img

官方微信

  • CN 62-1070/P
  • ISSN 1000-694X
  • 双月刊 创刊于1981年
高级检索
中国地理学会沙漠分会2012年学术研讨会论文选

温度对生物土壤结皮斑块土壤氮矿化作用的影响

  • 虎 瑞1 ,
  • 王新平1 ,
  • 张亚峰1 ,
  • 潘颜霞1 ,
  • 石 勇2 ,
  • 刘美玲2
展开
  • 1.中国科学院寒区旱区环境与工程研究所 沙坡头沙漠试验研究站, 甘肃 兰州 730000;
    2.中国科学院寒区旱区环境与工程研究所 植物逆境生理生态与生物技术实验室, 甘肃 兰州 730000

收稿日期: 2012-09-09

  修回日期: 2012-12-19

  网络出版日期: 2012-12-19

Effects of Temperature on Soil Net Nitrogen Mineralization under Different Biological Soil Crusts in Shapotou, Northern China

Expand
  • 1.Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2.Laboratory of Plant Stress Ecophysiology and Biotechnology, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Received date: 2012-09-09

  Revised date: 2012-12-19

  Online published: 2012-12-19

摘要

以腾格里沙漠东南缘天然植被区藓类结皮、藻地衣结皮斑块荒漠土壤为研究对象,采用原状土培养法,在人工气候箱中设置不同温度(-10、5、15、25、35、40 ℃)培养14 d,测定土壤样品在培养前后NH+4-N和NO-3-N含量,分析两种生物土壤结皮斑块土壤净硝化和净矿化速率对温度的响应。结果表明:①低温培养条件下(-10~15 ℃)土壤氮转化以固持态为主,随着温度升高,尤其当温度超过25 ℃后,藓类结皮、藻地衣结皮斑块土壤净硝化和净氮矿化速率显著提高(p<0.05);②同一温度培养下,以藓类结皮发育为主的土壤氮转化水平较高,净硝化速率和净氮矿化速率以及无机氮的积累明显大于以藻地衣结皮发育为主的土壤;③两种生物土壤结皮斑块土壤净氮转换速率(硝化和矿化)Q10值在2.46~3.33间波动,其中藓类结皮斑块土壤氮转换对温度的敏感性较高。此外,在土壤氮总矿化过程中,硝化过程具有较强的温度敏感性。高温促进了土壤净氮矿化水平,增加土壤氮有效性,因此可能会对荒漠生态系统的初级生产力产生正向影响作用。

本文引用格式

虎 瑞1 , 王新平1 , 张亚峰1 , 潘颜霞1 , 石 勇2 , 刘美玲2 . 温度对生物土壤结皮斑块土壤氮矿化作用的影响[J]. 中国沙漠, 2013 , 33(2) : 522 -528 . DOI: 10.7522/j.issn.1000-694X.2013.00071

Abstract

Effects of temperature on soil net nitrogen transformation rates (nitrification and mineralization) under moss-covered soil and algae-lichen-covered soil were evaluated by measuring the concentrations of NH+4-N and NO-3-N of undisturbed soil cores incubated in artificial chamber after 14 days of incubation with a temperature gradient of -10, 5, 15, 25, 35, 40 ℃. Results showed that: (1) immobilization was the main form in the nitrogen transformation (nitrification and mineralization) under the lower incubation temperatures (-10~15 ℃), the net nitrification and mineralization rates increased significantly (p<0.05) with increasing temperature, especially when the temperature surpassed 25 ℃; (2) the moss-dominated soil facilitated the nitrogen transformation, the rates of net nitrification, nitrogen mineralization, and the contents of inorganic nitrogen in moss-dominated soil were higher than in algae-lichen-dominated soil; (3) the Q10 values of nitrogen transformation rates ranged from 2.46 to 3.33. In addition, the net nitrogen transformation rates of moss-dominated soil were more sensitive to temperature variation than algae-lichen-covered soil. Concerning the whole nitrogen transformation process, nitrification was more sensitive to temperature than mineralization. Higher temperature is beneficial to soil net nitrogen mineralization rate and the biological soil crusts can enhance the availability of nitrogen, which may affect the primary productivity in desert ecosystems.

