辽西北沙地常见针叶树光合特征比较

Comparison of Photosynthetic Characteristics of Common Conifers in Sandy Land of Northwestern Liaoning Province

本文研究分析了当地5种常见针叶树在辽宁省西北部沙地的光合特征,结果表明:在光合速率方面,最低的是长白松,最高的是彰武松,并且5种针叶树均呈现出双峰曲线的变化规律;5种针叶树的光合能力在0~2000μmol·m-2·s-1范围内,由强到弱分别为彰武松、油松、樟子松、赤松、长白松;光补偿点较高的为樟子松和赤松,暗呼吸速率最大的为樟子松。

Taking the sandy land of northwestern Liaoning Province as an example,the photosynthetic characteristics of five common conifers in the area were analyzed.Result shows that in terms of photosynthetic rate,the lowest is Pinus syluestriformis,and the highest is Pinus densiflora Sieb.et Zucc.var.zhangwuensis Zhang,Li et Yuan var.nov.,and the five conifers all show a double peak curve.The photosynthetic capacity of the five conifers is in the range of 0-2000μmol·m-2·s-1,from strong to weak,they are Pinus densiflora Sieb.et Zucc.var.zhangwuensis Zhang,Li et Yuan var.nov.,Pinus tabuliformis,Pinus sylvestris var.mongolica Litv.,Pinus densiflora Sieb.et Zucc.,and Pinus syluestriformis;Pinus sylvestris var.mongolica and Pinus densiflora Sieb.et Zucc.have higher light compensation point,Pinus sylvestris var.mongolica have the highest dark respiration rate.