AI Article Synopsis
- Field experiments from 2018 to 2020 evaluated the effects of high concentrations of various zinc (Zn) sources on the Zn levels in waxy corn seeds and agronomic performance.
- Excessive application of zinc sulfate (ZnSO) led to negative effects like foliar burn and grain yield loss, while ZnEDTA and Glycine-chelated Zn (ZnGly) showed better tolerance but varied responses in foliar burn.
- Results indicated that higher concentrations of Zn increased seed Zn levels, with ZnGly performing better in terms of recovery rate compared to ZnEDTA, suggesting the importance of improving chelating technologies for effective Zn biofortification.
Article Abstract
To determine whether high spraying concentrations of Zn sources increase the Zn concentration in waxy corn (Zea mays L. var. ceratina Kulesh) seeds without compromising agronomic performance, field experiments were conducted between 2018 and 2020. Excess ZnSO application caused foliar burn, barren ear tip, and grain yield loss. ZnEDTA and Glycine-chelated Zn (ZnGly) caused less foliar burn, but Glycine-mixed Zn caused more foliar burn than ZnSO. The seed Zn concentration increased with spraying Zn concentration. ZnEDTA (≤0.8%) had a higher threshold concentration than ZnGly (≤0.4%). Nevertheless, Zn biofortification efficacy did not significantly differ between 0.4% ZnGly and 0.8% ZnEDTA, and the grain Zn recovery rate of 0.4% ZnGly was much higher than that of 0.8% ZnEDTA. Additionally, dual-isotope labelling tests confirmed that N-glycine and Zn in ZnGly interacted. In the future, chelating technology is essential for developing new Zn fertilizers to optimize Zn biofortification efficacy.
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| http://dx.doi.org/10.1016/j.foodchem.2021.131031 | DOI Listing |
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