Influence of long-term nitrogen fertilization on micronutrient density in grain of winter wheat (Triticum aestivum L.)

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• 作者：Rongli Shi ; Yueqiang Zhang ; Xinping Chen ; Qinping Sun ; Fusuo Zhang ; Volker Rö ; mheld ; Chunqin Zou
• 关键词：Micronutrient ; Nitrogen fertilization ; Wheat grain ; Milling fraction
• 刊名：Journal of Cereal Science
• 出版年：2010
• 出版时间：January 2010
• 年：2010
• 卷：51
• 期：1
• 页码：165-170
• 全文大小：195 K

文摘

A long-term (1999–2007) field experiment was conducted to investigate the effects of three nitrogen (N) fertilization rates (0, 130, and 300 kg N/ha) on micronutrient density in wheat grain and its milling fractions. At maturity, grains were harvested and fractionated into flour, shorts, and bran for micronutrient and N analysis. N fertilization increased iron (Fe), zinc (Zn), and copper (Cu) density in wheat grain compared to the control. Increase of N application rate from 130 to 300 kg N/ha, however, did not further increase the three micronutrient densities in grain. Micronutrient concentrations were usually highest in the bran and lowest in the flour. High N application increased Zn and Cu densities in all three milling fractions and increased Fe concentration in shorts and bran but not in flour. N application did not affect the manganese (Mn) concentration in grain. N fertilization changed the proportions of Fe and Cu in flour and bran but did not affect the distribution of Zn. Because N fertilization increased micronutrient accumulation in wheat grain, proper management of N fertilization has the potential to enhance the nutritional quality of this important food.