摘要：AbstractThe light emitting diodes (LEDs), as a source of monochromic light, has been widely used in the field of agriculture and horticulture. We conducted a pot experiment to investigate the effect of LEDs (W, B, R1:B1:W1, R3:B1, R5:B1, R6:B1 and R) on growth and photosynthesis of soybean (Glycine maxL. viz. Huachun 6 (HC6), Huaxia 3 (HX3) and Guixiadou 2 (GXD2)) seedlings. The agronomic traits, physiological characteristics and photosynthetic capacity of soybean seedlings were determined. The result showed that root growth, photosynthetic pigment, plant height, stem diameter, hypocotyl length, epicotyl length, root dry weight and shoot dry weight were significantly affected with light treatment. Pn was much higher and the root growth was much better under red/blue mixed light (R5:B1) than the other treatment. Photosynthetic pigment of each cultivar was different under various treatments. This study demonstrates that the root growth and photosynthetic capacity of soybean seedling could be regulated by light treatments. Therefore, it is important the effectiveness of light quality for growth and morphogenesis of soybean seedling.
