西藏山南地区不同种植密度对“先达103”玉米生长发育的影响

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关键词玉米；农艺性状；种植密度；产量；先达103;地区

中图分类号S513文献标识码A

文章编号 0517-6611（2025）21-0029-06

doi：10.3969/j.issn.0517-6611.2025.21.006

AbstractToexploretheotialplantigdenstyofewlyintroducedvarietiesincalareaissudytok“XianaO”，anewlyintroduced corn variety in Xizang as the object.Five density cultivation experiments were set up：75 OOo plants/ ℏm2 （M1），90 000plants /hm2 （M2）， 105 000 plants /hm2（M3） ，120 000 plants /hm²（M4），135 000 plants /hm2 （M5），and seedling height，leaf age，ear position，and plant height weremeasuredndanalyzd.Tersultsshowedtattheicreaseofplantingdensitydelayedthetaselingstage，silingstageandipening stage of Xianda 1O3.With the increase in planting density，the leaf age of the“Xianda 103′′ showed a trend of first increasing and then decreasing，buteisitltfydoettt ges.Denseplantingsigniicantlyeducdtiingate，doublespikerate，stalkdameteandtotalafnumberof“Xianda3”.Ahoghte percentageofptystalkireasedwitteicreasefplantingensityeiceaseofplatigsitreasedteieldiplot especialltheplantingdensityofM3assignificantlyhghertantatofotherplantingdensities.Theresultsofseedexaminationofaand graintraitsshowedtataltoughthearandgaitraitsunderM2plantigweresuperiortootherplantingdenitis，intersofovralland yield，"Xianda 103′′ under M3 planting density wassignificantly higher than that under M2，which was more suitable for“Xianda103”planting in Shannan Region of Xizang.

Key wordsMaize;Agronomic trait; Planting density; Yield ; Xianda 1O3;Shannan Region ; Xizang

玉米（ZeamaysL.）作为我国重要的粮食和饲料作物被广泛种植，增加玉米种植密度和单位玉米收获穗数已成为提高玉米群体产量的重要途径和关键措施之一[1-2]。（剩余9374字）