用净光合速率评价森林立地质量的可行性  

EVALUATION OF SITE QUALITY WITH NET PHOTOSYNTHETIC RATE

作　　者：冯玉龙[1] 李继武[1] 王文章[1] 陈杰[1] 

机构地区：[1]东北林业大学

出　　处：《东北林业大学学报》1996年第6期80-84,共5页Journal of Northeast Forestry University

基　　金：国家"七五"攻关科技项目"不同立地防护林树种生理生态特性的研究"的部分研究成果

摘　　要：用Ｂｅｃｋｍａｎ８６５型红外线ＣＯ２分析仪测定了三种不同森林立地区八种不同土壤类型上生长的杨树（小×黑）的净光合速率。结果表明，生长在各立地条件下杨树树冠四个方向的净光合速率不同，生长在同一森林立地区中不同土壤类型上的杨树净光合速率不同，生长在不同森林立地区中杨树的净光合速率也不同。生长在３２区、４１区和５区中杨树树冠四个方向的平均净光合速率分别为０．２１７８、０．１７４２、０．１３４８ｍｇｍ－２ｓ－１。在相同气候条件下，净光合速率的差异反映了土壤肥力的不同；在不同立地区间，净光合速率的差异反映了立地的好坏。杨树净光合速率的大小与其立地质量密切相关，因此。Net photosynthetic rates of pseudo-simolii×P nigra were measured with Beckman Model-865 Infrared CO 2 Analyzor, which grew at eight different soil types of three kinds of forest site districts The results showed that: the net photosynthetic rates of different direction of crown of populus growing at each site condition were different; the net photosynthetic rate of populus growing at different soil types of the same forest site district were different; and the net photosynthetic rate of populus growing at different forest site districts were different too The average net photosynthetic rate of four direction of crown of pupulus growing at 3 2, 4 1 and 5 district were 0 217 8, 0 174 2 and 0 134 8 mg·m -2 ·s -1 respectively At the same climatic condition net photosynthetic rate of populus reflected soil fertility At different forest site districts the net photosynthetic rate of populus reflected site quality Site quality had a direct bearing on net photosynthetic rate of populus The order of net potosynthetic rate of populus from big to small was the same as that of site quality from good to bad Net photosythetic rate was used to evaluate site quality first time and the feasibity of net photosynthetic rate indes was discussed theoretically

关 键 词：净光合速率 立地质量 评价 

分 类 号：S718.5[农业科学—林学]