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基于主成分分析的土壤肥力综合指数评价
引用本文:吴玉红,田霄鸿,同延安,南雄雄,周密,侯永辉.基于主成分分析的土壤肥力综合指数评价[J].生态学杂志,2010,29(1):173.
作者姓名:吴玉红  田霄鸿  同延安  南雄雄  周密  侯永辉
作者单位:西北农林科技大学资源环境学院,陕西杨凌,712100
基金项目:国家“十一五”科技支撑计划资助项目(2006BAD05B07、2007BAD89B16、2006BAD25B09)
摘    要:以杨凌为研究区域,选择田块尺度为评价单元,采集27个田块土壤,利用模糊数学中综合指数评价模型进行土壤肥力质量评价。经取样数合理性统计分析,27个样点估计研究区域土壤肥力评价能够满足90%置信水平条件下15%和20%的相对误差取样数的精度需求。运用主成分分析,通过计算变量的Norm值筛选速效钾、碳酸钙、全磷、全氮、土壤有机质、CEC、速效磷、全钾进入土壤肥力评价的最小数据库集(MDS),利用非线性隶属度函数实现评价指标量纲归一化且评价单项肥力指标,利用雷达图直观地反映单因素肥力指标在土壤中的状态以及土壤肥力的整体状况,结果表明,全磷和碳酸钙是影响研究区土壤肥力的限制性因子。研究区域在田块评价尺度上的土壤肥力综合指数范围为0.7~0.8。

关 键 词:主成分分析  最小数据库  隶属度函数  土壤肥力综合指数  

Assessment of integrated soil fertility index based on principal components analysis
WU Yu-hong,TIAN Xiao-hong,TONG Yan-an,NAN Xiong-xiong,ZHOU Mi,HOU Yong-hui.Assessment of integrated soil fertility index based on principal components analysis[J].Chinese Journal of Ecology,2010,29(1):173.
Authors:WU Yu-hong  TIAN Xiao-hong  TONG Yan-an  NAN Xiong-xiong  ZHOU Mi  HOU Yong-hui
Institution:WU Yu-hong,TIAN Xiao-hong,TONG Yan-an,NAN Xiong-xiong,ZHOU Mi,HOU Yong-hui (College of Resource , Environment,Northwest A&F University,Yangling 712100,Shaanxi,China).
Abstract:Taking the Yangling of Shaanxi as a case and selecting field plot scale as the assessment unit, the farmland soil fertility quality was evaluated by using integrated fertility index. According to the statistical analysis for sample number rationality, the regional soil fertility assessment based on 27 sampling sites were sufficient to meet the required accuracy of 15% and 20% relative error under 90% confidence level. The minimum data set components including soil organic matter, total nitrogen, total phosp...
Keywords:principal components analysis (PCA)  minimum data set (MDS)  membership function  integrated soil fertility index    
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