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时间:2020-06-06
《稻田田面水氮磷素动态特征研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、中国雇擘c苎报2014,30(20):168-174ChineseAgriculturalScienceBulletin稻田田面水氮磷素动态特征研究宫亮,隽英华,王建忠2刘艳‘,孙文涛。(辽宁省农业科学院植物营养与环境资源研究所,沈阳110161;农业部农产品质量监督检验测试中心(沈阳),沈阳l10161)摘要:为了合理运筹施肥,防控农业面源污染,通过独立排灌系统的田间试验,设计了6个不同氮肥水平,研究了施肥后水稻田田面水氮素和磷素的动态变化特征。结果表明,施肥后田面水中的总氮(TN)、NH4~-N和NO,。.N浓度随着
2、施肥量的增加而增加,随着时间的推移三者的浓度呈现上升后下降的趋势,7天后趋于稳定;施入基肥后,Nl-N浓度在第2天达到峰值后迅速下降,第3天即下降到峰值的25.69%~36.80%;NO,.N浓度远远低于Nl{4-N浓度,3个施肥时期峰值分别为8.87、1.91和1.50mg/L,且出现在施肥后第3~5天。田面水NH4.N/TN随着施氮量的增加而增加,且在施肥后第2~3天达到峰值后下降。不同施氮量,相同施磷量处理条件下,田面水中TP浓度随着施氮量增加而增加;施肥后第1天,田面水中TP浓度达到峰值3次施肥后TP浓度峰值逐渐
3、降低。关键词:水稻;田面水;氮素;磷素中图分类号:S-3;X592文献标志码:A论文编号:2013.2619StudyontheVariationsofNitrogenandPhosphorusinSurfaceWaterBodyofPaddyIi'ieIdGongLiang,JuanYinghHa,WangJianzhong2,LiuYan,SunWentao(InstituteofPlantNutritionandEnvironmentalResources,LiaoningAcademyofAgricuhuralS
4、ciences,Shenyang110161;2Sttpervisiort&TestingCenterforFarmProductQuality,MinistryofAgriculture(Shenyang),Shenyang110161)Abstract:InordertolookforthebestfertilizationmanagementforcontrollingNandPlossavailably,afieldexperimentbasedonindependentirrigationsystemWasco
5、nductedtostudythedynamiccharacteristicsofnitrogenandphosphorusinsurfacewaterofpaddyfield.whichappliedt}lsixdiferentlevelsofnitrogenfertilizer.TheresultsshowedthatthehighamountsoffertilizerwillenhancetheconcentrationoftotalnitrogenN),ammoniumnitrogen(NH4一N)andnitr
6、atenitrogen(NO3一一N)inthesurfacewater.ThecontentofTN,NH4一NandNO3一Nincreasedatthebeginningandthendecreasedasthetimepast.finallyapproachedarelativelystablelevelafteraweek;NH4一Ninthesurfacewaterreachedthepeakonthefollowingdayafterfertilizerapplication.andrapidlydecre
7、asedto25.69%一36.80%ofthemaximumonthethirdday.TheconcentrationofN03一一NinsurfacewaterwaslowerthanthatofNH4+-N。andthepeakvaluewhichappearedduringthe3thdayto5thdayWas8.87mgCL,1.91mg/Land1.50mg/L,respectively.NH4一N/TNwasincreasedwiththeamountofnitrogenfertilizerandpea
8、ked2—3daysafterfertilizerapplied.WiththesamelevelofPfertilization.theconcentrationofTPwasincreasedwiththeamountofNfertilization.TheconcentrationofTPpeakedonthe
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