摘要
采用发光二极管LED(Light Emitting Diode)为光源,设置不同光质(正白光、蓝光、红光)和光周期(8、12、16 h)处理,对2年生多穗柯(Lithocarpus polystachyus)扦插苗进行试验。结果表明:处理2个月后,多穗柯幼苗叶面积、叶长、叶宽、叶片数、苗高增量及地径增量差异显著(P<0.05),说明不同光质和光周期处理对其叶片特征及幼苗生长有影响作用。与正白光相比,蓝光有利于多穗柯幼苗的苗高增长,幼苗叶片数量增多,最大净光合速度达到8.59μmol/(m^2·s),而红光则有利于促进幼苗的地径增长量;对比正白光,长日照处理的叶片数及苗高增长量显著提高,有效光强在400μmol/(m^2·s)之后光合速率均高于对照,而短日照处理叶片数显著减少,有效光强在400μmol/(m^2·s)之后光合速率均低于对照。
Experiments were conducted on 2-year-old cutting seedlings ofLithocarpus polystachyus with dif?ferent light qualities and photoperiods by the LED lighting system.Results showed that there were significant differences in leaf area,leaf length,leaf width,leaf number,seedling height increment and ground diameter increment(P<0.05),which indicated that different light qualities and photoperiods had effect on the leaf characteristics and seedling growth.Compared with the white light,blue light was beneficial to the growth of Lithocarpus polystachyus seedlings and the increase of leaf number,and the maximum net photosynthesis rate increased to 8.59μmol/(m2·s).Red light was beneficial to promote the growth of the ground diameter.After long-day treatment,the number of leaves and height increased significantly and the photosynthesis rate was higher than that of control group,while the effective light intensity exceeded 400μmol/(m2·s).On the other hand,after the short-day treatment,the number of leaves decreased significantly and the photosynthetic rate was lower than that of control group,while the effective light intensity exceeded 400μmol/(m2·s).
作者
蓝金宣
黄晓露
李开祥
李宝财
陈金艳
王坤
梁文汇
LAN Jin-xuan;HUANG Xiao-lu;LI Kai-xiang;LI Bao-cai;CHEN Jin-yan;WANG Kun;LIANG Wen-hui(Guangxi Forestry Research Institute,Guangxi Key Laboratory of Special Non-wood Forest Cultivation&Utilization,Nanning 530002,China)
出处
《广西林业科学》
2018年第1期24-28,共5页
Guangxi Forestry Science
基金
广西自然科学基金项目(桂财教[2015]第139号)
广西林业科技项目(桂林科字[2014]第28号)
广西科学研究与技术开发计划项目(桂科攻1598006-5-6)
广西林科院基本科研业务费专项(林科201402号)
关键词
多穗柯
光质
光周期
叶片特征
Lithocarpus polystachyus
light quality
photoperiod
leaf characteristics
