马桂芹等

摘要：以金乡4号大蒜青蒜苗为试材，采用发光二极管（LED）精量调制光源，以白光为对照，研究红、蓝、黄、红/蓝/黄（7/2/1）、红/蓝（7/2）5种不同光质对青蒜苗生长及品质的影响。结果表明：黄光有利于干物质积累及地上部生长，红光有利于色素形成，蓝光抑制干物质积累与色素形成；红光有利于碳水化合物形成，黄光及蓝光有利于含氮化合物形成。

关键词：LED光源；青蒜苗；光质；生长；品质

中图分类号：S633.425.5+2文献标识号：A文章编号：1001-4942（2015）05-0031-03

Effect of Different LED Light Sources

on Growth and Nutritional Quality of Garlic Seedlings

Ma Guiqin1， Liu Shiqi1*， Liu Yingying2， Qian Shengyan1， Chen Yafei1， Liu Xingchen1

（ 1.College of Horticulture Science and Engineering， Shandong Agricultural University/ State Key Laboratory of Crop Biology，

Taian 271018， China；2.Information Research Institute， Shandong Academy of Agricultural Sciences， Jinan 250100，China ）

AbstractTaking garlic cultivar Jinxiang 4 as material， the effects of different LED light sources， including red light， blue light， yellow light， red+blue+yellow（7∶2∶1）， red+blue（7∶2）， and white light （as control） on the growth and nutrition quality of garlic seedlings were studied. The results showed that the dry mass accumulation and growth of the above ground part were improved by yellow light but inhibited by blue light. The formation of pigments was promoted by red light but inhibited by blue light.The formation of carbohydrates was improved by red light， and that of nitrogen compounds was improved by yellow light and blue light.

Key wordsLED light sources； Garlic seedlings； Light quality； Growth；Nutritional quality

光质是植物生长发育的重要影响因素之一。关于不同光质对植物影响的研究，多以有色塑料膜、滤光膜或有色荧光灯为主，其缺点为光质不纯、光谱不集中、杂质光多，试验结果的可靠性不高，亟需改善。LED（Light emitting diode）精量调制光源具有体积小、重量轻、固态、寿命长、驱动电压低、光效率高、能耗小、安全、可靠耐用、不易色衰等优点，波谱范围较窄，波长正好与植物光合成和光形态建成的光谱范围相吻合。因此，LED光源日益受到人们的关注，并逐渐应用于植物组织培养、设施园艺与工厂化育苗及航天受控生态生保系统等可控设施环境的植物栽培中。

青蒜苗是常见的大蒜食用部位，不仅营养丰富，而且繁殖速度快，土地利用率高，为最受欢迎的蔬菜之一。近年来，LED光源对植物生长影响的研究已有报道，但对青蒜苗的研究较少。本试验以金乡4号大蒜青蒜苗为试材，采用发光二极管（LED）精量调制光源，以白光为对照，研究红、蓝、黄、红/蓝/黄（7/2/1）、红/蓝（7/2）5种不同光质对青蒜苗生长及品质的影响，旨在为LED光源在青蒜苗设施栽培上的应用提供科学依据。……