参考文献

[1]李明锐,沙丽清.西双版纳不同土地利用方式下土壤氮矿化作用研究[J].应用生态学报,2005,16(1):54-58.

[2]Ross D S,Lawrence G B,Fwdriksen G.Mineralization and nitrification patterns at eight northeastern USA forested research sites[J].Forest Ecology and Management,2004,188:317-335.

[3]孟盈,薛敬意,沙丽清,等.西双版纳不同热带森林下土壤铵态氮和硝态氮动态研究[J].植物生态学报,2001,25(1):99-104.

[4]李检舟,沙丽清,王君,等.云南哀牢山中山湿性常绿阔叶林土壤氮矿化季节变化[J].山地学报,2006,24(2):186-192.

[5]Rustad L E,Campbell J L,Marion G M,et al.A meta-analysis of the response of soil respiration,net nitrogen mineralization,and aboveground plant growth to experimental ecosystem warming[J].Oecologia,2001,126:543-562.

[6]Butler S M,Melillo J M,Johnson J E,et al.Soil warming alters nitrogen cycling in a New England forest:Implications for ecosystem function and structure[J].Oecologia,2011,168:819-868.

[7]Bowden W B.Gaseous nitrogen emissions from undisturbed terrestrial ecosystems an assessment of their impacts on local and global nitrogen budgets[J].Biogeochemistry,1986,2:249-279.

[8]王新平,李新荣,潘颜霞,等.我国温带荒漠生物土壤结皮孔隙结构分布特征[J].中国沙漠,2011,31(1):58-62.

[9]石勇,赵昕,贾荣亮,等.逐渐干旱胁迫下生物土壤结皮中真藓和土生对齿藓的活性氧清除机制[J].中国沙漠,2012,32(3):683-690.

[10]刘艳梅,李新荣,何明珠,等.生物土壤结皮对土壤微生物量碳的影响[J].中国沙漠,2012,32(3):669-673.

[11]苏延桂,李新荣,赵昕,等.紫外辐射增强对不同发育阶段荒漠藻结皮光合作用的影响[J].中国沙漠,2011,31(4):889-893.

[12]苏延桂,李新荣,贾小红,等.温带荒漠区藻结皮固氮活性沿时间序列的变化[J].中国沙漠,2012,32(2):421-427.

[13]张鹏,李新荣,胡宜刚,等.湿润持续时间对生物土壤结皮固氮活性的影响[J].生态学报,2011,31(20):6116-6124.

[14]Belnap J,Lange O L.Biological Soil Crusts:Structure,Function,and Management[M].Berlin:Springer-Verlag,2003:263-181.

[15]Delgado-Baquerizo M,Castillo-Monroy A P,Maestre F T.Antonio Gallardo Plants and biological soil crusts modulate the dominance of N forms in a semi-arid grassland[J].Soil Biology and Biochemistry,2010,42:376-378.

[16]Castillo-Monroy A P,Maestre F T,Delgado-Baquerizo M,et al.Biological soil crusts modulate nitrogen availability in semi-arid ecosystems:insights from a Mediterranean grassland[J].Plant and Soil,2010,333:21-34.

[17]Li X R,Wang X P,Li T,et al.Microbiotic soil crust and its effect on vegetation and habitat on artificially stabilized desert dunes in Tengger Desert,north China[J].Biology and Fertility Soils,2002,35:147-154.

[18]Li X R,He M Z,Zerbe S,et al.Micro-geomorphology determines community structure of biological soil crusts at small scales[J].Earth Surface Processes and Landforms,2010,35(8):932-940.

