中国农业气象

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LED光源不同R/B处理对甘薯组培苗品质及节能效果的影响

杨雅婷;程瑞峰;杨其长;肖平;   

  1. 中国农业科学院农业环境与可持续发展研究所/农业部农业环境与气候变化重点开放实验室;
  • 出版日期:2010-08-10 发布日期:2010-08-10
  • 基金资助:
    中央级公益性科研院所基本科研业务费专项(0032009014)

Effects of LED Light Quality R/B Ratio to Quality of Sweet Potato Plantlets in Vitro and Energy Saving

YANG Ya-ting,CHENG Rui-feng,YANG Qi-chang,XIAO Ping(Institute of Environment and Sustainable Development in Agriculture,CAAS/Key Laboratory for Agro-environment and Climate Change,Ministry of Agriculture,Beijing 100081,China)   

  • Online:2010-08-10 Published:2010-08-10

摘要: 采用红色LED(660±20nm)和蓝色LED(450±20nm)组合制成的LED灯管作为组培人工光源,研究光照度为35μmol.m-2.s-1时,红蓝光质比(R/B)分别为4、6、8、10的光环境培养条件下甘薯组培苗的生长情况,以相同光照度的荧光灯为对照,培育甘薯组培苗28d。结果表明:660nm红光和450nm蓝光组合可以有效抑制植物徒长,有降低地上部分含水率和提高根冠比的作用,荧光灯下生长的植株地上鲜重、叶片含水率和株高均最大,但是植株徒长,干物质积累不良。高的R/B处理能提高植株高度和根冠比,增大地下鲜重,降低地上含水率,有利于干物质积累;R/B为8时甘薯组培苗的地下鲜重和根冠比均最大;R/B变化对叶片光合色素含量没有显著影响。另外,LED光源的电能消耗与R/B值呈线性增加关系,并比荧光灯节能27.6%~48.0%。

关键词: LED, 组培, R/B处理, 甘薯, 能耗

Abstract: A LED(Light Emitting Diode) lighting tube for tissue culture was developed by using red LEDs(660±20nm) and blue LEDs(450±20nm).The ratio of red light intensity to blue light intensity(R/B ratio) was set at 4,6,8 and 10 respectively with a total PPF(Photosynthetic Photon Flux) of 35 mol·m-2·s-1.The sweet potato plantlets in vitro grown 28 days under four different R/B ratios and the normal fluorescent lamp were used as a control.Effect of the R/B ratio on the growth of sweet potato plantlets in vitro and the energy consumption with different R/B ratios were investigated.The results showed that the combination of red light and blue light could inhibit excessive growth,reduce plant water content and improve the root-shoot ratio.The fresh weight of above ground,leaf water content and height of plantlet were highest under fluorescent lamp conditions,but they also showed excessive growth and low dry matter accumulation.The stem length,root-shoot ratio,fresh weight of shoot and shoot water content were improved by the high R/B treatment.The root fresh weight and the root-top ratio were highest in the R/B treatment at 8.The R/B treatments had not significant influence on the chlorophyll and carotenoid contents.The energy consumption of LED tubes had a linear relationship with the R/B ratios and reduced by 27.6%~48.0% compared to the fluorescent lamp.

Key words: LED, LED, Tissue culture, R/B treatment, Sweet potato, Energy consumption