《植物生理学报》 2015, 51(8): 1273-1279

不同红蓝配比的LED光调控黄瓜幼苗的生长

徐文栋, 刘晓英, 焦学磊, 徐志刚^*

南京农业大学农学院, 南京210095

通信作者：徐志刚；E-mail: xuzhigang@njau.edu.cn；Tel: 13951879589

摘　要：

红光和蓝光是植物吸收的最主要光谱, 不同作物对红光和蓝光光谱的需求有差异。本研究采用LED调制红蓝光的不同配比, 研究了不同红蓝配比的LED光对黄瓜幼苗生长的影响, 以期为设施黄瓜育苗光调控提供理论依据和数据支撑。结果显示: 除红光比例为25%的R25处理外, 其他处理的株高随着红光比例的减小而增大; 在红光比例为75%的R75处理中, 植株茎粗最大、叶绿素含量最高; 100%蓝光处理的叶面积最大; 随着红光比例的下降, 植株干鲜重呈现先增后减的趋势, 红光比例为75%的R75处理的植株鲜重和干重最大且壮苗指数显著大于其他处理; 可溶性糖含量随蓝光比例的上升而下降。结果表明: 不同红蓝比的LED光对黄瓜幼苗的生长调控是红光和蓝光相抑或互扬的叠加作用效果。R75处理的植株生长健壮, 生物量积累较多, 红蓝比为3:1的LED复合光可以作为设施培育黄瓜幼苗的适宜光谱。

关键词：红蓝光配比; 黄瓜幼苗; 生长; 光合速率; 可溶性蛋白

收稿：2015-04-23   修定：2015-06-17

资助：国家高技术研究发展计划(“863”计划) (2013AA103003)和农业部公益行业(农业)科研专项(201303108)。

Different Ratio of Red and Blue LED Regulation Growth and Development of Cucumber Seedlings

XU Wen-Dong, LIU Xiao-Ying, JIAO Xue-Lei, XU Zhi-Gang^*

Agriculture College of Nanjing Agricultural University, Nanjing 210095, China

Corresponding author: XU Zhi-Gang; E-mail: xuzhigang@njau.edu.cn; Tel: 13951879589

Abstract:

Red and blue light are the most important spectrum absorbed by plants. The demands quantitative of different crops for red or blue light are different. In this study, we adopted red and blue LED, the effects of different ratio of red and blue LED on growth of cucumber seedling were investigated to provide a theoretical basis and data support for cucumber seedlings to light regulation. The results showed that the ratio of red and blue LED regulated growth and development of cucumber seedlings. Except the treatment of 25% red light of R25, with decreasing of red light, the plant height increased. Stem diameter of 75% red light of R75 treatment was the thickest and chlorophyll content was the most. Leaf area of 100% blue light of R0 treatment was the largest. With the decrease of red light, fresh and dry weight of plant first increased then decreased, plant fresh weight, dry weight and healthy index of R75 treatment were significantly greater than those of other treatments. With blue light increased, soluble sugar content decreased. The results suggested that red and blue composited LED light regulation cucumber seedlings growth was promoted and prohibited effects of red and blue light. Under 75% red light of R75, cucumber seedlings is healthier and stronger, and accumulated more biomass. The ratio 3:1 of red and blue composited light can be used reference standard of spectrum modulation for culturing cucumber seedlings in facilities.

Key words: ratio of red and blue light; cucumber seedlings; growth; photosynthetic rate; soluble protein