农业科技与技术（英文）2025，Vol.26Issue(1)：31-44,14.DOI:10.16175/j.cnki.1009-4229.2025.01.005
烟—稻复种土壤的肥力分级——以湘南为例
Soil Fertility Grading in Tobacco—Rice Rotation Areas:A Case Study in Southern Hunan
摘要
Abstract
As a paddy—upland rotation system,tobacco—rice rotation has typical characteristics in the formation and evolution of soil fertility during the tobacco season with dry farming and rice season with water cultivation.To scientifically unveil the soil fertility formation process and grade the soil fertility in tobacco—rice rotation areas,we collected 372 soil samples from 11 tobacco stations(Haotang,Aoquan,Chengjiao,Renyi,Fangyuan,Anping,Huangsha,Taiping,Tushi,Dashiqiao,and Baimangying)in the typical tobacco—rice rotation areas of Chenzhou and Yongzhou in Southern Hunan.The physical,chemical,and biological indicators of the soil samples were measured,and the tobacco and rice yields of each tobacco station were investigated.Machine learning was employed to screen the key indicators influencing the tobacco yield,and a comprehensive numerical analysis method combining principal component analysis and discriminant analysis were adopted to cluster the sampling points,analyze their fertility formation processes,and grade the soil fertility.The results showed that clay content,available phosphorus,plow layer depth,slit-to-clay ratio,total nitrogen,basal respiration,and organic carbon were identified as seven key indicators influencing the tobacco yield.The results of the comprehensive numerical analysis predicted two main processes involved in the formation of soil fertility in tobacco—rice rotation areas.One was the soil maturation process related to soil carbon and nitrogen cycling,and the other was the process of changes in soil physical properties such as clay content and slit-to-clay ratio.According to the established soil fertility grading method for tobacco—rice rotation areas,the soil fertility of 11 tobacco stations was graded.The results showed that the soil fertility was high in Haotang,Aoquan,Renyi,and Dashiqiao,medium in Huangsha and Tushi,and low in Anping,Baimangying,and Taiping.The tobacco and rice yields confirmed that this grading standard can be effectively applied to the grading of soil fertility in the tobacco—rice rotation areas in Southern Hunan and can provide a scientific basis for soil management in tobacco—rice rotation.关键词
烟—稻复种/土壤肥力/机器学习/聚类分析/肥力分级Key words
Tobacco—rice rotation/Soil fertility/Machine learning/Cluster analysis/Soil fertility grading引用本文复制引用
肖子曼,郝汉驰,肖艳松,李小慧,刘勇军,龙坚,侯红波,彭佩钦..烟—稻复种土壤的肥力分级——以湘南为例[J].农业科技与技术（英文）,2025,26(1):31-44,14.基金项目
Supported by Key Research and Development Project of China Tobacco(Zhongyanban[2021]150).中国烟草总公司重点研发项目(中烟办[2021]150号) （Zhongyanban[2021]150）
