蕹菜芽苗菜对LED 光强和光质的生长响应

以阔叶空心菜为试材，研究蕹菜芽苗菜对LED 光强和光质的生长响应。结果表明：绿化阶段结束时处理L₇₀₀₀RBW4∶1∶1（光强7 000 lx，红光∶蓝光∶白光为4∶1∶1）的脱壳率显著高于其他处理；光强为7 000 lx 时，3 种光质处理的蕹菜芽苗菜可食部分干质量均显著高于白光对照；光照强度过高显著影响叶绿素的累积，高光强（L₁₁₀₀₀）下的叶绿素a、叶绿素b 含量及叶绿素总量随红光比例的增加而降低，同时子叶白化现象越发明显；不同光强条件下，3 种光质处理的抗坏 血酸含量均随着红光比例的增加而降低，而可溶性糖含量处理间差异不显著；主成分分析结果表明，L₇₀₀₀RBW4∶1∶1 在本试验条件下表现最佳，是较适宜蕹菜芽苗菜工厂化生产的LED 光源配方。

Growth Response of Water Spinach Sprouts to LED Light Intensity and Light Quality

Abstract：Taking the seeds of‘Kuoyekongxincai’as test material，this paper studied the growth response of water spinach sprouts to LED light intensity and light quality．The results showed that the shelling rate of L₇₀₀₀RBW4∶1∶1（light intensity 7 000 lx，red light∶blue light∶white light=4∶1∶1） was significantly higher than that of the other treatments at the end of greening stage．When light intensity was 7 000 lx，the dry weight of edible part treated with 3 light qualities was significantly higher than that of white light control．Overillumination would remarkably affect chlorophyll accumulation．Under high light intensity（L₁₁₀₀₀），the content of chlorophyll a，chlorophyll b and total chlorophyll decreased with the increase of red light ratio，and the albinism of cotyledons became more obvious．Under different light intensity，the ascorbic acid content of the 3 light quality treatments decreased with the increase of red light ratio，but there was no significant difference in soluble sugar content among the 3 light quality treatments．The results of principal component analysis showed that L₇₀₀₀RBW4∶1∶1 had the best performance under the experimental conditions，and it was a suitable LED light source formulation for industrialized production of water spinach sprouts．