Page 221 - 《水资源与水工程学报》2022年第4期
P. 221
!33 " ! 4 # & ' ( ) & * + , - Vol.33No.4
2022 $ 8 % JournalofWaterResources&WaterEngineering Aug.,2022
DOI:10.11705/j.issn.1672-643X.2022.04.29
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FGHIJ:S147.34 KLMNO:A KPQJ:1672643X(2022)04021708
Effectsofslowreleasenitrogenfertilizerapplicationratioonyieldand
nitrogenfertilizerutilizationefficiencyofwinterwheat
ZOUQifang,GUXiaobo,LIYuannong,CHENPengpeng,CAOJunhao
(KeyLaboratoryofAgriculturalSoilandWaterEngineeringinAridandSemiaridAreas,MinistryofEducation,
NorthwestA&FUniversity,Yangling712100,China)
Abstract:ConsideringthelowfertilizerutilizationefficiencyinGuanzhong,ShaanxiProvince,theexperi
mentforthecombinedapplicationofslowreleasenitrogenfertilizerandureawascarriedoutinYangling,
ShaanxiProvince.Differentcombinationswasset,namely,N0(nonnitrogenfertilizer),N1(100% ure
a ),andfourdifferentfertilizerdosagesincludingN2(100% slowreleasenitrogenfertilizer),N3(25%
slowreleasenitrogenfertilizer+75% urea),N4(50% slowreleasenitrogenfertilizer+50% urea),N5
(75% slowreleasenitrogenfertilizer+25% urea),andthenonfertilizationCKwasusedasthecontrol.
Subsequently ,effectsofthecombinedapplicationofslowreleasenitrogenfertilizerandureaondrymatter
accumulationandnitrogenabsorptionofwinterwheat,soilnitratecontentanddistribution,yieldandutili
zationefficiencyofwaterandnitrogenwereanalyzed.Accordingtotheresults,comparedwithN1andN2
treatmentsthecombinedapplicationofslowreleasenitrogenfertilizerandureanotonlycansignificantly
increasethedrymatteraccumulation (4.69% -11.40%),nitrogenabsorption(5.92% -24.08%)and
yieldofwinterwheat(6.00% -22.41%),butalsocanenhancethecontentofnitratenitrogen
(2.09% -45.51%)inthesurfacesoil(0-40cm),reduceitsleachingtothedeepsoilandfinallyim
provethenitrogenutilizationefficiency.Inaddition,inN5treatment,thepartialproductivityofnitrogen
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