[19]王新平,张景光,李新荣,等.沙坡头地区多年降水分布特征趋势及其变率[J].中国沙漠,2001,21(30):260-261.

[20]冯丽,李新荣,郭群,等.腾格里沙漠东南缘公路对路域植被物种组成的影响[J].应用生态学报,2011,22(5):1114-1120.

[21]Zhou C P,Ouyang H.Effect of temperature on n itrogen mineraliz ation at optimum and satu rated soil water content in two types of forest in Changbai Mountain[J].Acta Ecologica Sinica,2001,21(9):1469-1473.

[22]Mulvaney R L.Nitrogen-inorganic forms[M]//Sparks D L,et al(Eds.).Methods of Soil Analysis,3rd edn.Soil Science Society of America and American Society of Agronomy.Madison,1996.

[23]Jackson M L.Soil Chemical Analysis[M].Prentice-Hall,Englewood Cliffs,1958.

[24]Dalias P,Anderson J M,Bottner P,et al.Temperature responses of net N mineralization and nitrification in conifer forest soils incubated under standard laboratory conditions[J].Soil Biology and Biochemistry,2002,34:691-701.

[25]Sierra J.Temperature and soil moisture dependence of N mineralization in intact soil cores[J].Soil Biology and Biochemistry,1997,29:1557-1563.

[26]Gon alves J L M,Carlyle J C.Modelling the influence of moisture and temperature on net nitrogen mineralization in a forested sandy soil[J].Soil Biology and Biochemistry,1994,26:1557-1564.

[27]Cookson W R,Cornforth I S,Rowarth J S.Winter soil temperature (2-15 ℃) effects on nitrogen transformations in clover green manure amended or unamended soils: a laboratory and field study[J].Soil Biology and Biochemistry,2002,34:1401-1415.

[28]Heumann S,Bttcher J.Temperature functions of the rate coefficients of net N mineralization in sandy arable soils.Part I:derivation from laboratory incubations[J].Journal of Plant Nutrition and Soil Science,2004,167:381-389.

[29]周才平,欧阳华.温度和湿度对暖温带落叶阔叶林土壤氮矿化的影响[J].植物生态学报,2001,25(2):204-209.

[30]邹亚丽,韩方虎,耿丽英,等.温度和湿度对紫花苜蓿土壤氮矿化的影响[J].草业学报,2010,19(4):101-107.

[31]Miklinska M,Maryanski M,Laskowski R,et al.Effect of temperature on humus respiration rate and nitrogen mineralization: Implications for global climate change[J].Biogeochemistry,1999,44:239-257.

[32]王常慧,邢雪荣,韩兴国.温度和湿度对我国内蒙古羊草草原土壤净氮矿化的影响[J].生态学报,2004,24(11):2472-2476.

[33]李新荣,肖洪浪,刘立超,等.腾格里沙漠沙坡头地区固沙植被对生物多样性恢复的长期影响[J].中国沙漠,2005,25(2):173-181.

[34]Liu Y M,Li X R,Jia R L,et al.Effects of biological soil crusts on soil nematode communities following dune stabilization in the Tengger Desert,Northern China[J].Applied Soil Ecology,2011,49:118-124.

[35]Forsum A,Dahlman L,N sholm T,et al.Nitrogen utilization by Hylocomium splendens in a boreal forest fertilization experiment[J].Functional Ecology,2006,20:421-426.

[36]吴建国,苌伟,艾丽,常学向.祁连山中部四种典型生态系统土壤氮矿化的研究[J].生态环境,2007,16(3):1000-1006.

[37]徐宪根,周焱,阮宏华,等.武夷山不同海拔高度土壤氮矿化对温度变化的响应[J].生态学杂志,2009,28(7):1298-1302.

[38]Van Schll L,Van Dam A M,Leffelaar P A.Mineralisation of nitrogen from an incorporated catch crop at low temperatures:Experimental and simulation[J].Plant and Soil,1997,188:211-219.

文章导航

/