Journal
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
Volume 94, Issue 10, Pages 2016-2022Publisher
WILEY
DOI: 10.1002/jsfa.6518
Keywords
soil Zn application; foliar Zn application; Zn concentration in grain; potentially Zn-deficient calcareous soil
Funding
- National Natural Sciences Foundation of China [31071863, 40971179]
- fundamental Research Funds for Northwest AF University [QN2011074]
- Innovative Research Team Program of Northwest AF University
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BACKGROUND: The concentration of Zn and phytic acid in wheat grain has important implications for human health. We conducted field and greenhouse experiments to compare the efficacy of soil and foliar Zn fertilisation in improving grain Zn concentration and bioavailability in wheat (Triticum aestivum L.) grain grown on potentially Zn-deficient calcareous soil. RESULTS: Results from the 2-year field experiment indicated that soil Zn application increased soil DTPA-Zn by an average of 174%, but had no significant effect on grain Zn concentration. In contrast, foliar Zn application increased grain Zn concentration by an average of 61%, and Zn bioavailability by an average of 36%. Soil DTPA-Zn concentrations varied depending on wheat cultivars. There were also significant differences in grain phytic acid concentration among the cultivars. Alaboratory experiment indicated that Zn (from ZnSO4) had a low diffusion coefficient in this calcareous soil. CONCLUSION: Compared to soil Zn application, foliar Zn application is more effective in improving grain Zn content of wheat grown in potentially Zn-deficient calcareous soils. (C) 2013 Society of Chemical Industry
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