安徽农业科学2025，Vol.53Issue(14)：22-28,32,8.DOI:10.3969/j.issn.0517-6611.2025.14.004
不同产能烟田中烤烟根系形态差异及其与生物量和养分吸收之间的关联性
Root Morphological Differences of Tobacco Plants in Different Productivity Fields and Their Associations with Biomass and Nutrient Uptake
摘要
Abstract
[Objective]To reveal the root functional traits of tobaccos in different productivity fields of Hengyang tobacco-growing area and their associations with root productivity.This study is expected to provide scientific guidance for strengthening tobacco-leaf yield of the low-pro-ductivity fields in Hunan and even the whole country.[Method]The tobacco roots were collected from 30 fields of low-(10 fields),medium-(10 fields),and high-yielding(10 fields)in Hengyang.The structure,activity,biomass,and nutrient accumulation of the roots were meas-ured,and the relationships among them were analyzed.[Result]The results showed that the average root biomass of tobacco plants in high-yielding fields was 95.16 g/plant,which was significantly higher than that in medium-(81.74 g/plant)and low-yielding fields(75.09 g/plant).The average nitrogen(N)and phosphorus(P)accumulation of tobacco roots in high-yielding fields was 2.51 and 0.54 g/plant,respectively,and was significantly higher than that in middle-yielding fields(1.66 and 0.27 g/plant).Meanwhile,the average potassium accumulation of the tobacco roots in high-yielding fields(4.54 g/plant)was also significantly higher than that in low-yielding fields(3.32 g/plant).The root length,surface area,volume,connection degree,number of nodes,and number of root tips in high-yielding fields were significantly higher than those in low-yielding fields.Redundancy analysis showed that there were significant differences in root structure among the high-,medium-,and low-yielding fields,and this difference further led to differences in root biomass and nutrient accumulation.In high-yielding field,root biomass was significantly correlated with root pixel area,projected area,and others,as well as the root P accumula-tion was significantly correlated with root activity(P＜0.05);in middle-yielding fields,root biomass was significantly correlated with root pixel area and fractal dimension,and root N accumulation was significantly correlated with root activity(P＜0.05);in low-yielding field,root bio-mass was significantly correlated with pixel area,volume,surface area,and root activity(P＜0.05).[Conclusion]Relatively poor root mor-phology,such as shorter root length,smaller root surface area,and less root connectivity,may be the key factors restricting the yield improve-ment of low-yielding tobacco field,and meanwhile,cultivating a good root system is conducive to improving tobacco yield.关键词
衡阳烟区/不同产能烟田/根系构型/根系活力/根系生产力Key words
Hengyang tobacco-growing areas/Fields with different tobacco-yield/Root structure/Root activity/Root productivity分类
农业科技引用本文复制引用
肖孟宇,朱睿彬,李俊儒,马云明,母婷婷,肖亦雄,廖超林,罗功文..不同产能烟田中烤烟根系形态差异及其与生物量和养分吸收之间的关联性[J].安徽农业科学,2025,53(14):22-28,32,8.基金项目
湖南省烟草公司衡阳市公司项目(2024430481240017) （2024430481240017）
湖南省自然科学基金项目(2024JJ6250) （2024JJ6250）
国家自然科学基金项目(42107262). （42107262）
