| 纳帕海湿地不同退化状态下土壤氮素的分异特征 |
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| 引用本文： | 胡金明,董云霞,袁寒,李杰,马彬斌.纳帕海湿地不同退化状态下土壤氮素的分异特征[J].土壤通报,2012(3):690-695. |
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| 作者姓名： | 胡金明 董云霞 袁寒 李杰 马彬斌 |
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| 作者单位： | 云南大学亚洲国际河流中心;红河学院生命科学与技术学院 |
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| 基金项目： | 国家自然科学基金项目(40961003);云南省社发科技项目(2008CA00602);国家科技基础性工作专项(2008FY110300)资助 |
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| 摘 要： | 纳帕海湿地区4类主要土壤的退化程度由高而低为弃耕地-中生草甸土(AFMMS)、中生草甸土(MMS)、湿草甸土(WMS)和沼泽土(MS),对4类土壤0~10 cm、10~20 cm、20~30 cm采样,分析全氮(TN)、速效氮(RAN)、溶解有机氮(DON)、无机氮(IN)含量。结果表明:在剖面垂向,沼泽土TN和RAN含量中上层相对富集,而DON和IN含量由上而下逐渐降低、上层相对富集;其它三类土壤氮素含量总体由上而下降低、上层相对富集;4类土壤间,上层氮素含量为AFMMS
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| 关 键 词： | 纳帕海湿地 湿地退化 土壤 氮素分异 |
Variation of Soil Nitrogen Components under different degradation condition in Napahai wetland reserve |
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| HU Jin-ming,DONG Yun-xia,YUAN Han,LI Jie,MA Bin-bin.Variation of Soil Nitrogen Components under different degradation condition in Napahai wetland reserve[J].Chinese Journal of Soil Science,2012(3):690-695. |
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| Authors: | HU Jin-ming DONG Yun-xia YUAN Han LI Jie MA Bin-bin |
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| Institution: | 1(1.Asian International Rivers Center;Yunnan University,Kunming 650091,China; 2.College of Life Science and Technology,Honghe University,Mengzi 661100,China) |
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| Abstract: | There are 4 soil types of in Napahai wetland reserve,northwest Yunnan-Abandoned Farmland Mesophytic Meadow Soil(AFMMS),Mesophytic Meadow Soil(MMS),Wet Meadow Soil(WMS),and Marsh Soil(MS),correspondingly their degradation degrees from high to low.Contents of Total N(TN),Rapid Available N(RAN),Dissolved Organic N(DON) and Inorganic N(IN) at 3 layers(1st 0 ~ 10 cm,2nd 10 ~ 20 cm,3rd 20 ~ 30 cm) were analyzed for these 4 types of soils.Results showed that: ① From up to down in the soil profiles,contents of N components of AFMMS,MMS and WMS decreased gradually,but relatively concentrated in the 1st layer.The orders of the TN and RAN contents of MS were the 2nd layer > the 1st layer >> the 3rd layer,which indicated relative enrichment in the 1st and 2nd layers;but the contents of DON and IN of MS decreased downwards and relatively enriched in the 1st layer.Both DON and IN accounted for very low percentages of RAN of the 4 types of soils.② Among 4 soils,the contents of N components in the 1st layer showed significant variation as AFMMS < MMS < WMS < MS,but no obvious variation in the 2nd and 3rd layers(except the layers of MS).The significant variation of N components in the 1st layers among 4 soils revealed the effects of human disturbances within the wetland region.③ The corresponding relationship between the variation of N components in the 1st layers and the soil moisture condition among 4 soils showed,wetland becoming dry would accelerate the loss of soil N components in the wetland.Regulating measures should be taken to control further wetland drying in future Napahai conservation and management. |
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| Keywords: | Napahai wetland Wetland degradation Soil N component variation |
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