落叶松林内4种栽培幼树的光合特性  

Photosynthetic Characteristics of Four Species of Saplings Planted in Larix olgensis Forest

作　　者：商士达[1] 殷鸣放[1] 吴春雷[1] 吴可[1] 高尚军 孙衍辉[2] 梁海龙[2] 高玉华[2] 

机构地区：[1]沈阳农业大学,沈阳110161 [2]清原县大边沟林场

出　　处：《东北林业大学学报》2010年第7期36-38,共3页Journal of Northeast Forestry University

基　　金：国家林业局“948”项目(20090447)

摘　　要：应用Li-6400光合分析仪,对不同采伐类型1型(采伐2行落叶松保留2行落叶松)和2型(采伐3行保留3行)的长白落叶松林下人工更新的幼树红松、云杉、北美乔松、白桦的光和特性进行了测定。结果表明,4种幼树的光响应曲线符合三元回归方程模型;各幼树的光补偿点和光饱和点差异不显著;2型中各幼树的表观量子效率的数值好于1型;云杉、红松、北美乔松的光响应曲线最大净光合速率数值,2型均大于1型,白桦则是1型好于2型;云杉、红松、北美乔松的净光合速率日变化曲线是单峰曲线,1型的峰值出现在10:00左右,2型的峰值出现在12:00左右,相同树种同一时刻的净光合速率数值2型好于1型;白桦的净光合速率日变化曲线是双峰曲线,峰值出现在上午10:00和14:00左右,同一时刻的净光合速率数值1型大于2型。A study was conducted to determine the photosynthetic characteristics of Pinus koraiensis,Picea koraiensis,Pinus strobes,and Betula platyphylla saplings planted in a Larix olgensis forest under two different cutting styles （cut two rows and leave two rows （type 1） and cut three rows and leave three rows （type 2） ） using Licor-6400. Results showed that the light response curves of the four species of saplings were consistent with the model of ternary regression equation. The light compensation point and light saturation point of different saplings did not show significant difference. The apparent quantum efficiency of every species of saplings for type 2 was better than that for type 1. The maximum net photosynthetic rates in light response curves of P. koraiensis,P. koraiensis and P. strobus for type 2 were higher than those for type 1,however the result for B. platyphylla was opposite. The diurnal variations of net photosynthetic rates of P. koraiensis,P. koraiensis and P. strobus could be expressed by unimodal curves,and the peak appeared at around 10：00am for type 1 while it happened at noon for type 2. For the same species at the same time of a day,the net photosynthetic rate was higher for type 2. The diurnal variation of net photosynthetic rate of B. platyphylla could be expressed by a bimodal curve with a peak during 10：00am and 14：00pm,and the net photosynthetic rate was higher for type 1.

关 键 词：落叶松 复层林 光合特性 净光合速率 

分 类 号：S718.43[农业科学—林学] S791.22