中国麻业科学2025，Vol.47Issue(1)：53-62,10.
施氮量及追肥时期对苎麻生长生理和纤维产量的影响
Effects of Different Nitrogen Treatments and Its Application Periods on the Growth,Physiology and Fiber Yield of Ramie
摘要
Abstract
To investigate the effects of different nitrogen application rates and topdressing periods on ramie growth and yield,using Zhongzhu No.2 as the experimental material,four nitrogen application rates were set:no nitrogen fertilizer(N0),30%nitrogen reduction(N1,273 kg/hm2),15%nitrogen reduction(N2,332 kg/hm2),and conventional nitrogen fertilizer(N3,390 kg/hm2).For nitrogen treatments,60%of nitrogen fertilizer was applied as basal application,and the remaining 40%was top-dressed at one time,with two topdressing periods:canopy closure stage(a)and vigorous growth stage(b).Using conventional fertilization scheme N3-a as control,the effects of different nitrogen treatments on ramie growth,physiology,and fiber yield were analyzed.The study showed that compared with con-ventional nitrogen application rate,nitrogen reduction had smaller impacts on ramie leaf area index and SPAD values,while promoting agronomic traits,photosynthetic indicators,and nitrogen metabolism en-zyme activities.Under 15%nitrogen reduction treatment,the annual fiber yield differed by only 19.37 kg/hm2 compared with conventional nitrogen treatment.Moreover,under the same nitrogen appli-cation rate,the ramie yield of treatments topdressing at canopy closure stage was significantly better than that at vigorous growth stage.Reducing 15%nitrogen fertilizer based on conventional application rate combined with topdressing at canopy closure stage(N2-a)serves as the reference fertilization scheme for Zhongzhu No.2 cultivation in this study,which is conducive to achieving high yield and quality cultiva-tion.关键词
苎麻/氮肥/农艺性状/生理/纤维产量Key words
ramie/nitrogenous fertilizer/agronomic traits/physiology/fiber yield分类
农业科学引用本文复制引用
李茜,管圣,许明志,陈建福,卢建宁,荣晶,王立琦,佘玮..施氮量及追肥时期对苎麻生长生理和纤维产量的影响[J].中国麻业科学,2025,47(1):53-62,10.基金项目
财政部和农业农村部:国家麻类产业技术体系(CARS-16-E11) （CARS-16-E11）
湖南省教育厅重点项目(23A0178) （23A0178）
