不同施氮量对节水抗旱稻产量及氮肥利用效率的影响
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（204号（1 2）
中图分类号：S511.062 文献标志码：A 文章编号：1673-6737（2025）04-0001-08
Effects of Different Nitrogen Application Rates on the Yield and Nitrogen Use Efficiency of Water-saving and Drought-resistance Rice
ZHANG Feng-jie¹²，LI Yangl² ，WANG Hong-wei¹² ，TA Nal² WANG Jian 1，2 ，ZHANG Li-yan¹²，BAO Hong-xia12*
（1 Tongliao Academy of Agriculture and Animal Husbandry Sciences/Tongliao Northern Key Laboratory ofRice Breeding，Tongliao，Inner Mongolia O28O15，China;
2 InnerMongolia KeyLaboratoryof Rice Breeding InnovationinNorthern Cold Region，Hinggan League， InnerMongolia 137400，China）
Abstract：Inordertosolvetheproblemof nitrogen fertilizerapplicationrateof water-savinganddrought-resistantrice，the efect of nitrogen fertilizerreductionontheyieldandnitrogenuseeficiencyof water-savinganddrought-resistantricewas studied.In2O22thepoexperimentwacarredout，andfivetreamentsweresetasotrol，lowrogenN1（pureogen 126kg/hm2 ，medium nitrogen N2 （pure nitrogen153 kg/hm2），conventional nitrogenN3 （pure nitrogen18O kg/hm2）andhigh nitrogen N4 （pure nitrogen 200kg/hm2 ）.The results showed that the yield of water-savingand drought-resistant rice was the highestunderN3conditions，buttherewasnosignificantdiferencebetweentheyieldofN2treatmentandN3treatment，and N2treatment otainedhighereconomicbenefitsbyreducingnitrogen fertilizerinput.TheN3treatmentcouldcontinuously increasethebiomassofwater-savinganddrought-resistantricethroughthetotalamountofnitrogenfertilizercontroland reasonablemanagementandfinallyreachthemaximumvalue，andtheN2treatmentwasnotsignificantlydiferentfromthe N3treatmentafteroptimizingthenitrogenfertilizerreduction，indicatingthattherewasroomforreducingnitrogenfertilizer. Withtheincreaseofnitrogenapplicationrate，thenitrogenaccumulationofwater-savinganddrought-resistantriceincreased significantly， but when the nitrogen application rate exceeded 153kg/hm2 ，theincrease of nitrogen accumulation at the maturity stageof water-savinganddrought-resistant icesloweddown，sothenitrogenappicationrateofN2 mayreducethe wasteofnitrogenfertlier.Basedonfactorssuchasyield，nitrogenuptakeandutilization，andinputcost，thesuitable nitrogen fertilizer dosage for water-saving and drought-resistant rice was 153～180kg/hm2
Key Words：Water-saving and drought-resistance rice; Nitrogen fertilizer use efciency； Yield
水稻作为我国重要的粮食作物之一，对我国粮食安全起着至关重要的作用。（剩余8823字）