暗期补光对黄瓜幼苗形态调节效果及综合评价  

Effect of dark period lighting regulation on cucumber seedling morphology and comprehensive evaluation analysis and comprehensive evaluation

作　　者：申宝营[1] 李毅念[1] 赵三琴[1] 丁为民[1] 惠娜[1] 李洁[1] 

机构地区：[1]南京农业大学工学院/江苏省现代设施农业技术与装备工程实验室,南京210031

出　　处：《农业工程学报》2014年第22期201-208,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家高技术发展计划(863计划)(2012AA101904);江苏省2012年度普通高校研究生科研创新计划项目(CXZZ12-0272)

摘　　要：为确定暗期延时补光调节黄瓜幼苗形态的最优光质和补光时长,采用L1(70%R,30%B)、L2(80%R,20%B)、L3(90%R,10%B)L4(100%R)4种发光二极管(light emitting diodes,LED)光源对"津春四号"黄瓜幼苗进行2 h(19:00-21:00)、4 h(19:00-23:00)和6 h(19:00-01:00)时长的暗期延时补光,以无暗期补光为对照,研究暗期延时补光对黄瓜幼苗形态的调节,并利用综合评价法分析暗期延时补光对幼苗形态的影响。结果表明,暗期延时补光时长和补光光质对黄瓜幼苗下胚轴长、苗高和茎粗的交互影响极显著,对幼苗壮苗指数的交互影响显著;L2光质补光4 h幼苗综合评价值最大;L4光质补光可促进前期(一叶期和二叶期)幼苗叶面积和茎粗的增加,L2光质补光可促进后期(成苗期)幼苗叶面积和茎粗的增加,该研究结果为暗期补光培育黄瓜幼苗以及开发光形态调控补光装置提供依据。To ascertain light quality and light duration at dark duration and its influence on the growth and morphological of cucumber seedling, light-emitting diodes lights were taken as supplemental light at dark period for cucumber （Cucumis sativus L. cv. Cumlaude） seedlings to study in this paper. According to the influence confirmed by using comprehensive evaluate method, suitable light quality and light duration were selected. Cucumber“Jin ChunⅣ”seedlings were planted in greenhouse with or without supplemental light during dark period for two groups of experiments. In the first group of experiments, the treatments were 4 types LED light, L1 （70%R, 30%B）, L2 （80%R, 20%B）, L3 （90%R, 10%B）, L4 （100%R） , which supplementing light times were 2 h （19：00-21：00）, 4 h （19：00-23：00） and 6 h （19：00-01：00） respectively during dark period, and no supplemental light in dark period were taken as control （CK）. And in the second group of experiment, the treatments were two types LED light, L2 and L4, which supplementing light times during dark period for 4h, and no light in dark period was taken as control （CK）. Both in the two groups of experiment, these indexes including hypocotyls length, cotyledon area, stem diameter, leaf area, seedling height, dry weight, chlorophyll content, seedling index and root shoot ratio of cucumber seedlings were investigated and were used to comprehensive evaluate and analyze the effect of light quality and light duration on the growth of cucumber seedlings. The results showed that, light quality affected hypocotyls length and stem diameter significantly at 0.05 level, and affects seedling height, leaf area, chlorophyll, dry weight and seedling index significantly at 0.01 level. Light duration had significant effect on seedling index at 0.05 level and significant effect on hypocotyls length, seedling height and dry weight at 0.01 level. Light quality and light duration had significantly interaction effects on hypocotyls length, seedling height a

关 键 词：发光二极管 叶绿素 光 延时补光 黄瓜 熵值法 壮苗指数 

分 类 号：S625.51[农业科学—园艺学] S642.2