摘要
[目的]运用统计学方法对永泰县土壤养分地球化学综合等级进行评价,最大限度地减少人为主观因素的影响。[方法]对工作区内土壤进行系统采样,送检测试土壤养分大量元素(有机质、碱解氮、有效磷、速效钾、全氮、全磷、全钾)含量及pH,通过采样数据的一般性描述,初步判断工作区内土壤养分元素富集分等情况,随后利用SPSS软件对数据进行标准化处理,建立相关系数矩阵,判断其进行统计学分析的可行性。通过主成分分析计算筛选出评价因子主成分,计算综合评价得分,并利用K-均值聚类分析法将综合得分划分为缺乏、较缺乏、中等、较富集、富集5类。[结果]工作区内土壤养分元素分布不均匀,变异性高,土壤总体呈酸性,富氮缺磷钾。土壤地球化学养分综合状况较差,综合得分属较缺乏、缺乏等级占比达54.68%。[结论]该研究为土壤养分评价提供科学依据。
[Objective]To evaluate the comprehensive geochemical grade of soil nutrients in Yongtai County by using statistical methods,so as to minimize the impact of human subjective factors.[Method]Systematically sample the soil in the working area,the content of soil nutrient macroelements(organic matter,alkali hydrolyzable nitrogen,available phosphorus,available potassium,total nitrogen,total phosphorus,total potassium)and pH were submitted for testing,through the general description of the sampling data,the enrichment and grading of soil nutrient elements in the work area were preliminarily judged.Then,SPSS software was used to standardize the data and establish a correlation coefficient matrix to judge the feasibility of statistical analysis.The principal components of the evaluation factors were selected through principal component analysis,and the comprehensive evaluation scores were calculated.The comprehensive scores were divided into five categories:lack,relatively lack,medium,relatively enriched and enriched by using K-means cluster analysis.[Result]The soil nutrients elements in the working area was uneven distribution,high variability,and the soil was generally acidic,nitrogen enrichment,lack of potassium and phosphorus.The comprehensive nutrient status was poor,the lack and relatively lack of comprehensive level accounted for 54.68%.[Conclusion]This study provides scientific basis for soil nutrient evaluation.
作者
江晓龙
JIANG Xiao-long(Fujian Coalfield Geological Prospecting Institute,Fuzhou,Fujian 350000)
出处
《安徽农业科学》
CAS
2023年第1期68-71,共4页
Journal of Anhui Agricultural Sciences
基金
福建省财政项目(2018001)。
关键词
主成分分析
聚类分析
土壤养分
地球化学
综合评价
永泰县
Principal component analysis
Cluster analysis
Soil nutrients
Geochemistry
Comprehensive evaluation
Yongtai County
