施氮量对水稻济软粳1802生长发育及产量的影响

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中图分类号：S511 文献标识码：A DOI编码：10.3969/j.issn.1006—6500.2025.11.003

Effects ofNitrogenApplicationRateon Growth，Developmentand YieldofRice VarietyJiruanjing 1802

（1.LinyiAgiclturalcolgromotionCnterinyiandog6，ina;.TanchngCounturaldstryeot ServiceGroupompanyLimited，Tancheng，handong2761oo，China;3.LanlingAgricultureanduralBureau，Lanling，hadong 277700，China）

Abstract：UsingJruajing8O2stexperienalateral，tisstudyivestigatstefctsofdieentnrogenapcatiote onthepopulationgrowthandyieldofrice.Theexperimentadoptedarandomizedblock design，withsixnitrogenfertilizerlevelsofO， 150，195，240，285，and 330kg⋅hm-2 ，which were denoted as CK，N1，N2，N3，N4，and N5 respectively，AD value，leaf area index headingrate，yieldanditscomponents.Theresultsshowedthat：（1）Nitrogenapplicationratehadasignificantipactontheyieldf Jiruanjing18O2.Yieldincreasedfirstandthendecreasedwiththeincreaseofnitrogenapplicationrate，andreacheditsmaximumyield at N3，with a 19.66% increase compared to CK.Grains per panicle also increased first and then decreased，and peaked at N3.The productivepanicleumbershowedacontinuousincreasingtrend;Theproductiveilerpercentage，seedsetingate，andgain weightshowedacontinuousdecreasingtrendTehighestyieldatN3wasprimarilyatributedtotheincreaseingrainsperanicle;（2） Increasing nitrogenfertilizerapplicationwasbenefcialforincreasingthepopulationtilernumber，othtemaximumandfinalstemtilernumbersereighestatN5;（3）Theaplicationofnitrogenfertlizersignificantlyincreaseddrymateraccumulationinthe abovegroundpartsofice.Attematuritystage，allnitrogenaplicationtreatmentsweresignificantlyhgherthanCK，ndshoweda trendofincreasinfistadtendcreasing，with3eingteighest;（4）Teaplicatioofnitrogenfertilierhadasigicantt onincreasingtheleafSPADvalueandleafareaindex.The SPADvalueshowedacontinuousincreasing trendwiththeincreaseof nitrogenaplicationrate，withdiferencesamongtreatmentsreachedahighlysignificantlevel.Leafareaindexexhibitedacontinuous increasingtrndwithsingnirogenaplicatonrates.Atbththejtingandheadingtages，allrogenapplicationtreamtsere significantlyhghethanCK，uringthematuritystage，ignificantdiferecespersistedspecificallyetweentreatments3，N4，N5 and CK.In summary，the optimal nitrogen application rate for Jiruanjing 1802 is 240kg⋅hm-2

Keywords：nitrogen application rate; growth and development;rice;Jiruanjing1802

水稻是世界三大主要粮食作物之一，是我国65% 以上人口的主粮，在粮食生产和消费中居主导地位。（剩余9408字）