设为首页  |   加入收藏
雷学明,段洪浪,刘文飞,纪宇皝,周际海,吴建平,樊后保.鄱阳湖湿地碟形湖泊沿高程梯度土壤养分及化学计量研究[J].土壤,2017,49(1):40-48. LEI Xueming, DUAN Honglang, LIU Wenfei, JI Yuhuang, ZHOU Jihai, WU Jianping and FAN Houbao.Soil Nutrients and Stoichiometry Along Elevation Gradients in Shallow-lakes of Poyang Lake Wetland[J].Soils,2017,49(1):40-48 本文二维码信息
二维码(扫一下试试看!)
鄱阳湖湿地碟形湖泊沿高程梯度土壤养分及化学计量研究
Soil Nutrients and Stoichiometry Along Elevation Gradients in Shallow-lakes of Poyang Lake Wetland
投稿时间: 2016-04-22  最后修改时间: 2016-07-21
DOI:10.13758/j.cnki.tr.2017.01.007
中文关键词:  鄱阳湖  南矶山湿地  土壤养分  化学计量比  高程梯度  碟形湖
Key Words:Poyang Lake  Nanjishan wetlands  Soil nutrients  Stoichiometric ratio  Elevation gradients  Shallow-lakes
基金项目:国家自然科学基金项目(31570444、31360175)和江西省科技厅项目(20161BBH80049、GJJ151097)资助。
作者单位E-mail
雷学明 南昌工程学院生态与环境科学研究所 leixm0505@163.com 
段洪浪 南昌工程学院生态与环境科学研究所  
刘文飞 南昌工程学院生态与环境科学研究所  
纪宇皝 福建师范大学地理科学学院  
周际海 南昌工程学院生态与环境科学研究所  
吴建平 南昌工程学院生态与环境科学研究所  
樊后保 南昌工程学院生态与环境科学研究所 hbfan@nit.edu.cn 
摘要点击次数: 77
全文下载次数: 70
中文摘要:
      在鄱阳湖南矶山湿地自然保护区的碟形湖区,沿高程梯度采集岗地、高滩、低滩和泥沼土壤,对碳、氮、磷及其化学计量特征进行了研究。结果表明,表层土壤(0 ~ 10 cm)有机碳含量在岗地土壤含最低;总氮和总磷含量均表现为岗地>高滩>低滩>泥沼,且总氮和总磷含量呈显著正相关。土壤有机碳和总氮含量均表现出随土层加深而减少的趋势。表层土壤C/N、C/P和N/P的平均值分别为11.17、52.74和5.03,且随着高程梯度和湖泊的变化,C/N保持相对稳定,而C/P和N/P的变化较大。铵态氮含量表现出岗地<高滩<低滩<泥沼,硝态氮含量表现出高滩<低滩<岗地<泥沼。有效磷与总磷含量呈极显著正相关。总之,受到鄱阳湖季节周期性水文变化的影响,研究区湿地土壤养分有较大差异,其中氮是N/P比的主要控制因子。
Abstract:
      Four types of wetland habitats, i.e. downland, high beach, low beach and swamp, were chosen as elevation gradients in 4 shallow - lakes in Nanjishan wetland nature reserve of Poyang Lake and the contents of soil C, N and P contents and their stoichiometry along the 4 elevation gradients were determined. The results showed that SOC content in 0-10 cm soil layer was lowest in the downland, TN and TP contents were ranked as downland >high beach > low beach > swamp, TN was positively correlated with TP content, SOC and TN contents were decreased with the depth of soil layer, mean ratios of C/N, C/P and N/P were 11.17, 52.74 and 5.03, respectively. In the study area, soil C/N was relatively stable, while C/P and N/P varied substantially either along elevation gradients or among shallow-lakes. NH4+-N content was ranked as downland < high beach < low beach < swamp, while NO3-N content was ranked as high beach < low beach < downland < swamp. Furthermore, AP and TP contents were positively correlated. In short, soil nutrients in the study area exhibits large variations due to the seasonal dynamics of hydrology in Poyang Lake and TN was the primary limiting factor of N/P ratio.
查看全文  查看/发表评论  下载PDF阅读器

您是第626447位访问者
版权所有 © 《土壤》编辑部
本系统由北京勤云科技发展有限公司设计   京ICP备09084417号
手机扫一扫看