丰林国家级自然保护区不同海拔红松光合特性分析
Analysis of Physiological Characteristics of Pinus koraiensis at Different Elevations in Fenglin National Nature Reserve

为了揭示不同海拔对红松光合作用的影响规律，在黑龙江省丰林国家级自然保护区内，选择不同海拔样地(低海拔、高海拔)，采用光合分析仪(li-6400)进行光合基本参数和光响应曲线(6~9月)测定。结果表明: 6~9月份生长季内，高海拔样地红松净光合速率、最大净光合速率均高于低海拔样地，差异不显著；光补偿点和光饱和点随着海拔的高度的增加而升高；在AQY无明显变化情况下，除6月份外，高海拔红松Rd均低于低海拔红松。海拔高度的变化对红松光合特性有明显的影响。高海拔红松的光合能力优于低海拔红松。
In order to reveal the effects of different elevations on photosynthesis of Pinus koraiensis, we selected samples at different elevations (low elevation and high elevation) in Fenglin National Nature Reserve of Heilongjiang Province, and used a photosynthesis analyzer (LI-6400) to measure the basic photosynthetic parameters and light response curves (from June to September). The results showed that during the growing season from June to September, the net photosynthetic rate and the maximum net photosynthetic rate of Pinus koraiensis at high altitude were higher than those at low altitude, and the differences were not significant. The light compensation point and light saturation point increased with the increase of altitude. In the case of no significant change in AQY, RD of Pinus koraiensis at high elevation was lower than that at low elevation except in June. The change of altitude had obvious effect on the photosynthetic characteristics of Pinus koraiensis. The photosynthetic capacity of Pinus koraiensis at high elevation is better than that at low elevation.