不同水分条件下苔藓结皮光合能力对氮素添加量的响应

闫佳毅; 张宇清; 秦树高; 吴斌; 冯薇; 邵晨曦; 法科宇

doi:10.13961/j.cnki.stbctb.2015.06.013

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不同水分条件下苔藓结皮光合能力对氮素添加量的响应

试验研究

- 不同水分条件下苔藓结皮光合能力对氮素添加量的响应
- Responses of Bryophytes' Photosynthesis to Nitrogen Addition Under Different Water Content
- 水土保持通报 2015年35卷第6期页码：75-80
- 作者机构：
  
  北京林业大学水土保持学院宁夏盐池毛乌素沙地生态系统国家定位观测研究站,北京,100083
- 作者简介：
- 基金信息：
  
  "十二五"科技支撑计划项目"荒漠化地区退化土地治理与植被保育技术集成与示范"(2012 BAD16 B02)
- DOI：10.13961/j.cnki.stbctb.2015.06.013
  中图分类号：
- 纸质出版：2015
- 稿件说明：
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闫佳毅, 张宇清, 秦树高, 等. 不同水分条件下苔藓结皮光合能力对氮素添加量的响应[J]. 水土保持通报, 2015,35(6):75-80.

YAN Jiayi, ZHANG Yuqing, QIN Shugao, et al. Responses of Bryophytes' Photosynthesis to Nitrogen Addition Under Different Water Content[J]. Bulletin of Soiland Water Conservation, 2015, 35(6): 75-80.
闫佳毅, 张宇清, 秦树高, 等. 不同水分条件下苔藓结皮光合能力对氮素添加量的响应[J]. 水土保持通报, 2015,35(6):75-80. DOI： 10.13961/j.cnki.stbctb.2015.06.013.

YAN Jiayi, ZHANG Yuqing, QIN Shugao, et al. Responses of Bryophytes' Photosynthesis to Nitrogen Addition Under Different Water Content[J]. Bulletin of Soiland Water Conservation, 2015, 35(6): 75-80. DOI： 10.13961/j.cnki.stbctb.2015.06.013.

摘要

[目的

]

探究苔藓结皮失水过程中光合能力对不同梯度氮添加的响应

为进一步研究苔藓结皮对氮沉降的响应过程以及为干旱、半干旱区荒漠生态系统的管理提供理论依据。[方法

]

选取毛乌素沙地的优势藓种拟双色真藓(Bryum pachytheca)为研究对象

在控制条件下采用氮添加的模拟试验手段。[结果

]

苔藓结皮净光合速率在低于0.2 g/(m

·a)的氮添加量时受到促进

在高于0.2 g/(m

·a)的氮素添加量下

低水分含量时被抑制

高水分含量时会受促进;同时

0.2 g/(m

·a)是苔藓结皮能承受的最优氮添加量

此时苔藓结皮的光合固碳能力达到最大

年光合固碳量为对照条件的2倍。[结论

]

氮沉降引起的氮素增加对于干旱、半干旱区苔藓结皮的光合能力以及固碳潜力具有显著的影响。

Abstract

[Objective] The responses of bryophytes' photosynthesis to nitrogen addition in the process of its dehydration were studied in order to demonstrate how it will respond to nitrogen deposition and to provide relevant theoretical knowledge for management of desert ecosystems in arid or semi-arid region.[Methods] The dominant bryophytes

Bryum pachytheca in Mu Us desert was selected to examine the responses of bryophytes' photosynthesis to nitrogen addition with eight levels.[Results] The net photosynthetic rates of bryophytes(Pn) increased when nitrogen addition was less than 0.2 g/(m2·a). When nitrogen addition was over 0.2 g/(m2·a)

the responses of Pn varied under different water condition. It was enhanced under high levels of water content

and was suppressed under low levels. In terms of bryophytes' photosynthetic carbon sequestration capacity in tested site

the optimal adding amount of nitrogen was 0.2 g/(m2·a). At this addition amount

carbon fixed by bryophytes' photosynthesis was doubled as compared with that without adding nitrogen.[Conclusion] Nitrogen increment from deposition can strongly influence photosynthesis and carbon sequestration capacity of bryophytes in arid and semi-arid regions.

关键词

Keywords

references

Bobbink R, Hicks K, Galloway J, et al. Global assessment of nitrogen deposition effects on terrestrial plant diversity:A synthesis[J]. Ecological Applications, 2010,20(1):30-59.

Holland E A, Dentener F J, Braswell B H, et al. Contemporary and pre-industrial global reactive nitrogenbudgets[J]. Biogeochemistry, 1999,46(1):7-43.

