| 鹤山乡土混交林的能量特征及光能利用率 |
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| 引用本文： | 任海,彭少麟,余作岳,蔡锡安.鹤山乡土混交林的能量特征及光能利用率[J].中国科学院研究生院学报,1996(1). |
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| 作者姓名： | 任海 彭少麟 余作岳 蔡锡安 |
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| 作者单位： | 中国科学院华南植物研究所 |
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| 基金项目： | 国家自然科学基金,中国科学院重中之重06项目 |
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| 摘 要： | 通过对鹤山以红荷和荷木为主的乡土树种混交林的辐射能、光合呼吸作用与总第一性生产力、生物量与热值等的综合研究可知：１全年抵达该群落林冠上层的总太阳辐射能４５１５．２ＭＪ·ｍ－２，截获２５１９．３ＭＪ·ｍ－２，透过１４７２．２ｍＪ·ｍ－２；２群落总的生物量１０３．３１ｔ；能量现存量１７１．３３ＭＪ·ｍ－２；３群落冠层截获能量中有８６．８０ＭＪ·ｍ－２用于光合作用，其中有２１．７１ＭＪ·ｍ－２用于净第一性生产力；其光能利用效率约０．４８％；４由于群落年龄和冠层结构原因，鹤山乡土树种混交林群落的生物量现存量、净第一性生产力和光能截获率均低于同地带近顶极群落一季风常绿阔叶林的相应值．
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| 关 键 词： | 辐射能，生物量与热值，总第一性生产力，乡土树种混交林 |
Energy Flux Characteristics and Solar Radiation Utilization Efficiency of the Native Species Mixed Forest in Heshan |
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| Ren Hai,Peng Shao-lin,Yu Zuo-yue,Cai Xi-an.Energy Flux Characteristics and Solar Radiation Utilization Efficiency of the Native Species Mixed Forest in Heshan[J].Journal of the Graduate School of the Chinese Academy of Sciences,1996(1). |
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| Authors: | Ren Hai Peng Shao-lin Yu Zuo-yue Cai Xi-an |
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| Abstract: | Radiation components,phtotsynthesis, respiration, primary productivity,biomass,caloric value and energy use efficiency were measured over a Native species mixed forest at Heshan, Guangdong, South China. The major conclusion are as follows:1. The amount of gross solar radiation reaching the canopy layer was 4515.2M J/m2, the radiation energy reaching the forest land through the canopy was 1472.2 MJ/m2, only 2519.3 M J/m2 was intercepted by the canopy. 2. The standing crop energy and net energy production of the artificial forest was 171 .33 M J/m2 and 14 .20 M J/m2 respectively. The amount of energy fixation varied with plant species and organs, in which 46.1% was in the stem,20.5% in the root, 19.2% in the leaf and only 14.2% in branch.3. The amount of photosythesis was 86.80 M J/m2, in which only 21 .71M J/m2 was used in net primary productivity. The solar radiation utilization efficiency was 0. 48 %.4. The canopy structure, nc t primary production and radiation energy absorptance of the mixed forest were better (or higher) than that of the monsoon ever-green broad-leafed forest. |
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| Keywords: | radiation energy components biomass and caloric value nativespecies mixed forest |
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