三峡大学主要绿地肥力调查和分析

城市绿地是城市生态系统的重要组成部分，对城市的可持续发展具有重要意义．大学校园是一个较特殊的城市生态系统，调查研究大学校园的主要绿地土壤肥力，对校园生态系统的可持续发展同样具有重要意义．本文通过采集三峡大学主要绿地表层（0～20cm）土壤，分别测定其pH值、阳离子交换量、有机质、全氮、全磷和有效磷等指标，调查三峡大学主要绿地土壤的肥力状况．结果表明：校区绿地表层土壤pH值以中性和碱性为主；有机质、全磷和有效磷含量则处于中上等水平，且有一定的保肥能力；但全氮含量处于很低水平．因此建议对校区绿地施用适量的氮肥，并提出了加强三峡大学校园绿地土壤科学管理的一些措施．

Investigation and Analysis of Soil Fertility of Main Greenbelts in Campus of China Three Gorges University

Urban green space is an important component of urban ecosystems and has great significance for urban sustainability. University campus is a relatively unique urban ecosystem. Investigating soil fertility of the main greenbelts in campus, it is also of great significance to the sustainable development of the campus ecosystems. Soil samples with 0--20 cm depths of greenbelts were collected at campus in China Three Gorges University. And soil pH, CEC, organic matter, N, P, and available P were studied. The results indicate that the surface soil （0--20 cm） of main greenbelts was dominated by neutrality and alkaline; soil organic matter, total P and soil available P, were medium or over medium. Average CEC was high which indicated that the green soils in campus have certain fertilizer retaining capacity. However, the green soils in campus are seriously lack of soil nitrogen; it must be supplemented by application of nitrogen fertilizers. And to strengthen soil fertility of the greenbelts in campus of China Three Gorges University. Finally, some scientific management measures and recommendations are proposed.