苦草根系对硝氮和氨氮的吸收

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摘要

硝氮(NO₃^--N)和氨氮(NH₄⁺-N)是湖泊沉积物间隙水生物可利用氮源的主要形态。论文通过稳定性同位素¹⁵N示踪技术,通过模拟实验分别研究了苦草根系对NH₄⁺-N和NO₃^--N的吸收及其与氮浓度的关系。结果显示,苦草(Vallisnerianatan)根系对NH₄⁺-N的吸收显著高于NO₃^--N;根系吸收氮后向叶转移,而且NO₃^--N为氮源时其转移速率较高;NH₄⁺-N浓度的变化对苦草吸收NO₃^--N有影响,当NH₄⁺-N浓度小于0.072mmol/L时,根系对NO₃^--N的吸收随NH₄⁺-N浓度的增加而增加,随后降低并趋于平稳;同时,NO₃^--N浓度对苦草吸收NH₄⁺-N也有类似的影响。

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	徐昇
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关键词 ：苦草, 根, 稳定同位素, 氨氮, 硝氮

Abstract：

Nitrate(NO₃^--N) and ammonium(NH₄⁺-N) are the main forms of biological available nitrogen source in the sediment pore water of lakes.In this paper,using stable isotope 15N tracer technique and simulation experiments,we studied the uptake of NH₄⁺-N and NO₃^--N by roots of Vallisneria natans respectively,and their relationships with the concentration of nitrogen.The results showed that the uptake of NH₄⁺-N was significantly higher than that of NO₃^--N.Nitrogen was transferred to shoot after it was absorbed,and the transfer rate of NO₃^--N was relatively high.The concentrations of NH₄⁺-N affected the uptake of NO₃^--N significantly.When the concentration of NH₄⁺-N was less than 0.072 mmol/L,the uptake of NO₃^--N increased with the increase of NH₄⁺-N,then decreased and then maintained a steady state.The effect of NO₃^--N on the uptake of NH₄⁺-N by the roots had a similar pattern.

Key words： Vallisneria natans root stable isotope ammonium

收稿日期: 2012-06-25

Q503

基金资助:国家水专项(2009ZX07106-002)

引用本文:

徐昇1, 李欣1, 钟萍1, 刘正文1,2*. 苦草根系对硝氮和氨氮的吸收[J]. , 2012, 31(3): 312-317.
XU Sheng1, LI Xin1, ZHONG Ping1, LIU Zheng-wen1,2. The uptake of nitrate and ammonium by the root of Vallisneria natans. , 2012, 31(3): 312-317.

链接本文:

