亚热带人工针叶林光能利用效率的差异  

Difference in Light Use Efficiency of Subtropical Coniferous Plantation

作　　者：张秀娟[1] 韩海荣[1] 王军邦[2] 

机构地区：[1]北京林业大学,北京100083 [2]中国科学院地理科学与资源研究所

出　　处：《东北林业大学学报》2010年第12期12-14,共3页Journal of Northeast Forestry University

基　　金：国家重点基础研究发展计划(2009CB421105);国家自然科学基金项目(30500064;40501048)

摘　　要：以我国南方主要造林树种湿地松(Pinus elliottii)、马尾松(P.massoniana)和杉木(Cunninghamia lanceolata)为对象,比较和分析了3种人工针叶林的光能利用效率。结果表明,当以热能百分比表示光能利用效率时,湿地松、马尾松和杉木林分的光能利用效率分别为0.36%、0.44%和0.76%;当以单位热能转化生物量来表示光能利用效率时,3种林分的光能利用效率分别为0.18、0.20和0.34 g.M J-1,杉木的光能利用效率极显著地高于湿地松和马尾松(P<0.01)。因此,采用光能利用效率模型准确估算本地区区域尺度的净初级生产力应区分不同人工针叶林树种。Light use efficiency of three plantations of Pinus elliottii,P.massoniana and Cunninghamia lanceolata,the main tree species planted in subtropical region of South China,was analysed.Results showed that,when light use efficiency was expressed as energy percentage,the light use efficiency values of P.elliottii,P.massoniana and C.lanceolata were 0.36%,0.44% and 0.76%,respectively,whereas those of the three plantations were 0.18,0.20,and 0.34 g·MJ-1,respectively,when light use efficiency was expressed as biomass transformed from per unit of energy.Light use efficiency of C.lanceolata forest was significantly higher than that of P.elliottii and P.massoniana forests.Therefore,different tree species should be distinguished to accurately estimate net primary productivity of coniferous plantations by light use efficiency models.

关 键 词：人工针叶林 光能利用效率 叶面积指数 湿地松 马尾松 杉木 

分 类 号：S718.512.2[农业科学—林学]