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氮肥用量对玉米籽粒主要矿质元素质量分数的影响
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引用本文:黄玉芳,叶优良,陈文莉,任 宁,赵亚南,汪 洋.氮肥用量对玉米籽粒主要矿质元素质量分数的影响[J].西北农业学报,2020,30(6):870~876
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作者单位
黄玉芳,叶优良,陈文莉,任 宁,赵亚南,汪 洋 (1.河南农业大学 资源与环境学院/河南省农业绿色发展工程技术研究中心郑州 4500022.新乡县朗公庙镇人民政府河南新乡 453700) 
基金项目:国家重点研发计划项目(2017YFD0200100)。
中文摘要:为明确施氮量对玉米籽粒中主要矿质元素质量分数的影响,以‘博农118’‘浚单22’和‘郑单958’为材料,在河南温县设置5个氮肥水平(0、120、180、240、360 kg/hm2),研究不同施氮量对玉米籽粒N、P、K、Ca、Mg、Fe、Mn、Cu、Zn、B等主要矿质元素质量分数的影响。结果表明:施氮显著提高了玉米籽粒N、Ca、Fe、Cu、Zn、B质量分数,Mg和Mn质量分数受施氮量影响较小,但P质量分数明显下降。‘浚单22’籽粒中多种矿质元素质量分数都明显高于‘郑单958’‘博农118’介于二者之间。施氮在提高玉米籽粒产量同时降低了P/Ca、 P/Mg、 P/Fe和P/Zn的比值,增强了这4种元素的生物有效性。此外,通过增施氮肥提高玉米籽粒中矿质元素质量分数能够降低外源元素添加剂的使用,进而提高饲料安全性,降低饲料成本。
中文关键词:氮肥  玉米  籽粒  矿质元素  微量元素
 
Effects of Nitrogen Application Rates on Mineral Mass Fractions of Maize Grain
Abstract:This study is to clarify the effect of nitrogen (N) application rate on the mass fraction of the main mineral elements of maize grains. Three cultivars (‘Bonong 118’, ‘Xundan 22’ and ‘Zhengdan 958’) were selected as experimental materials. Five levels of N (0, 120, 180, 240 and 360 kg/hm2) were conducted at Wenxian county, Henan province. The effects of different N application rates on the mass fractions of mineral elements such as N, P, K, Ca, Mg, Fe, Mn, Cu, Zn and B in maize were studied. The results showed that the mass fractions of N, Ca, Fe, Cu, Zn and B in wheat grains increased with increasee of N application rates. Nevertheless, the Mg and Mn mass fraction of grains were less affected by N application, whilst the P mass fraction of grains significantly decreased with increasee of N application rates. The mass fractions of various mineral elements in the grains of ‘Xundan 22’ were significantly higher than that of ‘Zhengdan 958’, and ‘Bonong 118’ was the second highest among the three cultivars. Application of N fertilizer increased the grain yield of wheat while reducing the ratio of P/Ca, P/Mg, P/Fe and P/Zn, and enhancing the bioavailability of these four elements. Additionally, increase of N fertilizer application could increase the mass fraction of mineral element of maize grains, finally, use of exogenous elemental additives could be reduced, the feed safety could be improved, and feed costs could be reduced.
keywords:Nitrogen fertilizer  Maize  Grain  Mineral element  Microelement
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