摘要
选取具有代表性的华山松群落,对5月份到达群落的太阳总辐射、直接辐射、散射辐射、反射辐射、净辐射进行观测和研究;利用1996～1998年的气象资料,计算群落获得的太阳辐射总量;分析了群落内太阳辐射日变化规律及能量分布特点。结果表明:到达群落上层的太阳辐射为41.99×10~7 J/m^2·月,其中直接辐射为 30.23 ×10~7J/m^2·月,散射辐射为11.76×10~7J/m^2·月;生长季内华山松群落获得的总太阳辐射能为 1.68×10~9J/m^2,净辐射为 1.10×10~9J/m^2。两种不同结构的群落年净积累能量分别为7.285×10~6J/m^2·a.和4.121×10~6J/m^2·a.;以生长季内接受的太阳总辐射为基础,群落乔木层的光能利用率分别为0.434％和0.246％;以生长季内接受的太阳净辐射为基础,其光能利用率则分别为0.663％和0.375％。
The total solar radiation, direct solar radiation, scattered radiation, reflected radiation and net radiation of two kinds of Pinus armandi community in May were measured and analyzed. The summary and the diurnal courses of of solar radiation and energy distribution in the community were analyzed and calculated based on the weather data of 19% ~ 1998. The main results are as follows; the total solar radiation received by the upper canopy was 41.99×107J/m2 . mo -1. , of which the direct solar radiation was 30. 23 ×107 J/m2 . mo-1. , scattered solar radiation was 11, 76×107 J/m2 . mo-1.. The total solar radiation and net solar radiation received by Pinus armandi community during the growing season were 1. 68 X 10 J/m and 1. 10× 109J/m2 respectively. The annual energy of the two Pinus armandi community were 7.285×106J/m2 . a-1 and 4.121 ×106 J/m2.a-1 respectively. The utilization effiency of solar energy for received total solar radiation during the growing season of arbor layer in the two Pinus armandi community were 0. 434% and 0. 246% respectively. Based on the received net solar radiation during the growing season, the utilization effiency of solar energy of arbor layer in the two Pinus armandi community were 0.663% and 0.375% respectively.
出处
《西北林学院学报》
CSCD
北大核心
2003年第4期5-8,共4页
Journal of Northwest Forestry University
基金
国家林业局"十五"重点项目"陕西秦岭火地塘林区森林景观格局及其动态规律研究"(2001-04)
关键词
秦岭
华山松群落
太阳辐射
光能利用率
Qinling Mountains
Pinus armandi community
solar radiation
utilization of solar energy
