不同光谱LEDs对辣木幼苗生长及叶绿素含量的影响

摘要

[Objective] To study effects of different light emitting diode (LED) light-supplement on seedlings growth and chlorophyll content in leaves of M.oleifera Lam.[Method] With the provenance of India Moringa seeds (M.oleifera PKM-1)as raw materials,different spectral conditions LEDs was used to supply light with 12 h/d (8∶00-20∶00) for it under the same external environment,and seedling growth and chlorophyll content were measured in leaves of M.oleifera Lam under different light-supplement treatment.[Result]M.oleifera Lam seeds germination rate by 4R1B LED treatment was higher than the control(CK),survival rate of three groups M.oleifera Lam seedlings after LEDs light-supplement were higher than CK.Plant height, stem diameter, dry weight of whole plant, dry weight of stem and leaf, total chlorophyll content of M.oleifera Lam seedlings treated by LEDs light-supplement were better than CK.Among of them , the growth promoting effect was the most significant of it treated by all red LEDs,plant height increased by 120.66%,stem diameter increased by 52.11%,whole plant dry weight increased by 52.35%,dry weight of stem and leaf increased by 33.57%,total chlorophyll content increased by 19.28%.[Conclusion] LEDs light-supplement treatment can significantly promote the synthesis of chlorophyll and leaf growth of M.oleifera Lam seedlings.%[目的]研究LED补光对辣木幼苗生长及叶片中叶绿素含量的影响.[方法]以印度改良辣木(Moringa oleifera PKM-1)为试验材料,在相同外界环境下采用不同光谱条件的LEDs(Light Emitting Diodes)光源对辣木垂直补光,每组辣木补光12 h/d(8∶00-20∶00),测定不同补光处理下辣木幼苗的生长情况及其叶片中叶绿素含量.[结果]经红蓝4∶1(4R1B)LEDs处理的辣木种子发芽率高于对照,经过LEDs补光的3组辣木幼苗存活率均高于对照.LEDs补光处理的辣木幼苗株高、茎粗、全株干重、茎叶干重、总叶绿素含量均优于对照.其中光谱条件为全红的LEDs对辣木幼苗生长的促进效果最为显著,株高增加了120.66%,茎粗增加了52.11%,全株干重增加了52.35%,茎叶干重增加了33.57%,叶绿素总含量增加了19.28%.[结论]LED灯补光处理能显著促进辣木幼苗的生长及其叶片中叶绿素的合成.