立地条件对长白落叶松光合特性的影响  

Photosynthesis Characteristics of Larix olgensis under Different Site Conditions

作　　者：马华文[1] 许翠清[1] 李海朝[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2008年第8期4-7,共4页Journal of Northeast Forestry University

基　　金：黑龙江省科技计划项目(GA06B301-5);国家"948"项目(2003410)

摘　　要：采用LI-6400便携式光合测定系统测定了黑龙江省佳木斯市孟家岗林场不同立地条件、不同林龄组长白落叶松的光-光合速率曲线。结果表明,长白落叶松最大净光合速率、光补偿点、光饱和点和表观量子效率受针叶朝向(阳生叶和阴生叶)、立地条件和林龄的影响而表现出不同:除近熟林立地指数为15的阳生叶和阴生叶在最大净光合速率和光补偿点方面存在显著差异外,其余林龄相同立地指数的阳生叶和阴生叶在最大净光合速率、光补偿点、光饱和点和表观量子效率方面均无显著差异;幼龄林、中龄林和近熟林的阳生叶和阴生叶在最大净光合速率、光补偿点、光饱和点和表观量子效率方面受立地条件的影响均不显著;阳生叶和阴生叶在最大净光合速率、光补偿点、光饱和点和表观量子效率方面受林龄的影响均不显著。The light response curves of young, middle-aged and near-mature Larix olgensis Henry, grown in different site conditions of Mengjiagang Forestry Centre in Kiamusze City, were measured with LI-6400 portable photosynthesis system. Resuits show that the effects of conifer needle position in crown （sun conifer needle and shade conifer needle） , site conditions and forest age on maximum net photosynthetic rate （ Pmax ）, light compensated point （ LCP）, light saturated point （LSP） and apparent quantum efficiency （QUE） of larch are different. There is no significant difference in Pmax, LCP, LSP, and QUE between sun conifer needle and shade conifer needle from larch plantations with the same forest-age under the same site-index, except for the significant differences in Pmax and LCP between sun conifer needle and shade conifer needle from near-mature larch plantation grown in 15 site index. The effects of site conditions on Pmax, LCP, LSP and QUE of young, middle-agedd and near-mature larch plantations are not marked. The effects of forest age on P LCP, LSP and QUE of sun conifer and shade conifer are not obvious.

关 键 词：长白落叶松 最大净光合速率 光补偿点 光饱和点 表观量子效率 

分 类 号：S791.229[农业科学—林木遗传育种]