Do foliar applications of nickel increase urease activity and nutrient levels in pecan leaflets?

Angélica Anahi Acevedo-Barrera, Oscar Cruz-Alvarez, Ofelia Adriana Hernández-Rodríguez, Adalberto Benavides-Mendoza, Laura Raquel Orozco-Meléndez, Mayra Cristina Soto-Caballero, Dalila Jacqueline Escudero-Almanza and Damaris Leopoldina Ojeda-Barrios
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Angélica Anahi Acevedo-Barrera: Faculty of Agrotechnological Sciences, Autonomous University of Chihuahua, Chihuahua, México
Oscar Cruz-Alvarez: Faculty of Agrotechnological Sciences, Autonomous University of Chihuahua, Chihuahua, México
Ofelia Adriana Hernández-Rodríguez: Faculty of Agrotechnological Sciences, Autonomous University of Chihuahua, Chihuahua, México
Adalberto Benavides-Mendoza: Department of Horticulture, Autonomus Agricultural University Antonio Narro, Coahuila, México
Laura Raquel Orozco-Meléndez: Faculty of Agrotechnological Sciences, Autonomous University of Chihuahua, Chihuahua, México
Mayra Cristina Soto-Caballero: Faculty of Agrotechnological Sciences, Autonomous University of Chihuahua, Chihuahua, México
Dalila Jacqueline Escudero-Almanza: Faculty of Agrotechnological Sciences, Autonomous University of Chihuahua, Chihuahua, México
Damaris Leopoldina Ojeda-Barrios: Faculty of Agrotechnological Sciences, Autonomous University of Chihuahua, Chihuahua, México

Plant, Soil and Environment, 2022, vol. 68, issue 3, 129-136

Abstract: Nickel (Ni) deficiency limits the production of pecan. Concentrations of mineral nutrients and urease activity in leaflets of young pecan plants cv. Pawnee were evaluated in response to foliar applications of Ni as Ni sulfate or Ni citrate, or as chelates with EDDHA, EDTA, or DTPA. Significant variations were found in N-total concentration with Ni-EDDHA (27.17 ± 0.98 g/kg) and Ni-sulphate (28 ± 0.89 g/kg), where the latter together with Ni-citrate were high in phosphorus concentrations. Levels of Ni2+ (3.70 mg/kg), Mn2+ (222.73 mg/kg) and Zn2+ (38.69 mg/kg) were all increased in leaflets sprayed with Ni-EDDHA but the Mn2+ concentrations were similar for leaflets sprayed with Ni-sulphate. The Ni-DTPA spray significantly reduced foliar Fe2+ concentration (73.66 ± 3.44 mg/kg). No significant effects of the sprays were observed on the concentrations of total chlorophyll or carotenoids. The plants sprayed with Ni-EDDHA showed significant increases in leaflet area and leaflet dry weight and also in root dry weight. The urease showed maximum activity in leaflets sprayed with Ni-EDDHA, Ni-citrate and Ni-sulphate. This study suggests growers of the pecan should consider foliar sprays of Ni-EDDHA or Ni-sulphate to increase the levels of Ni in their trees if Ni is a growth-limiting factor.

Keywords: Carya illinoinensis; foliar fertilisation; availability of Ni; micronutrients; mouse-ear disease; photosynthetic pigments (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:68:y:2022:i:3:id:487-2021-pse

DOI: 10.17221/487/2021-PSE

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