http://www.ecolsci.com/CN/Y2012/V31/I3/312

[1] Jeppesen E,Jensen J P,S ndergaard M,Lauridsen T,Pedersen L J,Jensen L.Top-down control in freshwaterlakes:the role of nutrient state,submerged macrophytes andwater depth[J].Hydrobiologia,1997,342:151-164.
[2] Moss B.Engineering and biological approaches to therestoration from eutrophication of shallow lakes in whichaquatic plant communities are important components[J].Hydrobiologia,1990,200(1):367-377.
[3] Scheffer M,Hosper S H,Meijer M L,Moss B,Jeppesen E.Alternative equilibria in shallow lakes[J].Trends in Ecology,1993,8(8):275-279.
[4] Jeppesen E.The structuring role of submerged macrophytesin lakes[M].New York:Springer,1998.
[5] Meerhoff M,Mazzeo N,Moss B,Rodríguez-Gallego L.Thestructuring role of free-floating versus submerged plants in asubtropical shallow lake[J].Aquatic Ecology,2003,37(4):377-391.
[6] 秦伯强,高光,胡维平,吴庆龙,胡春华,刘正文,谷孝鸿,朱广伟,陈非洲.浅水湖泊生态系统恢复的理论与实践思考[J].湖泊科学,2005,17(1):9-16.
[7] Bristow J M,Whitcombe M.The role of roots in the nutritionof aquatic vascular plants[J].Botany,1971,58(1):8-13.
[8] Loczy S,Carignan R,Planas D.The role of roots in carbonuptake by the submersed macrophytes Myriophyllumspicatum,Vallisneria americana,and Heteranthera dubia[J].Hydrobiologia,1983,98(1):3-7.
[9] Thursby G B,Harlin M M.Interaction of leaves and roots ofRuppia maritima in the uptake of phosphate,ammonia andnitrate[J].Marine Biology,1984,83(1):61-67.
[10] Nichols D S,Keeney D R.Nitrogen nutrition of Myriophyllum spicatum:uptake and translocation of ¹⁵N byshoots and roots[J].Freshwater Biology,1976,6(2):145-154.
[11] Best M D,Mantai K E.Growth of Myriophyllum:sedimentor lake water as the source of nitrogen and phosphorus[J].Ecology,1978,59(5):1075-1080.
[12] Barko J W,Smart R M.Sediment-based nutrition ofsubmersed macrophytes[J].Aquatic Botany,1981,10:339-352.
[13] Romero J,Lee K S,P'erez M,Mateo M A,Alcoverro T.Nutrient dynamics in seagrass ecosystems[J].Biomedicaland Life Sciences,2006,227-254.
[14] Caffrey J M,Kemp W M.Influence of the submersed plant,Potamogeton perfoliatus,on nitrogen cycling in estuarinesediments[J].Limnology and Oceanography,1992,37(7):1483-1495.
[15] Stapel J,Aarts T L,Van Duynhoven B H M,De Groot J D,Van den Hoogen P H W,Hemminga M A.Nutrient uptakeby leaves and roots of the seagrass Thalassia hemprichii inthe Spermonde Archipelago,Indonesia[J].Marine EcologyProgress Series,1996,134(1):195-206.
[16] Ozimek T,Donk E,Gulati R D.Growth and nutrient uptakeby two species of Elodea in experimental conditions andtheir role in nutrient accumulation in amacrophyte-dominated lake[J].Hydrobiologia,1993,251(1):13-18.
[17] 常会庆,李娜,徐晓峰.三种水生植物对不同形态氮素吸收动力学研究[J].生态环境,2008,17(2):511-514.
[18] Mark M Littler,Diane S Littler.Handbook of phycologicalmethods:Ecological field methods:macroalgae[M].1985,Cambridge University Press.
[19] Knowles R,Blackburn T H.Nitrogen isotope techniques[M].1993,Academic Press.
[20] 古滨河.2005.生态系统生态学研究中的稳定同位素标记技术[C]. 第三届现代生态学讲座暨国际学术研讨会,北京.2005.
[21] 包苑榆,钟萍,韦桂峰,郭海森,刘正文.基于¹⁵N稳定同位素技术的斜生栅藻对硝氮和氨氮吸收研究[J].水生态学杂志,2011,32(3):16-20.
[22] 刘从玉,刘平平,刘正文,陈清,柴夏.沉水植物在生态修复和水质改善中的作用——以惠州南湖生态系统的修复与构建(中试)工程为例[J].安徽农业科学,2008,36(7):2908-2910.
[23] 刘玉超,于谨磊,陈亮,刘正文.浅水富营养化湖泊生态修复过程中大型沉水植物群落结构变化以及对水质影响[J].生态科学,2009,27(5):376-379.
[24] Vermeer C P,Escher M,Portielje R,de Klein J J M.Nitrogen uptake and translocation by Chara[J].AquaticBotany,2003,76(3):245-258.
[25] Nayar S,Collings G J,Miller D J,Bryars S,Cheshire A C.Uptake and resource allocation of ammonium and nitrate intemperate seagrasses Posidonia and Amphibolis[J].MarinePollution Bulletin,2010,60(9):1502-1511.
[26] Zhang L Y,Li K Y,Liu Z W,Middelburg J J.Sedimentedcyanobacterial detritus as a source of nutrient for submergedmacrophytes(Vallisneria spiralis and Elodea nuttallii):Anisotope labeling experiment using N-15[J].Limnology andOceanography,2010,55(5):1912-1917.
[27] Pedersen M F,Borum J.Nitrogen dynamics of eelgrassZostera marina during a late summer period of high growthand low nutrient availability[J].Marine Ecology ProgressSeries,1992,80:65-73.
[28] Room P M,Thomas P A.Nitrogen,phosphorus andpotassium in Salvinia molesta Mitchell in the field:effectsof weather,insect damage,fertilizers and age[J].AquaticBotany,1986,24(3):213-232.
[29] Cedergreen N,Madsen T V.Nitrogen uptake by the floatingmacrophyte Lemna minor[J].New Phytologist,2002,155(2):285-292.
[30] Roth N C,Pregnall A M.Nitrate reductase activity inZostera marina[J].Marine Biology,1988,99(4):457-463.
[31] Syrett P J.Nitrogen metabolism of microalgae[J].Can BullFish Aquat Sci,1981,210:182-210.
[32] Hanisak M D,Harlin M M.Uptake of inorganic nitrogen byCodium fragile subsp.Tomentosoides(chlorophyta)[J].Journal of Phycology,1978,14(4):450-454.
[33] D'Elia C F,DeBoer J A.Nutritional studies of two red algae:II.Kinetics of ammonium and nitrate uptake[J].Journal ofPhycology,1978,14(3):266-272.
[34] Haines K C,Wheeler P A.Ammonium and nitrate uptake bythe marine macrophytes Hypnea musciformis(Rhodophyta)and Macrocystis pyrifera(Phaeophyta).[J].Journal ofPhycology,1978,14(3):319-324.
[35] Kronzucker H J,Siddiqi M Y,Glass A D M,Kirk G J D.Nitrate-ammonium synergism in rice.A subcellular fluxanalysis[J].Plant Physiology,1999,119(3):1041-1046.
[36] 任军,徐程扬,林玉梅,周睿智,张爱花.水曲柳幼苗根系吸收不同形态氮的动力学特征[J].植物生理学通讯,2008,44(5):919-922.
[37] 段英华,张亚丽,沈其荣.增硝营养对不同基因型水稻苗期吸铵和生长的影响[J].土壤学报,2005,42(2):260-265.
[38] Saravitz C H,Chaillou S,Musset J,Raper C D,Morot-Gaudry J F.Influence of nitrate on uptake ofammonium by nitrogen-depleted soybean:is the effectlocated in roots or shoots?[J].Journal of ExperimentalBotany,1994,45(11):1575.
[39] Cohen R A,Fong P.Nitrogen uptake and assimilation inEnteromorpha intestinalis(L.) Link(Chlorophyta):usingN-15 to determine preference during simultaneous pulses ofnitrate and ammonium[J].Journal of Experimental MarineBiology and Ecology,2004,309(1):67-77.