Effects of Shading on the Growth and Physiological Indexes of Platycodon grandiflorus Seedlings
To explore effects of shading on the growth and physiological indicators of Platycodon grandiflorus seedlings and reveal the sha-de tolerance,four shading treatments including full sunlight(T0),50％sunlight(T1),25％sunlight(T2)were set,the changs of morphological parameter and physiological indexes of P.grandiflorus seedlings were researched.The results showed that under T2,height of seedlings was biggest,and significantly higher than the control(P＜0.05),but not than T1(P＞0.05).Both ground diameter,leaves area and biomass were significantly reduced under T3.Soluble protein content in leaves increased under T1 and T2,and was significantly higher than the con-trol(P＜0.05),the soluble sugar also showed similar changes,but T3 caused a significant decrease in soluble protein and soluble sugar.Under T1 and T2,MDA decreased in the leaves and significantly lower than the control(P＜0.05),but T3 caused a significant increase in MDA.Through comprehensive analysis of Fuzzy,the comprehensive subordinate function value of seedlings under four treatments were 3.125,8.361,5.960 and 0,respectively,and that under T1 was the biggest.Moderate shading does not adversely affect the normal develop-ment of P.Grandiflorus,and 50％mild shading can provide superior growth conditions for the growth of P.grandiflorus seedlings.
万方数据
维普
