Abstract：Abstract：Light emitting diode（LED）was applied to accurately modulate light intensity．
The effects of light intensity on growth and nutritional quality of black soybean（Glycine max）
sprouts were studied．The results indicated that compared with cultivation in darkness，the
hypocotyl diameter was significantly increased when the light intensity were 3 μmol·m-2·s-1，9
μmol·m-2·s-1 and 15 μmol·m-2·s-1．The content of VC was significantly increased when the
light intensity was 3 μmol·m-2·s-1．The contents of soluble protein，soluble sugar，sucrose and
the activity of POD were significantly increased when the light intensity was 9 μmol·m-2·s-1．
Under the light intensity of 3-15 μmol·m-2·s-1，the contents of chlorophyll a，chlorophyll b，
chlorophyll a+b and carotenoid were significantly higher than that of those cultured in darkness．
And various pigment contents were increased with the increase of light intensity．In general，the
light intensity of 3-9 μmol·m-2·s-1 was beneficial for the growth and improvement of some
nutritional qualities of black soybean sprouts.
