不同光质光周期对樱桃萝卜生长发育及营养品质的影响

光质和光周期可以调节植物生长过程中肉质根等地下贮藏器官的形成。该试验以‘昆优2号’樱桃萝卜为试验材料,以白光(W)为对照,研究8R2B、5R5B、2R8B红蓝光配比光质(红蓝光比例分别为8∶2、5∶5、2∶8)与8L/16D、12L/12D、16L/8D光周期(光照/黑暗分别为8 h/16 h、12 h/12 h、16 h/8 h)组合对樱桃萝卜生长发育和营养品质的影响,筛选适合樱桃萝卜生长的光质光周期组合。结果表明:长光照(16L/8D)W、8R2B处理对樱桃萝卜叶片生长、肉质根大小、根冠比都有显著的促进作用,长光照W有利于樱桃萝卜更快形成膨大的肉质根;长光照W、8R2B处理下的樱桃萝卜肉质根多酚含量、抗氧化能力差异不大;长光照W利于樱桃萝卜肉质根可溶性糖、可溶性蛋白积累,长光照8R2B有利于肉质根可溶性蛋白积累。研究发现,适当的光质和光周期组合可显著促进樱桃萝卜叶片生长、肉质根膨大以及根中营养物质的积累,从而获得良好的长势和营养品质,并以长光照(16L/8D即光照/黑暗为16 h/8 h)白光组合最佳。

Effect of Different Light Quality and Photoperiods on Growth Development and Nutritional Quality of Cherry Radish

Light quality and photoperiod can regulate the formation of underground storage organs such as fleshy roots during plant growth.In this test,‘Superior Queen No.2’cherry radish was used as the test material,and white light(W)was used as a control to study the red-blue light ratio of 8R2B,5R5B,and 2R8B(the ratio of red and blue light was 8∶2,5∶5,2∶8,respectively)and 8L/16D,12L/12D,16L/8D photoperiod(light/dark was 8 h/16 h,12 h/12 h,16 h/8 h,respectively)on the effects of the growth and quality of cherry radish,which is screening combinations of light and quality photoperiod suitable for cherry radish growth.The test results showed that:long light(16L/8D)W,8R2B treatment significantly promoted cherry radish leaf growth,fleshy root size and root-shoot ratio,and long light W was beneficial to cherry radish to form enlarged fleshy roots faster;The content of polyphenols and antioxidant capacity of cherry radish roots under long light W and 8R2B treatments were not significantly different;long light W was beneficial to the accumulation of soluble sugar and soluble protein in fleshy roots of cherry radish,and long light 8R2B was beneficial to the accumulation of soluble proteins in fleshy roots.The study found that the appropriate combination of light quality and photoperiod can significantly promote cherry radish leaf growth,fleshy root enlargement,and accumulation of nutrients in the root,thereby obtaining good growth and nutritional quality.The combination of long light(16L/8D)and white light was the best.