal regulations of radiation in the forest were analyzed in detail. The solar radiation received by canopy is about 2580.64MJ/m~2 in growth season, of which, direct solar radiation makes up 1508.52 MJ / m~2 and scattered radiation counts for 1072.12 MJ / m~2. The radiation energy reaching the forest land surface through the canopy were 277.25 MJ/m~2, with a transmisity of about 10.74％. The net production formed by photosynthesis of forest is 16.89 MJ/m~2 and the net radiation reception by the ecosystem comes to 1091.88 MJ/m~2 daring growth seasons, therefore the utilization efficiency of solar radiation energy is derived at about 1.55％ as to the kind of stand (korean pine plantation).更多还原