中文摘要：

为探讨不同LED橙蓝光质配比对滇重楼光生物学特性的影响,同时为LED光源在滇重楼生产上的应用提供理论依据,以3年生滇重楼种苗为试验材料,采用波长为620 nm的橙光和波长为460 nm的蓝光组成的组合光源,设置了4个光质处理,分别为O：B=2：1、O：B=4：1、O：B=6：1、O：B=8：1,对滇重楼叶片生物学鲜重、光合特性和叶绿素荧光参数进行了研究。结果表明,O：B=4：1处理最利于滇重楼叶片光合色素的合成,其传递光能的效率最高,O：B=8：1处理最低。O：B=4：1处理的滇重楼叶片净光合速率、气孔导度、胞间CO_2浓度、蒸腾速率均为最高,O：B=2：1处理各项荧光指标都最低。O：B=4：1处理Fv/Fm、Fv＇/Fm＇、ΦPSⅡ、q P最高。综合分析滇重楼叶片光合特性和荧光特性,以O：B=4：1对促进滇重楼叶片的光合作用最有利。

英文摘要：

In order to study the effect of different ratios of orange and blue LED light on photobiologicalcharacteristics of Paris polyphylla var. yunannensis, and provide a theoretical basis for the LED light used inthe production of P. polyphylla var. yunannensis, 3-year-old seedlings of P. polyphylla var. yunannensis wereselected as materials. 4 light quality treatments were set by orange 620 nm and blue 460 nm LED light as O：B=2：1, O：B=4：1, O：B=6：1, and O：B=8：1, the influences on biological fresh weight, photosynthetic characteristicsand chlorophyll fluorescence parameters were studied. The results showed that the combination of O：B=4：1 wasmost beneficial to the synthesis of photosynthetic pigments, with the highest efficiency of passing luminousenergy, while the set of O：B=8：1 had the lowest one. The net photosynthetic rate, stomatal conductance,intercellular CO_2 concentration and transpiration rate were the highest under the combination of O：B=4：1, whileO：B=2：1 ranked the lowest. Besides, O：B=4：1 combination also owned the highest parameters in Fv/Fm, Fv＇/Fm＇, ΦPS Ⅱ, q P. As a conclusion, all photosynthesis and fluorescence parameters showed that O：B=4：1combination was most advantageous to photosynthesis of Paris polyphylla var. yunannensis leaves.