补充不同光质对温室黄瓜生长发育、光合和前期产量的影响

 【目的】研究温室黄瓜对不同光质的反应及其反应机理。【方法】对处于弱光条件下的温室黄瓜进行补充红光（650 nm）和蓝光（450 nm）处理，以补充白光为对照，补光时间10 h（7：30－17：30），测定不同光质对温室黄瓜生长发育、叶绿素含量、叶片光合特性和前期产量的影响。【结果】补充红光处理提高了温室黄瓜冠层日最高温度、日最低温度、株高、叶面积、叶绿素含量、叶片光合速率、干物质产量，促进同化产物向营养器官分配。蓝光处理提高了温室黄瓜叶片的比叶面积、气孔导度，促进同化产物向果实分配，提高了商品果数量和商品果总产量。【结论】补充红光和蓝光由于提高了温室黄瓜叶片的光合速率、叶面积和比叶面积，从而增加了温室黄瓜的干物质产量，补充蓝光促进了同化产物向果实分配，从而提高了产量。

Effects of Supplemental Different Light Qualities on Growth,Photosynthesis,Biomass Partition and Early Yield of Greenhouse Cucumber

【Objective】 The purpose is to explore the responses and their mechanisms of cucumber plant to different light qualities in greenhouse. 【Method】 Cucumber (Cucumis sativus L. cv. Delstar) was planted in greenhouse with 10 h (7：30-17：30) of supplemental different light qualities such as red light (650 nm) and blue light (450 nm), and white light as control. The effects of supplemental different light qualities on plant growth, photosynthesis, biomass partition, early fruit yield were investigated. 【Result】Maximum and minimum temperature under supplemental red lighting was higher than those of supplemental white and blue lighting. The specific leaf area of red and white treatments was lower than that of plants grown under supplemental blue treatment. The chlorophyll content and dry matter production of white treatment was lower than that of red and blue treatments. Red treatment were higher and had more leaves and larger leaf area than that those of plant grown under white and blue treatment. The root, stem and leaf-partitioning index of red treatment were higher than those of blue and white treatments. Leaf photosynthesis rate and Fv/Fm of red treatment were higher than those of white and blue treatments. Fo and maximal ETR under white treatment were higher than those of red and blue treatments. The leaf stomatal conductance, Fo, and fruit-partitioning index under blue treatment were higher than those of white and red treatment. 【Conclusion】 The dry matter production under supplemental red and blue light increased because the photosynthesis rate, leaf area and specific leaf area increased. Greenhouse cucumber under supplemental blue light got highest marketable production per plant because supplemental blue light can promote more assimilation partitioning to fruit.