Abstract:In order to understand the effect of shading on leaf color and nutrient accumulation of Nandina domestica ‘Hongye’,the changes in physiological and biochemistry indexes were studied under different shading treatments,such as full light,30%,55%,and 70% shading.The results showed that the contents of chlorophyll and carotenoids increased with increment of shading,whereas relative content of anthocyanin decreased,and the content of soluble sugar had no difference.Along the prolonging of shading treatment,the relative content of anthocyanin and soluble sugar content increased,while the contents of chlorophyll and carotenoids increased in full light or 30% shading,fluctuated smoothly in 55% shading,and increased at first and then decreased in 75% shading.The content of leaf N was high under 75% shading,and those of P,K were high under 50% shading.The content of Ca decreased with the increment of shading.However,the contents of Mg,Fe had no differences among shading treatments.The correlation analysis showed that anthocyanin content had positive correlation with contents of soluble sugar or Ca (P<0.05),and negative correlation with content of N (P<0.05).The content of chlorophyll had positive correlation with the content of N (P<0.05),and negative correlation with contents of K or Ca (P<0.05).Therefore,shading environment could affect the contents of pigments,soluble sugar and mineral elements in N.domestica ‘Hongye’,and 30% shading was reasonable for a tradeoff between better growth and nice color.
