DTPA-extractable zinc threshold for wheat grain yield response to zinc fertilization in Mollisols

Determining soil Zn thresholds for wheat (Triticum aestivum L.) is still challenging since soil Zn tests have been poorly calibrated. Therefore, this work aimed to determine, under field conditions, the DTPA-Zn critical threshold for wheat grain yield (GY) response to Zn-fertilization in non-calcareous Mollisols. We conducted 14 Zn-fertilization field trials in Typic Argiudolls from the Argentinean Pampas. Zinc fertilization increased GY in 6 out of 14 trials. Wheat GY response to Zn-fertilization ranged from 300 to 949 kg ha–1. Our DTPA-Zn threshold is the first one determined by field trials for wheat grown in Mollisols (1.03 mg kg−1, with a 95% confidence interval from 0.87 to 1.23 mg kg−1). This threshold was greater than those previously reported for other soil types. Future studies should compare different Zn-fertilization strategies for wheat on Mollisols by combining different fertilizer rates, sources, timings, and placements.

Bibliographic Details

Main Authors:	Martinez Cuesta, Nicolás, Carciochi, Walter, Salvagiotti, Fernando, Sainz Rozas, Hernan Rene, Wyngaard, Nicolás, Lopez De Sabando, Marcelo, Barbieri, Pablo
Format:	info:ar-repo/semantics/artículo biblioteca
Language:	eng
Published:	Wiley 2021-06-29T17:29:29Z
Subjects:	Trigo, Granos, Cinc, Tipos de Suelos, Molisoles, Aplicación de Abonos, Wheat, Grain, Zinc, Soil Types, Mollisols, Fertilizer Application, Fertilización,
Online Access:	http://hdl.handle.net/20.500.12123/9684 https://acsess.onlinelibrary.wiley.com/doi/10.1002/saj2.20295 https://doi.org/10.1002/saj2.20295
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