Zinc bioavailability and nitrogen concentration in grains of wheat crop sprayed with zinc sulfate, ammonium sulfate, ammonium chloride, and urea

Khan, Ali Muhammad; Hussain, Shahid; Rengel, Zed; Shah, M. A.

doi:10.1080/01904167.2018.1484472

Cited by 10 publications

(1 citation statement)

References 52 publications

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“…The application of Zn can simultaneously increase crop yield and grain Zn content under limited soil Zn availability (Drissi et al 2015;Dimkpa et al 2017aDimkpa et al , b, 2018bDimkpa et al , 2019a. Grain Zn content can be more than doubled, even under sufficient Zn soil supply, through foliar Zn application, while grain P or phytate content is not, or only modestly, affected (Zhang et al 2012;Khan et al 2018;Xia et al 2018). As such, foliar Zn fertilization can significantly reduce the PA/Zn molar ratio and increase the bioavailability of both Zn and P. Wang et al (2015) demonstrated a marked reduction in PA/Zn ratio from over 30 in the control treatment to below 15 with Zn fertilization.…”

Section: Approaches To Improve Nutritional Quality By Reducing Phytatmentioning

confidence: 99%

Exploring phosphorus fertilizers and fertilization strategies for improved human and environmental health

2020

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Mineral phosphorus (P) fertilizers support high crop yields and contribute to feeding the teeming global population. However, complex edaphic processes cause P to be immobilized in soil, hampering its timely and sufficient availability for uptake by plants. The resultant low use efficiency of current water-soluble P fertilizers creates significant environmental and human health problems. Current practices to increase P use efficiency have been inadequate to curtail these problems. We advocate for the understanding of plant physiological processes, such as physiological P requirement, storage of excess P as phytate, and plant uptake mechanisms, to identify novel ways of designing and delivering P fertilizers to plants for improved uptake. We note the importance and implications of the contrasting role of micronutrients such as zinc and iron in stimulating P availability under low soil P content, while inhibiting P uptake under high P fertilization; this could provide an avenue for managing P for plant use under different P fertilization regimes. We argue that the improvement of the nutritional value of crops, especially cereals, through reduced phytic acid and increased zinc and iron contents should be among the most important drivers toward the development of innovative fertilizer products and fertilization technologies. In this paper, we present various pathways in support of this argument. Retuning P fertilizer products and application strategies will contribute to fighting hunger and micronutrient deficiencies in humans. Moreover, direct soil P losses will be reduced as a result of improved P absorption by plants.

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