龙脊梯田景区干湿季节下多层级地表径流氮、磷元素变化特征研究  

Study on the Variation Characteristics of Nitrogen and PhosphorusElements in Multi-level Surface Runoff in Longji Terrace Scenic Spot during Dry and Wet Seasons

作　　者：徐德兰 王凯杰 朱学莲 郑文俊 XU Delan;WANG Kaijie;ZHU Xuelian;ZHENG Wenjun(College of Tourism and Landscape Architecture, Guilin University of Technology, Guilin 541004;School of Plant and Ecological Engineering, Guilin University of Technology, Guilin 541004;Guangxi Tourism Industry Research Institute, Guilin 541004)

机构地区：[1]桂林理工大学旅游与风景园林学院,桂林541004 [2]桂林理工大学植物与生态工程学院,桂林541004 [3]广西旅游产业研究院,桂林541004

出　　处：《北京建筑大学学报》2022年第3期57-66,共10页Journal of Beijing University of Civil Engineering and Architecture

基　　金：桂林市科技开发重大专项(20180102-2)。

摘　　要：氮、磷元素是植物生长的必要元素,也是流域水生态系统内源负荷重要的影响因子。为探讨龙脊梯田景区氮、磷元素在干湿季节条件下迁移规律,对960~800 m、800~680 m、680~550 m、550~400 m、400~210 m自上而下5个层级水质总氮、总磷、氨氮、硝态氮变化规律进行研究,结果表明:龙脊梯田景区多层级地表径流氮、磷元素浓度在干湿季下差异不显著(p≥0.01),氨氮和总磷两者浓度都较低;总氮和硝态氮浓度湿季低于干季;但总氮、硝态氮浓度在800~680 m第2层级上达到最高。在200~800 m海拔总氮、氨氮、硝态氮浓度随海拔高度成正比且位于村落和农田密集区;进而说明,干湿季降水量变化和村落、农田的密集程度是影响龙脊梯田景区流域水质中氮、磷元素浓度变化迁移路径及其流失特征的主要原因,需要加强对景区村落和农田氮素污染的防控。Nitrogen and phosphorus are essential elements for plant growth,and they are also important factors influencing the endogenous load of the water ecosystem in the basin.In order to explore the migration law of nitrogen and phosphorus elements in the Longji terraced field under dry and wet seasons,for 960~800 m,800~680 m,680~550 m,550~400 m and 460~210 m,the 5 changes of total nitrogen,total phosphorus,ammonia nitrogen,and nitrate nitrogen in different levels of water quality have been studied from top to bottom,and the results show that the multi-level surface runoff nitrogen and phosphorus element concentrations are not significantly different in the dry and wet seasons(p≥0.01),and the concentrations of ammonia nitrogen and total phosphorus are both low;total nitrogen and nitrate concentration of nitrogen in the wet season is lower than that in the dry season;however,the concentration of total nitrogen and nitrate nitrogen reach the highest at the second level of 800~680 m.The total nitrogen,ammonia nitrogen,and nitrate nitrogen concentrations between 200~800 m altitude are proportional to the altitude and are located in densely populated villages and farmland areas.Furthermore,the precipitation change in the dry and wet seasons and the density of villages and farmland are the main reasons affecting the change,migration path and loss characteristics of nitrogen concentration in the water quality of the Longji Terrace Scenic Area.It is necessary to strengthen the control of the nitrogen pollution in the scenic villages and farmland.

关 键 词：龙脊梯田景区 干湿季 氮、磷 多层级 地表径流 

分 类 号：X522[环境科学与工程—环境工程]