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    • 不同氮肥水平下大麦氮磷分配策略及利用效率分析

    WU Yueying, SU Yunwen, CHEN Chunyan, GUO Hui, CHE Fengyi,HU Xiaokang,WANG Tao

    Chinese Agricultural Science Bulletin（2023）

    大理大学

    Cited 0|Views4
    Abstract
    为探究洱海流域不同氮肥水平下大麦氮磷吸收及利用策略,为洱海流域的作物养分高效利用及农业可持续绿色发展提供一定的理论依据,本研究采用大田试验方法,设置5个氮肥梯度,选用'云大麦2号'和'S4'2个当地使用的大麦品种,分析了大麦花期和成熟期的干物质积累、氮磷利用和变化情况,以及大麦的产量构成.结果显示:随着施氮量增加,大麦成熟期干物质积累和产量构成均得到改善,其中籽粒产量的增加主要得益于单位面积籽粒数的增加,千粒重变化不显著.不同氮肥施加对大麦花期和成熟期各器官中磷含量的影响较小,而茎、叶氮含量随着施氮量的增加呈上升趋势.花期到成熟期,茎、叶中的氮、磷积累量出现显著下降,而穗中氮、磷的积累量则出现显著增加.施氮量的增加可以改善大麦的干物质积累和产量构成,尽管大麦花期到成熟期,茎、叶中氮磷减少量没有伴随氮施加水平发生显著改变,但穗中的氮磷积累量从花期到成熟期呈显著提升.
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    Key words
    barley,nitrogen levels,yield formation,nitrogen and phosphorus uptake,dry matter accumulation,nitrogen and phosphorus utilization efficiency
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