| 滇西北纳帕海湿地区域土壤速效氮组分的分异及指示意义 |
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| 引用本文： | 胡金明,袁寒,李杰,董云霞,马彬斌.滇西北纳帕海湿地区域土壤速效氮组分的分异及指示意义[J].山地学报,2011,29(3). |
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| 作者姓名： | 胡金明 袁寒 李杰 董云霞 马彬斌 |
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| 作者单位： | 云南大学,亚洲国际河流中心,云南,昆明,650091 |
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| 基金项目： | 国家自然科学基金项目，云南省社会发展科技计划项目 |
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| 摘 要： | 对纳帕海湿地区的弃耕地-中生草甸土(AFMMS)、中生草甸土(MMS)、湿草甸土(WMS)和沼泽土(MS)的0～10 cm、10～20 cm、20～30 cm层位采样,分析各层土壤速效氮(RAN)、溶解有机氮(DbN)、铵态氮(NH4+-N)、硝态氮(N0,-N)含量.发现:本区4类土壤中,沼泽土各层速效氮素组分含量都显著高于其他3类土壤对应层的含量.4类土壤上层均为RAN和DON的主要分布层,且两者在上层的分异都为AFMMSMMS>WMS>MS,而上中层DON/IN分异为AFMMS>WMS>MMS>MS.这一研究表明,水分和植被生态分异对该湿地区土壤速效氮素组分分异具有重要影响;测得的3类速效氮素组分占RAN的比例极低,土壤中大量的易分(水)解有机氮尚待加强研究;相较于较低比例的无机氮而言,土壤中可被有效利用和易随水分运移发生流失的DON具有更重要的氮素供应和环境指示意义,湿地旱化会增加土壤DON的相对比例从而可能加剧土壤DON的流失,应加强流域中上游湿地土壤的DON动态变化研究.
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| 关 键 词： | 湿地 土壤 速效氮组分 分异 指示意义 纳帕海 |
Variation of Soil Rapid Available Nitrogen Components and Its Implication in Napahai Lake-Marsh Region,Northwest Yunnan Mountain |
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| HU Jinming,YUAN Han,LI Jie,DONG Yunxia,MA Binbin.Variation of Soil Rapid Available Nitrogen Components and Its Implication in Napahai Lake-Marsh Region,Northwest Yunnan Mountain[J].Journal of Mountain Research,2011,29(3). |
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| Authors: | HU Jinming YUAN Han LI Jie DONG Yunxia MA Binbin |
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| Institution: | HU Jinming,YUAN Han,LI Jie,DONG Yunxia,MA Binbin(Asian International Rivers Center,Yunnan University,Kunming 650091,China) |
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| Abstract: | Contents of Rapid Available N(RAN),Dissolved Organic N(DON),Ammonium N and Nitrate N at 3 layers(1st 0-10 cm,2nd 10-20 cm,3rd 20-30 cm) were analyzed for the 4 soil types:Abandoned Farmland Mesophytic Meadow Soil(AFMMS),Mesophytic Meadow Soil(MMS),Wet Meadow Soil(WMS),and Marsh Soil(MS) in Napahai reserve,northwest Yunnan,China.It showed: RAN and 3 components at each layer of MS were significantly higher than those at corresponding layers of other 3 soils.RAN and DON were mainly distributed at the 1st layer... |
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| Keywords: | wetland soil rapid available N component variation implication Napahai |
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