LED连续光和不同频率间歇光对黄瓜幼苗生长及光合特性的影响  

Effect of Continuous Light and Intermittent Light With Different Frequencies of LED on the Growth and Photosynthesis of Cucumber Seedlings

作　　者：王达菲[1] 杨振超[1,2] 蔡华[1] 王晓旭[1] 何蔚[1] 

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100 [2]农业部西北设施园艺工程重点实验室,陕西杨凌712100

出　　处：《北方园艺》2016年第19期55-59,共5页Northern Horticulture

基　　金：国家"863"计划资助项目(2013AA103004)

摘　　要：以"津优1号"黄瓜为试材,采用单因素方差分析方法,研究了LED光源不同发光频率对植物幼苗生长发育和光合的影响,以期获得最适宜黄瓜幼苗生长的频率和占空比组合,实现节约能源和优质高产的目标。试验设置连续光(CK)和发光频率分别是0.1 Hz(T1)、100Hz(T2)、100 000Hz(T3)的间歇光共4个处理作为黄瓜生长光源,每个处理3次重复。结果表明:频率越低,黄瓜幼苗的株高和茎叶鲜质量均显著大于对照;频率越高,黄瓜幼苗的茎粗、叶面积、叶绿素含量、暗适应下PSII的最大量子产量均显著大于对照。不同频率的间歇光在一定程度上对黄瓜幼苗的生长和光合作用起促进作用。较低频率的间歇光可能有助于增加黄瓜幼苗干物质的积累量、植株生长率和增强植株的健壮程度;较高频率的间歇光可能有助于黄瓜幼苗的植株形态向有利于光合作用的方向发展。＇Jinyou No. 1＇ cucumber was used as test materials and one way ANOVA was used,the effects of continuous light and intermittent light with different frequencies of LED on the growth and photosynthesis of cucumber seedlings for the purpose of getting the best combination of frequency and duty ratio for the growth of cucumber seedlings, saving energy and having good quality and high yield were studied. The control group was continuous LED light（CK） and the treatment groups were intermittent light with frequencies of 0. 1 Hz（T1）,100 Hz（T2）,100 000 Hz（T3）. Each treatment had three replications. The results indicated that with the decrease of frequencies of LED,the plant height ,fresh stalk and leaf mass of cucumber seedlings increased, which were significantly higher than the control group. With the increase of frequencies of LED, the stem diameter,leaf area, maximum quantum yield of PSII under dark adaptation increased, which were significantly higher than that of control group. Thus it could come to conclusions that different frequencies had positive effects on the growth, photosynthesis and fluorescence of cucumber seedlings. Intermittent light with low frequencies might be good for the increase of accumulation of dry matter, growth rate and fitness. That with high frequencies might be good for making plant morphology of cucumber seedlings better for photosynthesis.

关 键 词：黄瓜 LED 间歇光 频率 

分 类 号：S642.204.3[农业科学—蔬菜学]