Effect of Shading on Leaf Area and Chlorophyll Contents of Ophiopogonis japonicus and Hosta plantaginea

The effect of different shading levels on leaf area and chlorophyll contents of Ophiopogonisj aponicus and Hosta plantaginea were studied.To urban greening of Ophiopogonis japonicus and Hosta plantaginea as the research object,under three different shading levels with full shade(20%to 30%full sunlight),semi-shade(50%to 60%full sunlight),no shading(full sunlight),the size of leaf area,the content of chlorophyll a and b,and chlorophyll a / b value were measured and analyzed.The results showed that the degree of shading increases,leaf area enlarges,the content of chlorophyll a and b increased,but the increase rate of chlorophyll b were larger than chlorophyll a,chlorophyll a / b value decreased.Ophiopogonis japonicus and Hosta plantaginea were strongly able to endure shade,suitable for indoor furnishings and a large crown density garden configuration.