Responses of Wetland Plants to Exogenous Nitrogen Inputs

CUI Li-juan; LI Sheng-nan; LI Wei; ZHANG Man-yin; ZHANG Yan; GAO Chang-jun; ZHAO Xin-sheng; WANG Yi-fei; ZHU Li

Semi-artificial control simulation was used to study the seasonal variation of nitrogen in soil and four types of wetland plants. The effects of different soil nitrogen contents on plant biomass were analyzed, the relationships between soil nitrogen and the nitrogen in wetland plants, and between soil nitrogen and plant biomass were analyzed. The results showed that the total nitrogen (TN) in Nymphaea tetragona and Phragmites australis had an inverse fluctuation after September while the TN in Iris wilsonii and Nymphaea tetragona reached the values of (19.93±4.63) g·kg-1and (60.49±7.75) g·kg-1 at a maximum soil nitrogen input of 80 g·m-2. The soil nitrogen, with the plants of Iris wilsonii and Nymphaea tetragona, changed downward in overall, while the soil nitrogen, with the plants of Phragmites australis and Salix purpurea, declined to the minimum value at September (Phragmites australis: (0.89±0.14) g·kg-1; Salix purpurea: (0.82±0.15) g·kg-1) and then increased. The seasonal variations in the biomass existed for the four types of wetland plants. The effects of soil nitrogen on plant biomass changed among different types of wetland plants. Exponential relationships were found between the soil nitrogen and plant biomass of Nymphaea tetragona and Salix purpurea. The soil nitrogen was related to the nitrogen in the four types of wetland plants, and a linear relationship was found between the soil nitrogen and the nitrogen in Phragmites australis, while the nitrogen in Salix purpurea changed quadratically with the soil nitrogen.

1. Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China

Received Date: 2012-02-19

Abstract: Semi-artificial control simulation was used to study the seasonal variation of nitrogen in soil and four types of wetland plants. The effects of different soil nitrogen contents on plant biomass were analyzed, the relationships between soil nitrogen and the nitrogen in wetland plants, and between soil nitrogen and plant biomass were analyzed. The results showed that the total nitrogen (TN) in Nymphaea tetragona and Phragmites australis had an inverse fluctuation after September while the TN in Iris wilsonii and Nymphaea tetragona reached the values of (19.93±4.63) g·kg-1and (60.49±7.75) g·kg-1 at a maximum soil nitrogen input of 80 g·m-2. The soil nitrogen, with the plants of Iris wilsonii and Nymphaea tetragona, changed downward in overall, while the soil nitrogen, with the plants of Phragmites australis and Salix purpurea, declined to the minimum value at September (Phragmites australis: (0.89±0.14) g·kg-1; Salix purpurea: (0.82±0.15) g·kg-1) and then increased. The seasonal variations in the biomass existed for the four types of wetland plants. The effects of soil nitrogen on plant biomass changed among different types of wetland plants. Exponential relationships were found between the soil nitrogen and plant biomass of Nymphaea tetragona and Salix purpurea. The soil nitrogen was related to the nitrogen in the four types of wetland plants, and a linear relationship was found between the soil nitrogen and the nitrogen in Phragmites australis, while the nitrogen in Salix purpurea changed quadratically with the soil nitrogen.

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Reference (20)

[1]	崔丽娟,艾思龙.湿地恢复手册-原则.技术与案例分析[M].北京:中国建筑工业出版社,2006:14-22
[2]	Gusewell S,Blooens U. Composition of plant species mixtures grown at various N∶ P ratios and levels of nutrient supply[J].Basic and Applied Ecology,2003,4(5): 453-466
[3]	崔丽娟,李伟,张曼胤,等.不同湿地植物对污水中氮磷去除的贡献[J].湖泊科学,2011,23(2):203-208
[4]	Dørge J. Modelling nitrogen transformations in fresh-water wetlands-estimating nitrogen-retention and removal in natural wetlands in relation to their hydrology and nutrient loadings[J].Ecological Modeling,1994,75-76:409-420
[5]	Chapin C T, Bridgham S D, Pastor J. pH and nutrient effects on above-ground net primary production in a Minnesota, USA bog and fen[J]. Wetlands,2004,24(1):186-201
[6]	Sajn S A,Bulc T G,Vrhovesk D. Comparison of nutrient cycling in a surface flow constructed wetland and in a facultative pond treating secondary effluent[J].Water Science Technology,2005,51(12): 291-298
[7]	刘德燕,宋长春,孙丽.外源氮输入对湿地植物生长及光合特征的影响[J].中国环境科学,2007,27(4):513-517
[8]	Steinbachová-Vojtí-kováL,Tylová E,Soukup A,et al. Influence of nutrient supply on growth,carbohydrate,and nitrogen metabolic relations in Typha angustifolia[J]. Environmental and Experimental Botany,2006,57(3):246-257
[9]	刘德燕,宋长春.湿地植物小叶章对外源氮输入的响应[J].应用生态学报,2008,19(12):2599-2604
[10]	王斌,李伟.不同N、P浓度条件下竹叶眼子菜的生理反应[J].生态学报,2002,22(10):1616-1621
[11]	王培,顾字飞,朱增银,等.不同营养状态下金鱼藻的生理响应[J].应用生态学报,2005,16(2):337-340
[12]	Olde Venterink H,Wassen M,Verkroost A W M,et al. Species richness-productivity patterns differ between N-,P-,and K-limited wetlands[J]. Ecology,2003,84(8):2191-2199
[13]	徐治国,何岩,闫百兴,等.湿地植物对外源氮、磷输入的响应研究[J].环境科学研究,2007,20(1):64-68
[14]	张耀鸿,张富存,李映雪,等.外源氮输入对互花米草生长及叶特征的影响[J].生态环境学报,2010,19(10): 2297-2301
[15]	张丽华,宋长春,王德宣.氮输入对沼泽湿地碳平衡的影响[J].环境科学,2006,27(7):1257-1263
[16]	李英臣,宋长春,刘德燕,等.不同氮输入梯度下草甸沼泽土反硝化损失和N₂O排放[J].环境科学研究,2009,22(9):1103-1107
[17]	刘德燕,宋长春,王丽,等.外源氮输入对湿地土壤有机碳矿化及可溶性有机碳的影响[J].环境科学,2008,29(12):3525-3530
[18]	孙志高,刘景双,杨继松,等.三江平原典型小叶章湿地硝化-反硝化与氧化亚氮排放[J].应用生态学报,2007,18(1):185-192
[19]	Aelion C M,Shaw J N. Denitrification in South Carolina (USA) coastal plain aquatic sediments[J].Journal of Environmental Quality,2000,29(5): 1696-1703
[20]	Dong L F,Thornton D C O,Nedwell D B,et al. Denitrification in sediments of the River Colne Estuary,England[J].Marine Ecology Progress Series,2000,203: 109-122

Responses of Wetland Plants to Exogenous Nitrogen Inputs

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通讯作者: 陈斌, bchen63@163.com

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