Document Type : Research Paper
Authors
1
PhD Student, Department of Soil Science, Faculty of agriculture, Shahid Chamran University of Ahvaz
2
Associate Prof., Dept. of Soil Science and Engineering, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
3
Professor, Department of Soil Science, Faculty of agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
4
Professor, Department of Production Engineering and Plant Genetics, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
5
Assistant Professor., Department of Chemistry, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Abstract
This experiment was conducted to evaluate the effectiveness of seed priming with zinc aminochelates on the zinc concentration in sunflower seeds and to determine the different chemical forms of zinc in the soil solution. The study was arranged in a randomized complete block design (RCBD) with three replications during the 2021-2022 growing season at the research farm of Shahid Chamran University of Ahvaz. The experimental treatments consisted of seed priming with solutions containing a 2% zinc concentration from zinc glycine and zinc methionine aminochelates (2%), ZnSO₄ (2%) fertilizer, and a control treatment (without priming). Visual MINTEQ geochemical software was utilized to determine the dominant Zn species in the soil solution phase. The results revealed that seed priming with Zn aminochlates, especially [Zn(Met)₂], significantly reduced soil pH and significantly increased DOC (41.8%), soil soluble Zn (46.9%), soil available Zn (30.3%), and Zn concentrations in both leaves (65.7%) and seeds (8.18%) compared to the ZnSO₄ treatment. Seed priming with Zn aminochelates and ZnSO4 fertilizer significantly affected the distribution percentage of Zn chemical species in the soil solution. The highest increase in concentration of free Zn (Zn2+), Zn bound to dissolved organic matter and ZnSO4 species as the dominant Zn species in the soil solution phase was obtained by the priming treatment with [Zn (Met)2] aminochelate. Therefore, seed priming with Zn aminochelates, particularly [Zn(Met)₂], can be recommended as an effective strategy to improve plant nutrition, enhance sunflower seed Zn enrichment, and ultimately promote the nutritional quality of agricultural products in calcareous soils.
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