中文摘要：

采用新型半导体光源精确调制光质（红光、黄光、绿光、红蓝组合光和蓝光）,对大棚内的黄瓜‘中农21’和‘中农27’,辣椒‘巨无霸5号’和‘镇研六号’,番茄‘荷兰红粉’和‘以色列虹丰’进行定时补光。研究结果表明,不同光质补光对3种蔬菜共6个品种幼苗生长影响显著且存在差异。总体认为,补充红光和红蓝光使幼苗茎粗、鲜样质量和干样质量以及壮苗指数均显著高于对照（无补光处理）,黄瓜‘中农21’、番茄和辣椒的可溶性糖含量也显著提高。在蓝光处理下,辣椒‘巨无霸5号’壮苗指数和干样质量均达到最大且显著高于对照。红光或黄光显著提高黄瓜、番茄‘以色列虹丰’的叶绿素和类胡萝卜素含量。

英文摘要：

Effects of supplemental lighting with different light qualities on the growth and physiological characteristics of seedlings of cucumber ＇ Zhongnong 21 ＇ and ＇ Zhongnong 27 ＇ , pepper ＇ Juwuba 5 ＇ and ＇Zhenyan 6＇, tomato ＇Holland Hongfen＇ and ＇Israel Hongfeng＇ were studied. The light emitting diode （LED） with different light qualities （red light, yellow light, green light, red ＋ blue light and blue light） were used as supplemental lighting. The experimental results showed that the effects of supplemental lighting with different light qualities on_different vegetable seedlings were obvious, but not identical. Generally speaking, the growth of seedlings were remarkably effected by red LED and red ＋ blue LED, the stern diameter, fresh/dry weight and healthy index of the seedlings were significantly higher than those of the control （ no supplemental lighting）, and the soluble sugar content of cucumber ＇ Zhongnong 21 ＇ , tomato and pepper seedlings were significantly increased as well. The maximal healthy index and dry weight of pepper ＇ Juwu ba 5＇ were obtained with blue LED. Chlorophyll and carotenoid content of cucumber and tomato ＇ Israel Hongfeng＇ seedlings were significantly increased by red or yellow LED. The results suggested that supplementing red or red ＋ blue light could accelerate the growth of the vegetable seedlings and benefit the breeding of healthy seedling, but appropriate readjustment is necessary according to the different vegetable species and cuhivars.