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当前位置: 首页 > 文章 > 长江河口九段沙互花米草湿地生态系统N、P、K的循环特征 生态学杂志 2009,28 (2) 223-230
Position: Home > Articles > Characteristics of N,P and K cycling in Spartina alterniflora wetland ecosystem in Jiuduansha shoal of Yangtze River estuary Chinese Journal of Ecology 2009,28 (2) 223-230

长江河口九段沙互花米草湿地生态系统N、P、K的循环特征

作  者：
杨永兴;刘长娥;杨杨
单  位：
同济大学生命科学与技术学院;同济大学环境科学与工程学院污染控制与资源化国家重点实验室
关键词：
九段沙湿地;互花米草;N、P、K;循环特征
摘  要：
研究了九段沙外来入侵种互花米草(Spartina alterniflora)湿地生态系统的营养元素含量、分布规律与循环特征。结果表明,九段沙的上沙、中沙和下沙互花米草湿地土壤全量养分含量差异相对较小,而速效性养分含量差异相对较大。土壤剖面中TK含量大大高于TN和TP含量,排序为:TK>TN>TP。各沙洲速效性养分含量排序为:速效K>速效N>速效P。土壤速效性养分与全量养分的空间分布规律并不一致,土壤剖面营养元素的垂直分布差异比较明显,速效性养分土壤剖面垂直分异比全量养分显著。各深度土壤营养元素含量均存在差异,不同沙洲同一深度土壤营养元素含量也存在差异。各沙洲不同深度土壤TN含量的差异明显大于TP和TK含量差异。植物中3种营养元素含量以K最高,N其次,P最低。湿地生态系统营养元素归还量远大于存留量。吸收系数排序为:N>P>K。不同沙洲营养元素的利用系数和循环系数存在明显差异,上沙P元素、中沙与下沙K元素利用系数最大,上沙K元素、中沙P元素与下沙N元素循环系数最大。
译  名：
Characteristics of N,P and K cycling in Spartina alterniflora wetland ecosystem in Jiuduansha shoal of Yangtze River estuary
作  者：
YANG Yong-xing1,LIU Chang-e1,2,YANG Yang3(1Key Laboratory of Yangtze River Water Environment,Ministry of Education,State Key Laboratory of Pollution Control and Resources Reuse,College of Environmental Science and Engineering,Shanghai 200092,China;2Institute of Ecological Environment Protection,Shanghai Academy of Agricultural Science,Shanghai 201106,China;3School of Life Science and Technology,Tongji University,Shanghai 200092,China)
关键词：
Jiuduansha shoal wetland;Spartina alterniflora;N,P,K;cycling characteristics
摘  要：
In the upper,middle,and lower shoals of Jiuduansha shoal at Yangztse River estuary,an investigation was made on the content,distribution pattern,and cycling characteristics of nutrient elements N,P and K in invading species Spartina alterniflora wetland ecosystem.The results showed that among the S.alterniflora wetland ecosystems in the three shoals,the contents of soil total N,P,and K had relatively small differences,but those of soil available N,P,and K had larger differences.The total K content in soil profile was far higher than the contents of total N and P,with the order of total K>total N>total P.Soil available nutrient contents in the three shoals were in the order of available K > available N > available P.Soil available N,P,and K had different spatial distribution patterns from soil total N,P,and K,and their vertical differentiation in the profile was more obvious than that of soil total N,P,and K.The contents of N,P,and K at different soil depths in the same shoals or at the same soil depths in different shoals were different,and the difference of total N was obviously larger than that of total P and K.The plant K content was the highest,followed by N,and P.The return of nutrient elements in the wetland ecosystem was far greater than their reserve,and the absorption coefficient was in the order of N>P>K.There existed obvious differences in the utilization coefficient and cycling coefficient of N,P,and K among the three shoals of Jiuduansha shoal.The P in the upper shoal and the K in the middle and lower shoals had the highest utilization coefficient;while the K in the upper shoal,P in the middle shoal,and N in the lower shoal had the highest cycling coefficient.

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