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控释氮肥对引黄灌区麦后复种青贮玉米养分吸收和品质的影响

Ningxia Journal of Agriculture and Forestry Science and technology(2023)

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Abstract
针对引黄灌区麦后复种玉米施肥不合理现状,以德美亚 1 号玉米品种为材料,研究控释氮肥优化施肥对麦后复种青贮玉米养分吸收和品质的影响.结果表明,控释氮肥优化施肥显著提高青贮玉米的鲜草和干草产量,其产量较常规施肥处理分别增加 9.58%和 7.38%,干草产量增加是通过提高玉米籽粒产量实现的.控释氮肥处理显著提高青贮玉米秸秆和籽粒的氮素养分含量,增加植株氮素养分吸收量.控释氮肥处理玉米秸秆和籽粒中粗蛋白含量分别比常规施肥处理提高 10.56%和 7.21%,籽粒中粗淀粉含量提高 8.17%.控释氮肥优化施肥处理可以提高青贮玉米产量和籽粒品质,增加氮、磷素养分吸收量,减少氮、磷素养分投入,降低环境风险.
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