[Seasonal dynamics of nitrogen- and phosphorus absorption efficiency of wetland plants in Minjiang River estuary].
Taking the native Phragmites australis and invasive Spartina alterniflora in Minjiang River estuary as test objectives, this paper studied the seasonal dynamics of their biomass and nitrogen- and phosphorus absorption efficiency. A typical single-peak curve was presented for the seasonal dynamics of aboveground biomass and nitrogen- and phosphorus absorption efficiency of the two species. P. australis had the maximum aboveground biomass (2195.33 g X m(-2)) in summer, while S. alterniflora had it (3670.02 g X m(-2)) in autumn. The total nitrogen (TN) and total phosphorus (TP) contents of P. australis reached the peak (21.06 g x m(-2) of TN and 1.12 g x m(-2) of TP) in summer and in autumn, respectively, while those of S. alterniflora all reached the peak (26.76 g x m(-2) of TN and 3.23 g x m(-2) of TP) in autumn. Both of the two species had a higher absorption efficiency in TN than in TP (P < 0.01), and S. alterniflora had a significantly higher absorption efficiency of TN and TP than P. australis (P < 0.05). To some extent, the N/P, C/N, and C/P ratios of plants could indicate the nitrogen- and phosphorus absorption efficiency of the plants.
School of Geographical Science, Fujian Normal University, Fuzhou 350108, China. zhangwenlong027@163.com
Wen-Long
WL
Zhang
Cong-Sheng
CS
Zeng
Lin-Hai
LH
Zhang
Wei-Qi
WQ
Wang
Yan
Y
Lin
Jin-Quan
JQ
Ai
D000042:Absorption; D002681:China; D009584:Nitrogen / Q000378:metabolism*; D010758:Phosphorus / Q000378:metabolism*; D006109:Poaceae / Q000378:metabolism*; D045483:Rivers; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D053833:Wetlands
D014874:Water Pollutants, Chemical; D010758:Phosphorus; D009584:Nitrogen