Zhang Y-Q, Deng Y, Chen R-Y, Cui Z-L, Chen X-P, Yost R, Zhang F-S, Zou C-Q. 2012. The reduction in zinc concentration of wheat grain upon increased phosphorus-fertilization and its mitigation by foliar zinc application. Plant and Soil 361:143-152

Summary

This field-based study investigates the antagonistic relationship between increased phosphorus fertilisation and zinc accumulation in wheat grain, a concern for both agronomic productivity and human nutritional quality. The authors likely demonstrate that elevated phosphorus inputs reduce grain zinc concentration, potentially through zinc immobilisation in the soil or restricted root uptake, and that foliar zinc application can partially or fully restore grain zinc levels. The paper contributes to understanding nutrient interactions in intensively managed cereal systems and the potential of targeted micronutrient interventions to maintain grain nutritional quality.

UK applicability

Although conducted in China, the findings are broadly applicable to UK arable systems where high phosphorus inputs are common and wheat grain zinc concentrations have declined over decades; the evidence supporting foliar zinc application as a practical agronomic intervention is relevant to UK farm advisory practice and soil fertility management.

Key measures

Grain zinc concentration (mg/kg); phosphorus application rate (kg/ha); foliar zinc application rate; grain yield (t/ha)

Outcomes reported

The study measured zinc concentration in wheat grain under varying rates of phosphorus fertilisation, and assessed whether foliar zinc application could offset dilution or antagonism effects on grain zinc content.

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