叶面喷硒对不同氮水平下寒地水稻氮代谢和产量的影响

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中图分类号：S511 文献标志码：A 文章编号：1672-2043（2025）09-2253-11 doi：10.11654/jaes.2024-0722

Abstract：Toinvestigatetegulationofkenitrogenmetabolismenzeactitisiniceudervaryingnitrogenlevelsandtoeamie theefectsflliaisftoselelsocegothndveot，selleifueeofflalaiof seleniumonricenitrogenuptake，accumulationandyieldunderdiferentnitrogenlevels.Atwo-factorrandompotexperimentwas conductedwith"Kenjing8cevrietysteesarchectadfourrogelevelswerestmelyN（noitrogenapplicati） 75kg⋅hm-2， ） N2（100kg⋅hm-2） 二， N3（125kg⋅hm-2， ，2selenium fertilizer varieties，including Se1（inorganic selenium）and Se2（organic selenium），the concentrations were both 100mg⋅kg-1 ，and 12 varieties were treated with water spray compared with SeO.Results indicate thatN3SeltreatentsigicantlyineasedtrogeotentiallicegasopaedtoNSetreamentOasferading nitrogen content in rice leaves，stems，roots，and panicles increased significantly by 37.69 % ，39.39 % 26.55% ，and 35.23%，respectively. Thiscontributes toicegrowthanddevelopmentaswellasnitrogenuptakeandaccumulationtoacertainextent.Atidenticaltrogen levels，foliarplicatiofdifetsefertilssowdtatStreaetebidignifiatlygeryrogeabolism enzymeactivitiesthanSe2treatment.2Odaysafterheading，theactivitiesofnitratereductase（NR），glutaminesynthetase（GS），and glutamate synthase（GOGAT） in rice leaves increased significantly by 6.39%-43.85% 3.64%-5.97% ，and 1.21%-100.00% ，respectively. Underdiferentnitrogen levels，theN3Sel treatmentyield thehighest rice production，increasingby199.63 % compared to the NOSe1 treatment.Ateaerogenlaate，Seramentsowdsifantyielacingect，cedintStaty （20 4.73% to 22.39% . Underconditions of nitrogen-selenium interaction，rice yield can be enhanced.In summary，exogenousselenium application at diffrent nitrogen levels can influence ricenitrogen metabolism.Specifically，at anitrogen rateof 125kg⋅hm-2 ，inorganic seleniumapliedduringthebotingstagesignificantlyenhancedtheactivityofkeynitrogenmetabolismenzesandincreasedyieldn the‘Kenjing 8’rice variety.

Keywords：selenium;nitrogen fertilizer; rice;coldarea;nitrogenmetabolism

水稻作为全球主要粮食作物之一，其产量约占粮食总产量的 18.1% 。（剩余16809字）