氮肥运筹对机插双季晚粳稻产量和氮肥利用率的影响.docx

氮肥运筹对机插双季晚粳稻产量和氮肥利用率的影响摘要：考察氮肥运筹对机械插秧双季晚粳产量和氮肥利用率的影响。结果表明T3（基肥、蘖肥和穗肥比例为5∶3∶2）有效穗数最高实际产量也最高达到599.5kg/667m2较T1（仅施基蘖肥）产量增加13.2%。随穗肥比例增加水稻产量、生物量积累量和氮肥利用率均呈现先增后减的趋势而茎鞘物质输出率（EPMSS）和转换率（TPMSS）逐渐减少。施氮处理齐穗后5d灌浆速率均低于CK（不施氮）而后灌浆速率逐渐高于CK。总之适当氮肥后移有利于提高水稻有效穗数、产量和氮肥利用率；氮肥在基肥、蘖肥和穗肥比例为5∶3∶2是机插双季晚粳最佳施氮模式。关键词：双季晚粳稻；机插秧；氮肥运筹中图分类号：S511.2+2；S511.3+3；S365文献标识码：A文章编号：0439-8114（2017）08-1474-03DOI：10.14088/ki.issn0439-8114.2017.08.018EffectofNitrogenApplicationtoYieldDevelopmentandNitrogenFertilizerEfficiencyofMachine-transplantedLateJaponicaRiceinDouble-SeasonRiceSystemPIChu-shu1CHENJian-ping2ZHAOFeng2LIYang2WANGBen-fu2ZHANGZhi-sheng2SHIHou-xing3XUShun-wen3（1.XishuiAgriculturalTechnologyExtensionCenterXishui438200HubeiChina；2.HubeiKeyLaboratoryofFoodCropGermplasmandGeneticImprovementInstituteofFoodCropsHubeiAcademyofAgriculturalSciencesWuhan430064China；3.YangxinAgricultureBureauYangxin435200HubeiChina）Abstract：Theresearchontheinfluenceofthenitrogenapplicationtoyieldandnitrogenefficiencyoflatejaponicariceindoubleseasoncroppingsystemwithmachine-transplantedseedling.TheresultsshowedthattheT3（basalfertilizertillerfertilizerandpaniclefertilizerproportion5∶3∶2）asthehighesteffectivepaniclesactualyieldwasthehighestupto599.5kg/667m2andtheT1（onlybasalandtillerfertilizer）productionincreasedby13.2%.Withtheincreaseofpaniclefertilizerproportionthericeyieldbiomassaccumulationandagronomyutilizationefficiencyofnitrogenallshowedatrendoffirstincreasingafterdecreasesandphotosyntheticmaterialtransferrate（EPMSS）andconversionrate（TPMSS）graduallyreduced.Fullpaniclenitrogenprocessingafter5dgroutingratewerelowerthanthatofCK（nonitrogenfertilizerapplied）andthengraduallyhigherthanthatofCK.Thereforeappropriatenitrogenbacktoimprovetheeffectivepaniclesofriceyieldandnitroge