Effect of Lighting Framework on Yield and Quality of Chinese Medicine from Dioscorea Nipponica
不同采光结构对穿龙薯蓣产量和质量的影响

This study aimed to explore the effect of lighting frameworks such as non-shelf,branch-shelf,stick-shelf and network-shelf on the yield and quality of Chinese medicine from Dioscorea nipponica,which is a perennial twisted herbal liana.The stick-shelf and network-shelf have bigger leaves,lower contents of chlorophyll,higher activities of superoxide dismutase(SOD),hydrogen peroxidase(CAT) and peroxydase(POD),and higher content of malondialdehyde(MDA).But the activity of polyphenoloxidase(PPO) was lower.The yields from non-shelf,branch-shelf,stick-shelf and network-shelf were 0.70 kg/m2,1.13 kg/m2,1.34 kg/m2 and 1.51 kg/m2,respectively.The total contents of dioscin and protodioscin were 3.04%,3.95%,5.33% and 4.86%,respectively.But content from the wild was 4.04%.It indicates that the yield is mainly relied on the improvement of illumination condition.The Chinese medicinal quality improvement is related to the increase of light intensity.The increase of quality and production through network-shelf can offer good reference to other twining vine cultivation.