Record Details

Plant Available Zinc Is Influenced by Landscape Position in the Amhara Region, Ethiopia

OAR@ICRISAT

View Archive Info
 
 
Field Value
 
Relation http://oar.icrisat.org/11802/
https://doi.org/10.3390/plants10020254
doi:10.3390/plants10020254
 
Title Plant Available Zinc Is Influenced by Landscape Position in the Amhara Region, Ethiopia
 
Creator Desta, M K
Broadley, M R
McGrath, S P
Hernandez-Allica, J
Hassall, K L
Gameda, S
Amede, T
Haefele, S M
 
Subject Plant Nutrition
Fertilizers
Irrigation
Soil Science
Ethiopia
 
Description Zinc (Zn) is an important element determining the grain quality of staple food crops and
deficient in many Ethiopian soils. However, farming systems are highly variable in Ethiopia due to
different soil types and landscape cropping positions. Zinc availability and uptake by plants from soil
and fertilizer sources are governed by the retention and release potential of the soil, usually termed
as adsorption and desorption, respectively. The aim of this study was to characterize the amount of
plant available Zn at different landscape positions. During the 2018/19 cropping season, adsorptiondesorption
studies were carried out on soil samples collected from on-farm trials conducted at Aba
Gerima, Debre Mewi and Markuma in the Amhara Region. In all locations and landscape positions,
adsorption and desorption increased with increasing Zn additions. The amount of adsorption and
desorption was highly associated with the soil pH, the soil organic carbon concentration and cation
exchange capacity, and these factors are linked to landscape positions. The Freundlich isotherm fitted
very well to Zn adsorption (r2 0.87–0.99) and desorption (r2 0.92–0.99), while the Langmuir isotherm
only fitted to Zn desorption (r2 0.70–0.93). Multiple regression models developed by determining the
most influential soil parameters for Zn availability could be used to inform Zn fertilizer management
strategies for different locations and landscape positions in this region, and thereby improve plant
Zn use efficiency.
 
Publisher MDPI
 
Date 2021-01
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11802/1/plants-10-00254-v2.pdf
Desta, M K and Broadley, M R and McGrath, S P and Hernandez-Allica, J and Hassall, K L and Gameda, S and Amede, T and Haefele, S M (2021) Plant Available Zinc Is Influenced by Landscape Position in the Amhara Region, Ethiopia. Plants (TSI), 10 (2). p. 254. ISSN 2223-7747