胡举伟　代欣　孙广玉

摘 要：為探索桑树（Morus alba）幼苗生长发育对红蓝组合光的响应机制，采用LEDs为光源，以桑树幼苗为试验材料，5个处理分别以蓝光的百分比表示为：红光（0%蓝光，记为0%B）、蓝光（100%B）和红蓝组合光（15%B、20%B、30%B、50%B），其余的比例为红光，以白光处理为对照，研究不同配比红蓝光对桑树幼苗各项生长参数的影响。结果表明：在桑树种子萌发及幼苗生长阶段以不同红蓝光配比处理，可影响桑树实生幼苗移栽后在自然环境下的生长表现，其中在蓝光（100%B）照下萌发并长成的桑树幼苗，在移栽到自然环境中，通过评价株高、生物量、地径、高径比和茎根比等参数，尤其是质量指数 表明其总体生长状况优于对照、红光（0%B）、红蓝组合光（15%B、20%B、30%B和50%B）.本试验结果表明采用蓝光（100%B）适用于温室繁育桑树实生幼苗。

关键词：桑树;光质;红光;蓝光;生长

中图分类号：S888 文献标识码：A   文章编号：1006-8023（2019）04-0028-04

Effects of Different Proportions of Red and Blue Light Treatments

on Growth of Mulberry Seedlings

HU Juwei1， DAI Xin2， SUN Guangyu2*

（1.Kingenta Ecological Engineering Group Co.， Ltd. State Key Laboratory of Nutrition Resources Integrated Utilization

Key Laboratory of Plant Nutrition and New Fertilizer Creation， Ministry of Agriculture， Linyi 276700;

2.College of Life Science， Northeast Forest University， Harbin 150040）

Abstract：In order to explore the mechanism of response of growth and development of mulberry seedlings to the combination of red and blue light， the LEDs as light sources were used in this study with 6 treatments. The five different spectral treatments were expressed as the blue （B） light percentage： red light （0%B）， blue light （100%B） and combinations of red and blue light （15%B， 20%B， 30%B， 50%B）， the remaining percentage was red. Using white light as control， and the effects of different proportions of red and blue light on the growth and development of mulberry seedlings were studied to provide reference for practical application of red and blue LEDs. The results showed that different proportions of red and blue light treatments were performed in stages of seed germination and seedling growth of mulberry， affecting the growth performance of mulberry seedlings in the natural environment after transplanting. By evaluating the plant height， biomass， root collar diameter， plant height-root collar diameter ratio， shoot-root ratio and other parameters， especially the quality index， the growth performance of mulberry seedlings that germinated and grew under the combination of blue light （100%B） was better than that of seedlings treated with white light， red light （0%B）， the combinations of red and blue light （15%B， 20%B， 30%B and 50%B）. These results indicated that the blue light （100%B）was suitable for the breeding of mulberry seedlings in greenhouse.

Keywords：Mulberry; light quality; red light; blue light; growth

0 引言

近年来发光二极管（LEDs）技术的发展为优化设施农业中的光环境，开辟了新的途径。LEDs是冷光源，可对植物进行近距离照射，具有体积小、节能高效等特点[1]。此外，相对于金属卤化灯等宽光谱的光源，LEDs发射的光只在一个狭窄的波段内，可以有针对性的选择波长[1-2]。因此，LEDs为研究不同光质对植物生理特性的影响提供了较好的方法。

中国北方传统桑树育苗是在大田中进行，桑树种子萌发和幼苗生长易受温度、降水等自然环境变化的影响，近年来在实际生产中也逐渐采用温室繁育桑树幼苗，获得健壮幼苗，以满足大田桑树栽培和桑树扦插育苗的需要。……