Vitousek P M, Aber J D, Howarth R W, et al. Human alteration of the global nitrogen cycle:Sources and consequences[J]. Ecological applications, 1997,7(3):737-750.

Galloway J N, Dentener F J, Capone D G, et al. Nitrogen cycles:Past, present, and future[J]. Biogeochemistry, 2004,70(2):153-226.

Emanuel W R, Shugart H H, Stevenson M P. Climatic change and the broad-scale distribution of terrestrial ecosystem complexes[J]. Climatic Change, 1985,7(1):29-43.

李守中,肖洪浪,罗芳,等.沙坡头植被固沙区生物结皮对土壤水文过程的调控作用[J].中国沙漠,2005,25(2):228-233.

Li Xinrong, Zhang Zhishan, Wang Xiaoping, et al. The ecohydrology of the soil-vegetation system restoration in arid zones:A review[J]. Journal of Desert Research, 2009,29(5):845-852.

Lange O L. Photosynthesis of Soil-crust Biota as Dependent on Environmental Factors[M]//Biological Soil Crusts:Structure, Function, and Management. Springer Berlin Heidelberg, 2003:217-240.

Evans R D, Lange O L. Biological Soil Crusts and Ecosystem Nitrogen and Carbon Dynamics[M]//Biological Soil Crusts:Structure, Function, and Management. Springer Berlin Heidelberg, 2003:263-279.

Lange O L, Kidron G J, Budel B, et al. Taxonomic composition and photosynthetic characteristics of the biological soil crusts' covering sand dunes in the western Negev Desert[J]. Functional Ecology, 1992,13(6):519-527.

Britton A J, Fisher J M. Interactive effects of nitrogen deposition, fire and grazing on diversity and composition of low-alpine prostrate Calluna vulgaris heathland[J]. Journal of Applied Ecology, 2007,44(1):125-135.

MäkipääR, Heikkinen J. Large-scale changes in abundance of terricolous bryophytes and macrolichens in Finland[J]. Journal of Vegetation Science, 2003,14(4):497-508.

周晓兵,张元明,王莎莎,等.模拟氮沉降和干旱对准噶尔盆地两种一年生荒漠植物生长和光合生理的影响[J].植物生态学报,2010,34(12):1394-1403.

Su Jie, Li Xinrong, Li Xiaojun, et al. Effects of additional N on herbaceous species of desertified steppe in arid regions of China:A four-year field study[J]. Ecological research, 2013,28(1):21-28.

明姣,赵允格,许明祥,等.黄土高原不同侵蚀类型区生物结皮固氮活性及对水热因子的响应[J].应用生态学报,2013,24(7):1849-1855.

Zaady E, Groffman P, Shachak M. Nitrogen fixation in macro-and microphytic patches in the Negev desert[J]. Soil Biology and Biochemistry, 1998,30(4):449-454.

Bates B C, Kundzewicz Z W, Wu S, et al. Climate Change and Water[C]. Technical Paper of the Intergovernmental Panel on Climate Change. IPCC Secretariat:Geneva, Switzerland, 2008.

黎兴江.中国苔藓志:第四卷·真藓目[M].北京:科学出版社,2006.

甲荣亮.腾格里沙漠人工植被区苔藓类结皮光和生理生态学研[D].甘肃兰州:中国科学院寒区旱区环境与工程研究所,2009.

吴福忠,包维楷,吴宁.外源施N对干旱河谷白刺花(Sophoradavidii)幼苗生长,生物量及C, N, P积累与分配的影响[J].生态学报,2008,28(8):3817-3824.

Andrews M, Sprent J I, Raven J A, et al. Relation-ships between shoot to root ratio, growth and leaf soluble protein concentration of Pisum sativum, Phaseolus vulgaris and Triticum aestivum under different nutrient deficiencies[J]. Plant, Cell & Environment, 1999,22(8):949-958.

Feng Wei, Zhang Yuqing, Wu Bing, et al. Influence of environmental factors on carbon dioxide exchange in biological soil crusts in desert areas[J]. Arid Land Research and Management, 2014,28(2):186-196.

张颖.中国不同区域大气氮沉降的监测及华北大气氮沉降的模拟[D].北京:中国农业大学,2009.

Lange O L, Kidron G J, Budel B, et al. Taxonomic composition and photosynthetic characteristics of the‘biological soil crusts’covering sand dunes in the Western Negev Desert[J]. Functional Ecology, 1992,6(5):519-527.

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