小流域入库河口土壤养分水平空间变异及综合评价.docVIP

小流域入库河口土壤养分水平空间变异及综合评价 　　摘要：以丹江口水库青塘河小流域入库河口37.8 hm2面积的土地为研究对象，利用SPSS 19、ArcGIS10.0及GS+9.0软件研究该区域8种土壤养分的具体空间变异与分布。结果表明，有机质、全磷、全钾、全氮超过95%面积的土壤处于中等及以下水平；从速效养分来看，碱解氮含量较低，速效磷和速效钾含量相对较高，基本处于中等及以上水平；对土壤养分综合指标分析结果显示，贫瘠土壤占整个研究区域面积的70%以上。通过对土壤养分综合状况分析，为库区植被恢复关键技术的研究提供了数据支撑 关键词：土壤养分；空间变异；地统计分析；克里格插值 中图分类号：S158.2 文献标识码：A 文章编号：0439-8114（2016）21-5524-05 DOI：10.14088/j.cnki.issn0439-8114.2016.21.020 Horizontal Spatial Variability and Integrated Evaluation of Soil Nutrients in River Estuary of Small Watershed WANG Hua1，LI Ya-han2 （1.Dongfang College，Zhejiang University of Finance Economics，Jiaxing 314000，Zhejiang，China； 2.Hangzhou Design Institute of Water Conservancy and Hydropower Co.，Ltd.，Hangzhou 310006，China） Abstract：The estuary of Qingtanghe river watershed of Danjiangkou Reservoir was selected as the research region，whose area is 37.8 hm2. The spatial variability and distribution of the soil nutrients in this area were analyzed by using SPSS19.0，ArcGIS10.0 and GS+9.0. The results showed that，the contents of organic matter，TP，TK and TN in more than 95% areas were at the middle or lower level. From the available nutrients，available P and available K were higher than alkaline N，all at the middle or higher level. The results of comprehensive index analysis showed that the barren soil accounted for more than 70% of the total area in the research region. Based on the comprehensive analysis of soil nutrients，the data support for the research of the key technologies of the vegetation restoration in the reservoir area was provided. Key words： soil nutrient； spatial variation； geo-statistical analyst； Kriging interpolation 丹江口水?焓侨?国最大的饮用水源保护地，其安全性对南水北调工程至关重要，要想从根本上保证南水北调中线水源区的水质安全，必须切实加强水源区的生态环境保护。由于丹江口大坝加高工程的影响，形成了新的水陆交错带，使水源地生态环境安全保障成为流域治理亟待解决的首要问题。入库河口是控制外源污染进入水库的最后一道屏障[1]，其植被发挥着拦截污染、吸收水体中营养物、固定岸坡的作用，是影响库区生态环境构建、保障水质安全的关键因素 土壤是植被赖以生存的基础，土壤养分作为土壤肥力的重要属性，其含量的高低直接影响植被的生存状况，正确理解土壤养分的空间变异是优化土壤管理、指导植被恢复的关键。本研究以丹江口库区青塘河小流域入库河口的土壤作为研究对象，利用地统计学与地理信息系统（GI