摘要
[目的]为了探究广西钦州湾红树林湿地土壤有机碳密度的分布特征及土壤理化性质的影响程度.[方法]采集茅尾海红树林自然保护区内不同类型红树林群落0～ 50 cm湿地土壤剖面样品,测定土壤的有机碳密度、pH、容重、粒度组成、总氮、总磷等指标,并且进行相关性分析.[结果]红树林群落0～50 cm平均土壤有机碳密度从大到小排列顺序依次为混交林＞桐花＞光滩,光滩、桐花、混交林群落样地的有机碳密度平均值分别为9.44、9.45、28.60 t/hm^2;土壤有机碳密度与粒度组成、pH、总磷呈极显著相关,其中与土壤黏粒含量、粉粒含量、pH和总磷含量呈极显著负相关,与土壤砂粒含量呈极显著正相关,而与容重、总氮呈不显著正相关.[结论]在钦州湾红树林湿地中,0 ～ 50 cm土壤剖面的平均土壤有机碳密度混交林大于桐花树和光滩,差异极显著.红树林湿地土壤有机碳密度与土壤粒度组成、pH、总磷呈极显著相关,与容重、总氮呈相关性不显著.
[ Objective ] The research aimed to discuss the distribution of soil organic carbon density and the influence of soil physical and chemi- cal propelties of mangrove wetland in Qinzhou Bay of Guangxi. [ Method] Soil profile samples （0 -50 era） of different mangrove community wet- land in Maoweihai Mangrove Nature Reserve were collected. Soil organic carbon density as well as physical and chemical properties including pH, bulk density, particle size composition, total nitrogen content and total phosphorus content were analyzed. And the correlation analysis was con- dueted. [ Result ] The order of average organic carbon density in mangrove wetland soil （0 -50 em） was mixed species 〉 Aegiceras corniculatum 〉 bare flat. The average soil organic carbon density of bare flat, Aegiceras corrdculatum and mixed species were 9.44, 9.45, 28.60 t/hm2, respec- tively. The soil organic carbon density had a high significant correlation with soil particle composition, pH and total phosphorus content. The soil organic carbon density had a high significant negative correlation with clay particle content,silt particle content, pH and total phosphorus content, and had a high significant positive correlation with sand particle composition, while had no significant positive correlation with soil butk density and total nitrogen content. [ Conclusion] The average organic carbon density of soil profile of mangrove wetland in Qinzhou Bay was analyzed. The soil organic carbon density of mixed species was significantly higher than that of Aegiceroz corn/cu/atura and bare fiat. The soil organic carbon den- sity had a high significant correlation with particle composition, pH and total phosphorus content, while had no significant correlation with bulk density and total nitrogen content.
出处
《安徽农业科学》
CAS
2015年第17期120-123,240,共5页
Journal of Anhui Agricultural Sciences
基金
广西自然科学基金项目(2011jj A50016)
广西红树林保护重点实验室开放基金项目(GKLMC-201208)
北部湾环境演变与资源利用教育部重点实验室开放基金项目(BBG1110)
国家自然科学基金项目(41361023)
广西师范学院博士研究人员启动基金项目
关键词
土壤有机碳
土壤理化性质
相关性分析
红树林湿地
广西钦州湾
Soil organic carbon
Soil physical and chemical property
Correlation analysis
Mangrove wetland
Qinzhou Bay of Guangxi
