不同光质对愈合期黄瓜嫁接苗质量的影响  

Effect of LED light on the quality of cucumber grafted seedlings

作　　者：刘新颖 杨其长 郑胤建 刘高峰 李清明 许亚良 LIU Xinying;YANG Qichang;ZHENG Yinjian;LIU Gaofeng;LI Qingming;XU Yaliang(National Agricultural Science&Technology Center/Institute of Urban Agriculture,Chinese Academy of Agricultural Sciences,Chengdu 610000,Sichuan,China)

机构地区：[1]国家成都农业科技中心·中国农业科学院都市农业研究所,成都610000

出　　处：《中国瓜菜》2023年第6期106-113,共8页China Cucurbits And Vegetables

基　　金：成都农业科技中心地方财政专项资金项目(NASC2020AR10,NASC2020KR01);中国农业科学院科技创新工程项目(34-IUA-0334-IUA-01)。

摘　　要：为筛选黄瓜嫁接苗愈合期间的适宜光质条件,利用LED光源调制不同光质比例,以白光(W)为对照,探究了嫁接愈合期间红光(R)、蓝光(B)和红蓝混合光(RB,红光光照度∶蓝光光照度=7∶3)对黄瓜嫁接苗生长及生理生化特性的影响。结果表明,B处理可显著促进茎秆及叶柄伸长,叶片伸展,增加嫁接苗全株鲜质量、干质量及可溶性蛋白含量;RB处理有利于嫁接苗单位叶面积的叶片干质量(LMA)及迪克森质量指数(DQI)等幼苗质量评估指标的提高;W及RB处理下嫁接苗总叶绿素含量与R、B处理相比显著提高,可溶性糖含量显著降低。此外,黄瓜第1朵雌花开放节位以及10、15、20节以内雌花数也受到不同光质处理的影响。RB处理下第1朵雌花开放节位最低,R处理不利于黄瓜嫁接苗雌花的分化。综合来看,红蓝混合光最利于嫁接苗壮苗的培育,提升后期高产潜力,宜作为嫁接苗愈合光质。In order to screen out the suitable light quality conditions during the healing of cucumber grafted seedlings,three treatments were designed with red light(R),blue light(B),and the complex light of red and blue(RB,Red light intensity∶Blue light intensity=7∶3),compared to the treatment of white light(W).B treatment could significantly promote stem and petiole elongation,leaf extension,and increase fresh weight,dry weight and soluble protein accumulation of grafted seedlings.In addition,there were higher leaf mass per area(LMA)and Dickson’s quality index under RB treatment than under other treatments.The total chlorophyll content of grafting seedlings in combination light treatment(W,RB)was significantly higher than monochrome light treatment(R,B).The highest accumulation of soluble sugar was observed in R and B treatment and B-exposed seedlings showed the highest soluble protein content.Furthermore,light quality affected the first female flower of cucumber grafting seedlings and the number of female flowers within 10,15,and 20.Among them,the first female flower was the lowest in the RB treatment,and the number of female flowers was the lest in the R treatment.In conclusion,the RB treatment can enhance the production of high-quality grafted cucumber seedlings.

关 键 词：黄瓜 嫁接苗 LED光源 幼苗质量 

分 类 号：S642.2[农业科学—蔬菜学]