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Overview

Agroforestry can play an important role in delivering more tree planting on farms, improving climate resilience, enhancing carbon storage and climate mitigation and encouraging more biodiversity in our farming systems (ETAP 2021-2024).

Through evidence reviews and novel empirical research, this project will address key gaps in knowledge to support effective agroforestry policy and action. The identification of knowledge gaps is guided by a panel of stakeholders. Topics covered include a tree species guide for UK agroforestry and carbon modelling for agroforestry.

Expanding Agroforestry’ is a 2.5-year project which started at the end of 2022 as part of the Nature for Climate Fund.

Research objectives

  1. Identify and agree with stakeholders the key policy and research questions, which would enable agroforestry expansion
  2. Provide evidence syntheses of existing knowledge, gap analysis to identify what is not yet known, and an overview of research which is in progress.
  3. Undertake further empirical research to extend and strengthen the knowledge base on agroforestry for ecosystem service delivery.
  4. Establish an agroforestry research strategy to extend beyond the project, to service long-term knowledge requirements, including an experimental network of sites, liaising with the emerging projects and partner networks.

Research Questions

  1. What are the key policy questions underpinning agroforestry (AF) deployment, and what are the evidence/knowledge synthesis priorities which can deliver the answers?
  2. What quantitative evidence is available for the ecosystem services and disservices from AF systems?
  3. What are the key considerations for the regulation of AF, learning from measures outside the UK?
  4. How do site, soil, silviculture and climatic factors influence the ecological suitability and productivity of AF trees species?
  5. Which established AF sites are available to act as exemplar case studies
  6. What is the contribution of silvopastoral agroforestry systems, to climate change mitigation? What are the soil health benefits of AF?
  7. How can impacts on priority species and habitats be taken into account in AF expansion?

Latest updates

We have produced a ‘Tree Species Guide for UK Agroforestry Systems’ which aims to provide an overview of the physical characteristics, environmental tolerances, silvicultural characteristics, and ecosystem services and disservices, for a selection of 33 species of trees and shrubs that could be planted in UK agroforestry systems. It was produced by the University of Reading and Forest Research in partnership with Defra and the Expanding Agroforestry project stakeholder group. More information can be found on the Expanding Agroforestry: A Tree Species Guide for Agroforestry in the UK project page.

Soil carbon and soil Green House Gases (GHG) have been assessed at different agroforestry systems. Soil acidity, nitrogen availability, phosphorous and cations (calcium, magnesium and potassium) have been also assessed at the sites. At some sites, soil biodiversity has been also assessed including bacterial and fungal, mesofauna and earthworms’ communities. The agroforestry systems evaluated so far include shelterbelts, short rotation forestry planted on ex arable and grassland and silvopastoral systems. 

An interactive database of priority and protected species and whether they would benefit or disbenefit from agroforestry expansion,  has been developed and is currently being tested by a user group.

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Research

Expanding Agroforestry: A Tree Species Guide for Agroforestry in the UK

This ‘Tree Species Guide for UK Agroforestry Systems’ provides an overview of 33 species of trees and shrubs that could be planted in UK agroforestry systems.

Status current
Authors
Alice Broome

Senior Scientist - Priority species/ habitats

Forestry Staff Mike Perks.803521b6.fill 600x600 1
Mike Perks

Principal Scientist

Forestry Staff Vanguelova Elena.2e16d0ba.fill 600x600 1
Elena Vanguelova

Senior Biogeochemist / Soil Sustainability Research Leader

Kate Beauchamp staff profile picture.
Kate Beauchamp

Programme Manager