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环境化学  2015 

氮沉降影响下酸性森林土壤中水溶性有机氮的分布特征

Keywords: 水溶性有机氮,氮沉降,酸性森林土壤

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Abstract:

选取贵州雷公山(LGS)和重庆铁山坪(TSP)两个氮沉降量具有明显差异的森林小流域,对土壤中水溶性有机氮(WSON)的分布特征进行了对比研究.在氮沉降较低的LGS流域土壤水中WSON占总氮的比例可达30%—60%,显著高于氮沉降高的TSP流域.TSP流域土壤浸提液中WSON的比例相较于土壤水有显著增加,说明该流域中WSON多附着于土壤表面,流动性较弱.在0—90cm典型剖面内,TSP流域WSON的比例显著高于LGS流域.两剖面中WSON的比例均在中部(30—60cm)达到最高值,分别为35.37%和55.82%.两剖面中WSON和WSOC的纵向变化不完全同步,WSOM的C/N比值在剖面中部有低谷.在剖面中、下部(30—90cm)TSP流域WSOM的C/N比值低于LGS流域,说明该流域WSOM中氮的富集程度更高.

References

[1]  刘艳,周国逸,刘秀菊. 陆地生态系统可溶性有机氮研究进展[J].生态学杂志, 2005, 24(5):573—577
[2]  郝敬梅,崔晓阳. 阔叶红松林和人工红松林土壤中可溶性有机氮的对比[J].东北林业大学学报,2008, 36(8): 11—13
[3]  Jones D L, Hughes L T, Murphy D V, et al. Dissolved organic carbon and nitrogen dynamics in temperate coniferous forest plantations [J]. Eur J Soil Sci, 2008, 59: 1038—1048
[4]  Park J H, Matzner E. Detrial control on the release of dissolved organic nitrogen (DON) and dissolved inorganic (DIN) from the forest floor under chronic N deposition [J]. Environ Pollut, 2006, 143:178—185
[5]  杨绒,严德翼,周建斌,等.黄土区不同类型土壤可溶性有机氮的含量及特性[J].生态学报,2007, 27(4): 1397—1403
[6]  Cookson W R, Murphy D V. Quantifying the contribution of dissolved organic matter to soil nitrogen cycling using 15N isotopic pool dilution [J]. Soil Biol Biochem, 2004, 36:2097—2100
[7]  Brookshire E N J, Valett H M, Thomas S A, et al. Atmospheric N deposition increases organic N loss from temperate forests [J].Ecosystems, 2007, 10: 252—262
[8]  Pellerin B A, Kausha S S, McDowell W H. Does anthropogenic nitrogen enrichment increase organic nitrogen concentrations in runoff from forested and human-dominated watersheds[J]? Ecosystems, 2006, 9: 852—864
[9]  Perakis S S, Hedin L O. Nitrogen loss from unpolluted South American forests mainly via dissolved organic compound [J]. Nature, 2002, 415:416—419
[10]  Fang Y T, Zhu W X, Gundersen P, et al. Large loss of dissolved organic nitrogen from nitrogen-saturated forests in subtropical China [J]. Ecosystems, 2009, 12: 33—45
[11]  Zhao X, Xie Y X, Xiong Z Q, et al. Nitrogen fate and environmental consequence in paddy soil under rice-wheat rotation in the Taihu lake region, China [J]. Plant Soil, 2009, 319: 225—234
[12]  郭景恒, 张晓山, 蒋春来,等. 酸性森林土壤中Ali/(Ca+Mg)摩尔比值的分布特征及影响因素[J]. 应用生态学报, 2006, 17(7): 1207—1202
[13]  Asano Y, Compton J E, Church M R. Hydrological flow paths influence inorganic and organic nutrient leaching in forest soil [J]. Biogeochemistry, 2006, 81:191—204
[14]  Blodau C, Basiliko N, Mayer B, et al. The fate of experimentally deposited nitrogen in mesocosms from two Canadian peat lands [J]. Sci Total Environ, 2006, 364: 215—228
[15]  Davidson E D, Chorover J, Bryandall D. A mechanism of abiotic immobilization of nitrate in forest ecosystems: the ferrous wheel hypothesis [J]. Global Change Biol, 2003, 9:228—236
[16]  Dail B D, Davidson E A, Chorover J. Rapid abiotic transformation of nitrate in an acid forest soil [J]. Biogeochemistry, 2001, 54: 131—146

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