Distribution,Accumulation and Development of Element P in Middle Shoal Plants of Jiuduansha Wetlands

Abstract:

This paper presents a reach on the distribution,accumulation and development of P in all components of three kinds of wetland plants,scirpus mariqueter,spartina alterniflora and phragmites australis in the middle shoal of the Yangtse River.The results show that P contents are different in three kinds of plants,and their content order from high to low is as follows:scirpus mariqueter>phragmites australis>spartina alterniflora.P contents are different even in the same components.However,the three kinds of plants share a similar seasonal development trend of P content:P content decreases gradually with the growing of plants,and the loss of P is the greatest in the stalk,but the least in the root.P contents change slightly in the components of scirpus mariqueter,but change a lot in spartina alterniflora and phragmites australis.The change of P content in the plant is closely related with the variation of different element content in the soil and water,and in the early growing stage related little with P content of soil and water.The closest correlation appears at different time for these three different plants,which indicates the plants absorb element P at different optimum time.