尿素与不同含量的柠檬酸配施对黑青稞籽粒灌浆特性、氮素利用及产量的影响

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中图分类号：S512.3 文献标识码：A 文章编号：1000-4440（2025）11-2167-14

Abstract：Thisstudyaimedtoclarifytheoptimalapplicationrateofcitricacidforincreasing yieldinthecultivationof blackhighlandbarleyinLongziCounty，Shannan City，XizangAutonomousRegion.UsinglocalLongzisix-rowblack highland barley as material，five citric acid application treatments were set up，including 0kg/hm2 （CK）， 15kg/hm2 （T1）， 30kg/hm2 24 （T2）， 45kg/hm2 （T3），and 60kg/hm2 （T4）.The effects of urea and citric acid application on black highland barley yield formation，grainfillngdnamics，drymateraccumulation，ndnitrogenutlationefiiencywereivestigated.Thersultssowedthat，compared with CK，citric acidapplication treatment increased thegrainfillingrateofblackhighlandbarleyand enhanced the accumulation of dry matter and nitrogen indifferent parts at various growth stages，with T2 treatment being themost effective.Citric acid application enhanced the transport amount of dry matter and nitrogen stored invegetative organspre-flowering and increased the proportion of drymatter andnitrogen allocation in leaves during flowering，thereby significantly improved the total accumulation of photosynthates and their contribution to plant material supply. Thenumberof grainperspikecontributedthemosttoblack highlandbarleyyield.TheT2treatmensignificantlyincreasedyieldcomparedto CK，withasignificant increase in both efectivespikeletsandgrainnumber perspike.Inconclusion，applying30 kg/hm2 of citric acid with urea（T2）can effectively enhance theyieldof Longzi black highland barley.

Key words：black highland barley；citricacid；grainfiling characteristics；dry matter；nitrogen；yield components

大麦是最早被人类驯化且重要的作物之一，在食品加工业领域扮演着关键角色。（剩余18116字）