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Hi-sAFe: a 3D agroforestry model for integrating dynamic tree–crop interactions

Dupraz, Christian; Wolz, Kevin J.; Lecomte, Isabelle; Talbot, Gregoire; Vincent, Gregoire; Mulia, Rachmat; Bussiere, Francois; Ozier-Lafontaine, Harry; Andrianarisoa, Sitraka; Jackson, Nick; Lawson, Gerry; Dones, Nicolas; Sinoquet, Herve; Lusiana, Betha; Harja, Degi; Domenicano, Susy; Reyes, Francesco; Gosme, Marie; Van Noordwijk, Meine. 2019 Hi-sAFe: a 3D agroforestry model for integrating dynamic tree–crop interactions. Sustainability, 11 (8), 2293. 25, pp. https://doi.org/10.3390/su11082293

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Abstract/Summary

Agroforestry, the intentional integration of trees with crops and/or livestock, can lead to multiple economic and ecological benefits compared to trees and crops/livestock grown separately. Field experimentation has been the primary approach to understanding the tree–crop interactions inherent in agroforestry. However, the number of field experiments has been limited by slow tree maturation and difficulty in obtaining consistent funding. Models have the potential to overcome these hurdles and rapidly advance understanding of agroforestry systems. Hi-sAFe is a mechanistic, biophysical model designed to explore the interactions within agroforestry systems that mix trees with crops. The model couples the pre-existing STICS crop model to a new tree model that includes several plasticity mechanisms responsive to tree–tree and tree–crop competition for light, water, and nitrogen. Monoculture crop and tree systems can also be simulated, enabling calculation of the land equivalent ratio. The model’s 3D and spatially explicit form is key for accurately representing many competition and facilitation processes. Hi-sAFe is a novel tool for exploring agroforestry designs (e.g., tree spacing, crop type, tree row orientation), management strategies (e.g., thinning, branch pruning, root pruning, fertilization, irrigation), and responses to environmental variation (e.g., latitude, climate change, soil depth, soil structure and fertility, fluctuating water table). By improving our understanding of the complex interactions within agroforestry systems, Hi-sAFe can ultimately facilitate adoption of agroforestry as a sustainable land-use practice.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.3390/su11082293
CEH Sections/Science Areas: CEH Fellows
Directors, SCs
ISSN: 2071-1050
Additional Information. Not used in RCUK Gateway to Research.: Open Access paper - full text available via Official URL link.
Additional Keywords: alley cropping, silvoarable, windbreak, hedgerow, forestry, competition, facilitation, land equivalent ratio, long-term simulation, plasticity
NORA Subject Terms: Ecology and Environment
Hydrology
Agriculture and Soil Science
Date made live: 30 Apr 2019 11:15 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/523123

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