【摘 要】
：
以红色LED(660±20nm)和蓝色LED(450±20nm)组合制成的LED灯管作为组培人工光源,研究光照度为35μmol·m-2·s-1时,红蓝光质比(R/B)分别为4、6、8、10的光环境培养条件下甘薯组培苗的生长情况,以相同光照度的荧光灯为对照,培育甘薯组培苗28d.结果表明:660nm红光和450nm蓝光组合可有效抑制植物徒长、降低地上部分含水率和提高根冠比;荧光灯下生长的植株地上鲜重
【机 构】
：
农业部南京农业机械化研究所农业资源与设施工程技术中心,南京210014 中国农业科学院农业环境与可
【出 处】
：
2011第二届中国·寿光国际设施园艺高层学术论坛
论文部分内容阅读
以红色LED(660±20nm)和蓝色LED(450±20nm)组合制成的LED灯管作为组培人工光源,研究光照度为35μmol·m-2·s-1时,红蓝光质比(R/B)分别为4、6、8、10的光环境培养条件下甘薯组培苗的生长情况,以相同光照度的荧光灯为对照,培育甘薯组培苗28d.结果表明:660nm红光和450nm蓝光组合可有效抑制植物徒长、降低地上部分含水率和提高根冠比;荧光灯下生长的植株地上鲜重、叶片含水率和株高均最大,但是植株徒长,干物质积累不良.高的R/B处理能提高植株高度和根冠比,增大地下鲜重,降低地上含水率,有利于干物质积累;R/B为8时甘薯组培苗的地下鲜重和根冠比均最大.另外,LED光源的电能消耗与R/B值呈线性关系,并比荧光灯节能27.6％～48.0％.
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