[Decomposition and phosphorus dynamics of the litters in standing and litterbag of the Hangzhou Bay coastal wetland ].
Huan Jing Ke Xue
; 35(9): 3381-8, 2014 Sep.
Article
em Zh
| MEDLINE
| ID: mdl-25518655
ABSTRACT
Wetlands litter decomposition affects wetlands nutrient cycling. The decomposition progress of standing litter was monitored and the litterbag simulation experiment was carried out in order to analyze dynamics of litter decomposition and phosphorus release in Phragmites australis (PA), Spartina alterniflora (SA) and Scirpus mariqueter (SM) marshes of Hangzhou Bay coastal wetland. Results show that the dry mass of standing litter and P concentration decrease gradually and the litter drops to the sediment surface after 180 d. There are distinctive stages of the plant litter decomposition in litterbag simulation experiments. The loss rate is faster during 0- 15 d than that of later days. The loss rate in root decomposition of three plants are SM > PA > SA, while the trend is opposite for that of aboveground tissues. The time needed for 95% of dry mass decomposition in the plant tissues is between 1. 2- 8. 3 a. The P concentration in litters decreases rapidly in the initial stage and then increases slowly while the net P pools decreases all the time. Pearson's correlation coefficient shows that there is no significant correlation between the litter decomposition rate and C/N ratio. However, the litter C/P ratio affects greatly on plant decomposition rate. Environmental factors in the atmospheric temperature also have an impact on the decomposition rate of leaves. The different decomposition progresses between standing litter and litterbag are caused by environmental factors.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fósforo
/
Folhas de Planta
/
Áreas Alagadas
País/Região como assunto:
Asia
Idioma:
Zh
Ano de publicação:
2014
Tipo de documento:
Article