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.