发光二极管(LED)红蓝光照对不同水稻品种秧苗素质的影响

Effects of Red and Blue Illumination from Light-emitting Diode(LED)on Seedling Quality of Different Rice Cultivars

为探讨水稻育秧的光需求规律,促进水稻工厂化育秧的开展,以合丰和黄秀2个水稻品种为材料,研究了发光二极管(LED)红蓝单色光照对水稻秧苗素质的影响。结果表明,LED红蓝单色光长时间照射水稻秧苗,会影响秧苗的正常生长,导致秧苗素质较对照(普通荧光灯)下降。与红光处理相比,蓝光处理的水稻秧苗的光合色素含量下降较快,但使体内叶绿素a和类胡萝卜素含量维持在较高水平。蓝光处理抑制水稻秧苗的伸长生长,根长、株高都低于红光处理,却可以增加秧苗根数、茎粗,增加干物质积累,使壮苗指数等秧苗素质指标优于红光处理。这说明红蓝单色LED光源不能作为独立光源用于水稻工厂化育秧。

In order to probe the illumination-requirement law of raising rice seedlings and promote the factory production of raising rice seedlings,two rice cultivars（Hefeng and Huangxiu）were used to study the effect of red and blue illumination from light emitting diode（LED）on the quality of seedlings.The results showed that seedlings growth was affected by LED red or blue illumination treatment,leading to the decreased quality of seedlings compared with CK（conventional fluorescent light）.Total content of photosynthetic pigments decreased more under long-time LED blue illumination than under LED red illumination,while the contents of chlorophyll a and carotenoid maintained a higher level in treatment of LED red illumination.Further study showed that blue illumination treatment inhibited the root elongation,root length and plant height of rice seedlings,but increased the root number,stem thickness and dry matter accumulation,so the sound seedling index was superior to that of red illumination treatment.It implied that LED monochrome blue or red illumination would not meet the illumination requirement in factory production of raising rice seedlings.