长江南京段两岸芦苇群落植物生长状况与土壤理化性质的相关性研究
摘 要
南京作为江苏省省会、长三角及华东唯一特大城市，其城市化进程的加快和江南、江北迥异的发展模式正在日益深刻地影响长江南京段沿江湿地植被的生长状况，长江南京段南岸与北岸拥有相近的水文条件和雨热条件，其沿江湿地植被在不同主导因子干扰下展现出不同生长状况和适生性生态对策。芦苇作为一种适生性强的广布种和乡土植物，占据了本次研究选取的所有样地，因此，本文以长江南岸、北岸湿地公园内自然分布的芦苇群落作为研究对象，采取野外实地踏查及采样的方法采集并统计芦苇群落内的草本及小灌木植物生理因子和土壤理化因子，通过探讨长江南京段两岸芦苇群落植物生理因子及对应土壤理化因子相关性，以及相同因子在南岸、北岸呈现的差异显著性，以揭示长江南京段两岸植被生长限制因子或主导影响因子与两岸不同城市化特征之间的联系。研究结果表明：两岸土壤容重差异和土壤电导率差异共同表征江南研究区土壤的透气性和透水性、保水性较江北研究区更为良好；两岸植物叶绿素含量差异、叶片氮含量差异共同表征江北研究区植物生长状况比江南研究区更良好；南岸研究区植物在生态型上更接近水生或湿生植物，而北岸研究区植物在生态型上更接近中生植物；土壤化学因子pH对江北研究区植物生长状况影响较显著；土壤物理因子土壤均温对江南研究区植物生长状况影响显著，即长江南京段南岸与北岸植物生长状况的干扰因子来源不同。本文可为长江南京段治理沿江湿地土壤污染问题和改善沿江湿地土壤地力水平提供一定的思考方向和理论依据。
关键词：长江南京段；沿江湿地；芦苇群落；植物生理因子；土壤理化因子；
Correlation between plant growth and soil physical and chemical properties of reed communities along the Nanjing section of the Yangtze River
Abstract
As the capital of Jiangsu Province, the Yangtze River Delta and the only megacity in east China, the acceleration of the urbanization process of Nanjing and the different development patterns of Jiangnan and Jiangbei District are increasingly and profoundly affecting the growth of the wetland vegetation along the Nanjing section of the Yangtze River, the South Bank and the North Bank of the Nanjing section of the Yangtze River have similar hydrological and rain-heat conditions, and the vegetation along the Yangtze River shows different growth conditions and ecological strategies under the disturbance of different dominant factors. As a widely distributed and native plant with strong adaptability, reed occupies all the plots selected in this study. Therefore, the natural distribution of reed communities in the wetland parks on the south and north banks of the Yangtze River are studied in this paper, the physiological factors of herbs and small shrubs and soil physical and chemical factors in the community of reed were collected and counted by field investigation and sampling, based on the study of the correlation between plant physiological factors and corresponding soil physical and chemical factors of reed communities along the Nanjing section of the Yangtze River, the differences of the same factors between the South Bank and the North Bank were significant, the purpose of this study is to reveal the relationship between the vegetation growth limiting factors or dominant influencing factors and the different urbanization characteristics. The results showed that the soil permeability, water permeability and water retention of Jiangnan Research area were better than those of Jiangbei Research area The differences of chlorophyll content and leaf nitrogen content between the two sides of the river indicate that the plant growth condition in the research area of Jiangbei is better than that in the research area of Jiangnan, and the plants in the research area of Nanan are closer to aquatic or wet plants in ecotype, the plant ecotypes in the North Bank research area are more similar to the mesophytes, the soil chemical factor pH has a significant effect on the plant growth, the soil physical factor soil mean temperature has a significant effect on the plant growth in the South Bank research area, in other words, the disturbance factors of plant growth were different in the South Bank and the North Bank of Nanjing section of the Yangtze River. This paper can provide some thinking direction and theoretical basis for controlling soil pollution and improving soil fertility of Yangtze River wetland in Nanjing section of Yangtze River.
Key words：Nanjing section of the Yangtze River ; wetland along the Yangtze River ; Reed Community ; plant physiological factors ; soil physical and chemical factors;
资料编号：[260169]
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