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对金叶红瑞木的光合生理特性进行研究,结果表明:(1)金叶红瑞木的光饱和点为1536.66μmol·m-2·s-1,光补偿点为38.44μmol·m-2·s-1,光补偿点较高,光饱和点也高,且表观量子效率较低(0.0314),属于不耐阴的阳性树种;(2)金叶红瑞木在晴朗的夏天,叶片的净光合速率日变化呈双峰曲线型;(3)影响净光合速率最显著的因子是光合有效辐射(PAR)和气温(Ta),其次为叶面水气压亏缺(Vpd L)。(4)影响光能利用率最显著的因子是光合有效辐射和气温,其次为叶面水气压亏缺。金叶红瑞木适合种植于光照充足的环境。夏季为了提高金叶红瑞木的净光合速率和光能利用率应适当增加光合有效辐射和环境温度,但是在炎热干燥的正午期间为缓解“午休”现象应注意降温、保湿,如采取叶面喷雾的措施以降低小环境的温度。
The results showed that: (1) The light saturation point was 1536.66μmol · m-2 · s-1 and the light compensation point was 38.44μmol · m-2 · s -1, higher light compensation point, higher light saturation point, and lower apparent quantum yield (0.0314), which are the positive tree species of impatient shade; (2) In the clear summer, net photosynthesis (3) The most significant factors affecting net photosynthetic rate were PAR and TEM, followed by VpdL. (4) The most significant factors that affect the utilization of light energy are photosynthetically active radiation and temperature, followed by the pressure deficit of foliar water. Golden leaf red Swiss wood suitable for planting in sufficient light environment. Summer In order to improve the net photosynthetic rate and light utilization rate of Golden LEYMO should appropriately increase the photosynthetically active radiation and ambient temperature, but in the noon of hot and dry to alleviate “lunch breaks ” phenomenon should pay attention to cooling, moisturizing, such as the use of foliar Spray measures to reduce the temperature of the small environment.