西北地区水肥一体化密植春玉米适宜化控时期研究

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中图分类号：S513 文献标志码：A 文章编号：2097-2172（2025）07-0633-011

doi： 10.3969/j.issn.2097-2172.2025.07.008

Study on the Optimal Chemical Regulation Period for Densely Planted Spring Maize of Integrated Water and Fertilizer in Northwest China

XU Wenqian1，2，3，4， ZHAI Juan 1²， ZHANG Yuanmeng34， ZHANG Xiyun3，4， LI Shaokun 1，2，3，4 ， XUE Jun 3，4

（1.CollegeofAgriculture，SiheziUniversityiheziXijiang832O3，China;2.KeyLaboratoryofOasisEcoAgiculture， XinjiangProductionand Construction Corps，Shihezi Xinjiang 8320o3，China;3.InstituteofCrop Sciences，Chnese Academy of Agricultural Sciences，Beijing 10oo81，China; 4. Key Laboratory of Crop Physiology and Ecology， Ministry ofAgriculture and Rural Affairs，Beijing1Ooo81， China）

Abstract：Lodgingisamajorlimiting factorformaizeyield，andtheapplicationofchemicalregulatorscaneffectively enhance stalk mechanicalstrengthandpreventlodging.Toclarifytheefectsofchemicalregulationatdiferentgrowthstageson stalkdevelopmentandyield，thisstudyused twmaizevarieties，MC67OandDenghai618，asmaterials，chemicalreguationwas appliedatdegrohsgeeaf，laaffafsslig）.aesue morpholgyhicalgttedbodateotet，ldditsompontsereteedtoestigateft ofchemicalregulationtimingonstalkdevelopmentandyieldformation.ResultsshowedthatforMC670，theaverageintemode puncture strength under the 6 -leaf stage treatment increased by 10.8% over the control with no chemical regulation， the diameter of the basal1 to 6 internodes increased by 6.1% ，and internode dry matter at top，medium and bottom increased by 5.4% ， 18.9% and （2号 19.0% ，respectively. The contents of cellulose，hemicellulose，and lignin increased by 12.5% ， 14.8% and 5.4% . For Denghai618， the averageinternodepuncture strength of the basal1to5 internodesunderthe8-leaf treatment increased by 16.6% over the control with no chemical regulation，the diameter of medium internodes increased by 14.6% ，internode length atbottom and mediumwere shortened by 11.9% and 2.0% ，respectively，and internode dry matter at medium and top increased by 33.1% and 5.0% ， respectively. Under 15-leaf treatment，yields of both varieties increased by 5.5% ～11.2% compared to the control with no chemical regulation.Thenumberofearsharvesteddidnotsignificantlydiferfromthecontrol，butthenumberofkernelsperearand 100- （20 kernel weight were higher.

KeyWords：Spring maize; Integrationofwaterandfertilizer; Condensed planting; Chemicalregulationperiod; Northwestregion

玉米作为世界三大粮食作物之一，年产量超过7亿t，占世界粮食总量的1/3「1]。（剩余14588字）