土壤2026，Vol.58Issue(2)：300-310,11.DOI:10.13758/j.cnki.tr.202503200100
烟田土壤测土施氮方法优化研究
Optimization of Soil Testing for Nitrogen Fertilization in Tobacco Fields
摘要
Abstract
This study focused on tobacco plant,which is highly sensitive to N supply,and utilized various tobacco-growing soils from across the country.Through incubation experiments,pot and field experiments,a soil testing method for N fertilization in tobacco fields was optimized.The results showed that under aerobic conditions,the increase in soil ammonium nitrogen was significantly negatively correlated with pH,while nitrate nitrogen was significantly positively correlated with pH.The increase in total inorganic nitrogen was primarily positively correlated with multiple soil N availability indicators.Both increasing temperature and extending incubation time favored the accumulation of ammonium nitrogen under anaerobic conditions.When accounting for initial nitrate nitrogen lost during anaerobic incubation,the anaerobic and aerobic methods generally reflected consistent soil N supply capacities.Inorganic nitrogen obtained under specific incubation conditions more accurately reflected the N supply capacity of different soils compared to single common N indicators.Using stepwise regression,a formula for tobacco leaf N uptake based on alkali-hydrolyzable nitrogen and inorganic nitrogen was derived:Tobacco leaf N uptake(mg/kg soil)=37+0.3×alkali-hydrolyzable nitrogen+0.7×inorganic nitrogen.This formula outperformed all other single soil N indicators.By comparing with the appropriate field N application rates,a simplified formula for soil testing-based N fertilization in tobacco fields was proposed:Recommended N application rate for tobacco fields(kg/hm2)=135-1.07×soil baseline N supply indicator,where soil baseline N supply indicator=0.3×alkali-hydrolyzable nitrogen+0.7×inorganic nitrogen.This formula is expected to provide an effective methodological basis for future soil testing-based N fertilization in tobacco fields.关键词
植烟土壤/测土施氮方法/碱解氮/无机氮/施氮量Key words
Tobacco-growing soil/Soil testing for nitrogen fertilization/Alkali-hydrolyzable nitrogen/Inorganic nitrogen/Nitrogen application rate分类
农业科技引用本文复制引用
郇威威,周健民,徐勇贤,王力,钱玭,王玉洁,王一柳,陈小琴,卢殿君,王火焰..烟田土壤测土施氮方法优化研究[J].土壤,2026,58(2):300-310,11.基金项目
云南省烟草公司科技计划一般项目(yxyc2024014)和中国烟草总公司河南省公司重点科技项目(2021410000240017)资助. （yxyc2024014）
