Effect of Excess Sludge on the Growth and Physiological Characteristics of Petunia hybrida

Using Petunia hybridas test material,the effect of primary sludge and composted sludge in South lake Campus of China University of Mining and Tecnology as culture medium on the growth and physiological characteristics of Petunia hybrid which was compared with normal farmland soil were studied.The results showed that primary sludge as well as composted sludge had positive effect on the growth and physiological characteristics of Petunia hybrida.Both of them were feasible acting as culture medium.Compared with primary sludge,the effect of composted sludge on the growth and physiological characteristics of Petunia hybrida were more notable,the plant height of Petunia hybrida increased by 32.36%,besides,the crown 35.50%,the branching amount 91.75%,the flower number 54.10%,the average flowering 25.52%,the average diameter of flower 10.47%.It promoted the vegetative growth and blossom quality of Petunia hybrida obviously and made Petunia hybrida more pleasing to eyes.In addition,the total chlorophyll content of Petunia hybridaincreased by 30.16%,the catalase activity 12.00%,the root activity 3.23%.It strengthened the photosynthetic intensity of Petunia hybrida.As well,it improved the anti-aging resistance and the root vigor of life.It proved better culture medium for Petuniahybrida.