旱地栽培对云南直播粳稻生长发育及稻米品质的影响

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中图分类号：S511 文献标识码：A 文章编号：1006-060X（2025）11-0009-09

Abstract：Thisstudyaimed toinvestigatetheefectsofdrylandcultivation（DC）onagronomicandgrainqualitytraitsof directseeded japonicariceinYunan.Thehigh-qualityhybridjaponicaricevarietyDianheyou615'andtheconventionaljaponicarice variety'hujing54'wereemployedasexperimentalmaterials.DCwascompared withconventionalfoodedcultivation （FCinterms of theagronomic，yield，andgrainqualitytraits.TheresultsshowedthatcomparedwithFC，DCprolongedthegrowthperiodand caused significantreductionsinseedlingemergencerate，numberof ilers，plantheight，fagleaflengthpaniclelength，uberof flld grais pernicletotalmberofgaisprpicle，dymateaculatio，andieldilebignigncatects onseed-setingrateor1O-grainweight.Nosignifcantchangesocurredinbrownriceateormilledriceate，whilesignificant decreases inchalkinessdegreeandchalkygrainrate wereobserved.Furthermore，DCdecreasedtheproteincontent，while icreasing theamylosecontentand taste valueofrice grains.RVA profilecharacteristic values indicated improvedricetexture.In summary， althoughDCanedgainualityidveselytedgrooictraitsdyls.Diaou6'eiedreateraptabilityto DC than 'Chujing 54′ ，serving as a more promising variety for water-scarce regions.

Keywords：drylandcultivation;diect-seededjaponicaiceinYunnan;agronomictraits;orelatioanalysis;grainquait;VA profile characteristic values

水稻（OryzasativaL.）是世界主要粮食作物之一，全球超过 50% 的人口以稻米为主食，其生产与供应对经济发展和社会稳定具有重要影响[1]。（剩余15180字）