中国水稻科学2025，Vol.39Issue(3)：387-398,12.DOI:10.16819/j.1001-7216.2025.240507
基肥氮素类型对再生稻生长、产量和氮素利用率的影响
Effects of Nitrogen Type of Basal Fertilizer on Growth,Grain Yield and Nitrogen Use Efficiency of Ratooning Rice
摘要
Abstract
[Objective]This study investigated the effects of different nitrogen types of basal fertilizer on root function,photosynthetic capacity,nitrogen metabolism enzyme activity,grain yield,and nitrogen use efficiency of ratooning rice,aiming to provide a theoretical basis for high-yield and efficient production of ratooning rice in the Jianghan Plain.[Method]A two-year field experiment(2020-2021)was conducted at the Experimental Station of Yangtze University in Jingzhou City,Hubei Province.Four basal fertilizer treatments were applied:no nitrogen application(N0),urea(CK),50%controlled release urea+50%urea(T1),and 50%livestock manure organic fertilizer+50%urea(T2).The N0 treatment received no nitrogen throughout the rice growth season,while other fertilization periods maintained consistent nitrogen types and amounts across CK,T1,and T2.Root dry weight,root activity,leaf area index(LAI),and net photosynthetic rate(Pn)were measured at critical growth stages.Activities of nitrogen metabolism enzymes were determined at heading stages of both main and ratooning seasons.Yield components and nitrogen use efficiency parameters were analyzed.[Result]The T2 treatment exhibited the highest root dry weight,root activity,LAI,and Pn.Activities of nitrogen metabolism enzymes and yields for both seasons followed the order:T2>T1>CK>N0.Compared with N0,total rice yield increased by 75.13%,97.37%,and 137.86%under CK,T1,and T2 treatments,respectively.Relative to CK,T1 and T2 significantly improved grains per panicle,seed-setting rate,and 1000-grain weight.Nitrogen recovery efficiency,agronomic nitrogen use efficiency,and partial factor productivity of nitrogen ranked as T2>T1>CK.[Conclusion]Replacing 50%conventional urea with livestock manure organic fertilizer as base fertilizer enhanced root function,photosynthetic capacity,and nitrogen metabolism enzyme activities,resulting in the highest yield and nitrogen use efficiency.This strategy represents an optimal nitrogen management approach for ratooning rice production in the Jianghan Plain.关键词
根活力/净光合速率/氮代谢酶/再生稻/氮素利用效率Key words
root activity/net photosynthetic rate/nitrogen metabolism enzyme/ratooning rice/nitrogen utilization efficiency引用本文复制引用
张海维,顾欣怡,陈明帅,李福康,施玥丞,杨挺,姜硕琛..基肥氮素类型对再生稻生长、产量和氮素利用率的影响[J].中国水稻科学,2025,39(3):387-398,12.基金项目
国家自然科学基金区域联合基金重点项目(U21A2039). （U21A2039）
