基于模糊数学法的西藏丁青县土壤肥力综合评价  

Comprehensive Assessment of Soil Fertility in Dingqing County of Tibet Based on Fuzzy Mathematics

作　　者：代迅 DAI Xun(Agricultural Technology Popularization Station of Changdu,Tibet,Changdu,Tibet 854000)

机构地区：[1]西藏昌都市农业技术推广总站,西藏昌都854000

出　　处：《中国农学通报》2024年第19期70-75,共6页Chinese Agricultural Science Bulletin

摘　　要：本研究的目的是通过数学方法对土壤单因素及综合肥力进行评价。选取pH、全氮、全钾、全磷、碱解氮、速效钾8项指标作为评价依据,并采用描述统计法和模糊综合评判模型分别对单因素和综合肥力指标进行分析和评价。结果显示,研究区土壤以碱性或者强碱性土为主,均值pH7.78,变异系数为6.56%,表明土壤酸碱度的稳定性相对较高。土壤氮素及速效钾含量较高,但全钾、全磷及有效磷含量相对较低,有机质含量整体处于中等水平。通过评价模型发现,有机质对综合肥力影响最大,速效钾对综合肥力影响最小。另外,土壤综合肥力的等级分布相对分散,其中一、二等地所占比例为24.49%,三等地为26.02%,而较差的四、五等地占比达到49.49%。本研究成果可以为当地农业生产和土壤管理提供有益参考,根据土壤养分单因素水平及肥力综合水平,制定施肥方案及作物栽培措施。未来研究可以考虑更多因素和指标,进一步完善土壤肥力评价模型,提高评价的准确性和可靠性。To evaluate soil single factor and comprehensive fertility through mathematical method,eight indicators including pH,total nitrogen,total potassium,total phosphorus,alkali hydrolysed nitrogen and available potassium were selected as evaluation criteria.Descriptive statistical method and fuzzy comprehensive evaluation model were used to analyze and evaluate single-factor and comprehensive fertility indicators respectively.The results showed that the soil in the study area was mainly alkaline or strongly alkaline,with a mean pH of 7.78 and a coefficient of variation of 6.56%,indicating relatively high stability of soil acidity and alkalinity.Soil nitrogen and available potassium were relatively high,but total potassium,total phosphorus and available phosphorus were relatively low,and the total organic matter content was moderate.Through the evaluation model,it was found that organic matter had the greatest effect on total fertility,while available potassium had the least effect on total fertility.In addition,the distribution of soil comprehensive fertility levels was relatively scattered,with first and second class land accounting for 24.49%,third class land accounting for 26.02%,and poor fourth and fifth class land accounting for 49.49%.In conclusion,the results of this study could provide useful reference for local agricultural production and soil management.Based on the single-factor level of soil nutrients and the comprehensive level of fertility,fertilization plans and crop management measures could be formulated.Future research should consider more factors and indicators,further improve the soil fertility evaluation model,and improve the accuracy and reliability of the evaluation.

关 键 词：西藏丁青县 土壤肥力 单因素评价 肥力综合评价 模糊综合评判法 

分 类 号：S151.9[农业科学—土壤学]