江西农业学报2025，Vol.37Issue(10)：56-61,6.DOI:10.19386/j.cnki.jxnyxb.2025.10.008
连作植烟土壤的硬度变化特征及其对烟叶经济性状的影响
Variation Characteristics of Tobacco Soil Hardness under Continuous Cropping and Its Impact on Economic Traits of Tobacco Leaves
摘要
Abstract
This study was conducted in major tobacco-growing areas of Sichuan Province,where soil samples were collected from 296 fields.The mechanisms of continuous cropping duration on soil hardness and its key influencing factors were systematically analyzed,and the effects of soil hardness on tobacco leaf economic traits were explored.The results showed that with the increase of continuous cropping duration,soil hardness significantly increased.The soil hardness in fields with 16～20 years of continuous cropping was approximately 27.02%higher than that in fields without continuous cropping.Random forest model analysis revealed that the contribution rates of soil large aggregates,bulk density,and alkaline nitrogen to soil hardness were 20.52%,15.46%,and 13.22%,respectively.Mediation effect analysis indicated that continuous cropping duration indirectly aggravated soil hardening through mediation variables such as bulk density,silt,organic matter and alkaline nitrogen,with the positive mediating effect of bulk density being the most significant(path coefficient=0.35).The economic traits of tobacco leaves were the best under low soil hardness.关键词
烟叶连作/土壤硬度/随机森林模型/中介效应/经济性状Key words
Continuous cropping of tobacco/Soil hardness/Random forest model/Mediating effect/Economic trait分类
农业科技引用本文复制引用
杨家伟,王力,廖杨子杰,丁梦娇,戴华鑫,董洪旭,梁太波..连作植烟土壤的硬度变化特征及其对烟叶经济性状的影响[J].江西农业学报,2025,37(10):56-61,6.基金项目
安徽中烟基地基地服务项目(202334000034002) （202334000034002）
中国烟草总公司重点研发项目"植烟土壤健康评价体系构建及应用"(110202102037). （110202102037）
