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亚热带稻田弃耕湿地土壤因子对植物群落结构的影响
引用本文:彭亿,李裕元,李忠武,叶芳毅,潘春翔,谢小立.亚热带稻田弃耕湿地土壤因子对植物群落结构的影响[J].应用生态学报,2009,20(7):1543-1550.
作者姓名:彭亿  李裕元  李忠武  叶芳毅  潘春翔  谢小立
作者单位:1. 中国科学院亚热带农业生态研究所桃源农业生态试验站,长沙,410012;湖南大学环境科学与工程学院,长沙,410082
2. 中国科学院亚热带农业生态研究所桃源农业生态试验站,长沙,410012
3. 湖南大学环境科学与工程学院,长沙,410082
基金项目:中国科学院知识创新工程领域前沿项目,国家高技术研究发展计划(863计划),国家科技支撑计划
摘    要:采用冗余分析法对弃耕一年稻田湿地生态系统的植物群落与土壤因子进行了分析.结果表明:在亚热带湿地生态系统中,土壤水分条件、有效钾、有效磷和pH是影响物种分布的最主要土壤因子.试验区的主要植物物种可以划分为3个物种组:丁香蓼-水竹叶物种组(组1)、牛鞭草-圆叶节节菜-稻槎菜物种组(组2)和小白酒草-辣蓼-双穗雀稗物种组(组3).其中,组1主要分布于土壤有效钾含量较高的区域;组2主要分布于阶段性淹水区域;组3主要分布于排水区域,且与土壤有效磷和pH呈正相关.物种多样性与土壤pH、植被地上生物量与土壤全钾含量呈显著正相关,均匀度与土壤有效氮含量呈显著负相关,与其他指标的相关性均不显著.

关 键 词:土壤因子  植物群落结构  冗余分析(RDA)  弃耕湿地
收稿时间:2008-11-24

Effects of soil factors on vegetation community structure in an abandoned subtropical paddy wetland
PENG Yi,LI Yu-yuan,LI Zhong-wu,YE Fang-yi,PAN Chun-xiang,XIE Xiao-li.Effects of soil factors on vegetation community structure in an abandoned subtropical paddy wetland[J].Chinese Journal of Applied Ecology,2009,20(7):1543-1550.
Authors:PENG Yi  LI Yu-yuan  LI Zhong-wu  YE Fang-yi  PAN Chun-xiang  XIE Xiao-li
Institution:Taoyuan Agro-ecological Experimental Station, Institute of Subtropical Agroecology, Chinese Academy of Sciences, Changsha 410125, China;College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Abstract:Based on the investigation data from a subtropical wetland having been abandoned from paddy agriculture for one year, a redundancy analysis was conducted on the relationships between vegetation community and soil factors in the wetland. It was found that soil moisture regime, available K and P, and pH were the main factors affecting the distribution of plant species. The common plant species could be classified into three groups, i.e., Ludwigia prostrata-Murdannia triquetra group (G1), Hemarthria altissima-Rotala rotundifolia-Lapsana apogonoides group (G2), and Conyza canadensis-Polygonum hydropiper-Paspalum pasaloides group (G3). G1 mainly distributed on the soils with higher available K, G2 mainly distributed in periodically flooded area, while G3 mainly distributed in drainage area and was positively correlated to soil available P and pH. Species diversity and above-ground biomass had significant positive correlations with soil pH and total K, respectively, while evenness index was significantly negatively correlated with soil available N. No significant correlations were observed among other indices.
Keywords:soil factor  vegetation community structure  redundancy analysis (RDA)  abandoned wetland  
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