Artículo
Effect of zinc application strategies on maize grain yield and zinc concentration in mollisols
Martínez Cuesta, Nicolás
; Carciochi, Walter Daniel
; Sainz Rozas, Hernan Rene
; Salvagiotti, Fernando
; Colazo, Juan Cruz; Wyngaard, Nicolás
; Eyherabide, Mercedes; Ferraris, Gustavo Nestor; Barbieri, Pablo Andres
Fecha de publicación:
11/2020
Editorial:
Taylor & Francis
Revista:
Journal of Plant Nutrition
ISSN:
0190-4167
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Maize (Zea mays L.) is highly susceptible to zinc (Zn) deficiency. Different application strategies (AS) can be utilized to improve grain yield (GY) and quality (Zn biofortification) by combining Zn fertilizer rate, source, timing, and placement techniques. This study aimed to evaluate whether different Zn-AS (soil, seed, and foliar) affect maize GY and grain Zn concentration in Mollisols with contrasting soil Zn availability and pH. Five site-years field experiments were carried out. Treatments (Zn-AS) were compared to a control, and included: seed-Zn, 0.3 kg Zn ha−1; foliar-Zn, 0.7 kg Zn ha−1 at V6 stage; and soil-Zn, 2.1 kg Zn ha−1 surface banded. Zinc fertilization increased GY (response ranged from 892 to 2519 kg ha−1) in four of five sites (p < 0.05). The evidence indicates that in scenarios of very low soil Zn availability (<0.9 mg kg−1 Zn-DTPA) greater Zn rates are required, and therefore soil-Zn and foliar-Zn are the more suitable AS. Grain Zn concentration ranged from 19.5 to 43.1 mg kg−1 and was not affected by Zn-AS. At all sites, even those showing GY response to Zn fertilization, grain Zn concentration in the control treatment was above the sufficiency threshold for maize GY (18 mg kg−1), indicating that this threshold needs to be updated for the current maize hybrids. Grain Zn concentration was predicted by the model: grain Zn concentration = 39.56 − 0.002 × GY + 9.62 × Zn-DTPA (R2 = 0.38).
Palabras clave:
AGRONOMIC BIOFORTIFICATION
,
MICRONUTRIENTS
,
SOIL FERTILITY
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Articulos (IPADS BALCARCE)
Articulos de INSTITUTO DE INNOVACIÓN PARA LA PRODUCCIÓN AGROPECUARIA Y EL DESARROLLO SOSTENIBLE
Articulos de INSTITUTO DE INNOVACIÓN PARA LA PRODUCCIÓN AGROPECUARIA Y EL DESARROLLO SOSTENIBLE
Citación
Martínez Cuesta, Nicolás; Carciochi, Walter Daniel; Sainz Rozas, Hernan Rene; Salvagiotti, Fernando; Colazo, Juan Cruz; et al.; Effect of zinc application strategies on maize grain yield and zinc concentration in mollisols; Taylor & Francis; Journal of Plant Nutrition; 44; 4; 11-2020; 486-497
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