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Tree pruning, zone and fertiliser interactions determine maize productivity in the Faidherbia albida (Delile) A. Chev parkland agroforestry system of Ethiopia

Citation

Dilla, AM and Smethurst, PJ and Barry, K and Parsons, D and Denboba, MA, Tree pruning, zone and fertiliser interactions determine maize productivity in the Faidherbia albida (Delile) A. Chev parkland agroforestry system of Ethiopia, Agroforestry Systems ISSN 0167-4366 (2018) [Refereed Article]

Copyright Statement

Copyright 2018 Springer Nature B.V.

DOI: doi:10.1007/s10457-018-0304-9

Abstract

Faidherbia albida is an important tree species in the parkland agroforestry system of the Rift Valley region, central and south-eastern Ethiopia. Positive effects of F. albida on crop production are widely recognised. However, the effects of tree pruning, zone and fertiliser interactions on crop growth have not been addressed in earlier studies. A field experiment containing three levels of tree pruning (100% pruned, 50% pruned, and unpruned) as main plots, and application of recommended rates of N and P fertilisers as sub-plots, was conducted during the 2015 and 2016 growing seasons. Maize grain yield and biomass, light intensity, and soil nutrients and moisture were measured at different positions from each F. albida tree trunk (02, 24 and 46m) and in crop-only plots. Biomass and yield of maize were significantly greater under tree canopies compared to crop-only plots in both the 2015 and 2016 growing seasons, regardless of pruning levels. Fertilisation significantly increased yields under tree canopies compared to crop-only plots in both years. Light intensity increased with distance from trees and with greater pruning levels. Soil carbon and nutrient concentrations and moisture content decreased with increasing distance from tree and with soil depth. These results suggest that maize production and profitability could be maintained or improved through only partial pruning of F. albida rather than pollarding, and by preferentially applying fertilisers in normal and wet years. Recommendations need to be evaluated in a total system context including other rotational crops, fuel, livestock and socio-economic factors.

Item Details

Item Type:Refereed Article
Keywords:Ethiopia, agroforestry, biomass, light, nutrients, soil, yield
Research Division:Agricultural and Veterinary Sciences
Research Group:Agriculture, Land and Farm Management
Research Field:Sustainable Agricultural Development
Objective Division:Plant Production and Plant Primary Products
Objective Group:Summer Grains and Oilseeds
Objective Field:Maize
UTAS Author:Dilla, AM (Mrs Aynalem Dilla)
UTAS Author:Barry, K (Associate Professor Karen Barry)
UTAS Author:Parsons, D (Dr David Parsons)
ID Code:128942
Year Published:2018
Web of Science® Times Cited:1
Deposited By:Agriculture and Food Systems
Deposited On:2018-10-28
Last Modified:2019-03-05
Downloads:0

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