Abstract:

Taking tomato（Solanum lycopersicum L. ）cultivar‘Liaoyuan Duoli’as text material，this paper selected white light（W），and the other 3 LED light sources：red（R），blue（B）and green（G）to form 6 different combined light R9B1（9∶1，the proportion of the number of lights，the same below），R8B2，R7B3，R9G1，R8B1G1，and R7B2G1；and studied the effects of different LED light sources delayed supplementary lighting on tomato seedling growth in winter and spring solar greenhouse．The result showed that supplementary lighting of LED light source could promote the growth of tomato seedlings by different degrees．Among them，the effect of R7B2G1 was the most significant．Compared with the contrast without supplementary lighting，tomato stem diameter increased by 27.42%，fresh and dry weight of the whole plant increased by 17.84% and 30.91%，respectively and strong seedling index increased by 57.61%．In addition，seedling root system activity，chlorophyll content，net photosynthetic rate，and soluble sugar content of tomato leaves，etc. were all increased significantly．In summary，adding certain proportion of green light on red and blue lights basis could significantly promote the growth of tomato seedlings．

Key words: Red, blue and green LED, Delayed supplementary lighting, Tomato, Seedling culture

摘要：

以番茄品种辽园多丽为试材，选择白光（W）及红光（R）、蓝光（B）、绿光（G）3 种LED 光源组成6 种不同比例组合光R9B1（9∶1，灯的数量比，下同）、R8B2、R7B3、R9G1、R8B1G1、R7B2G1，研究不同LED 光源延时补光对冬春季日光温室番茄幼苗生长的影响。结果表明：补照LED 光源不同程度地促进了番茄幼苗的生长，其中R7B2G1 的效果最为显著，与不补光对照相比，茎粗增加27.42%，全株鲜质量和干质量分别提高17.84%、30.91%，壮苗指数提高57.61%；幼苗根系活力、叶绿素含量与净光合速率、叶片可溶性糖含量等也显著提高。综上，在红蓝光源的基础上增加一定比例的绿光，能显著促进番茄幼苗生长。

关键词: 红蓝绿LED, 延时补光, 番茄, 育苗