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By Emilie Vansant
I am so excited to share at last some of the results from my PhD research on land use and nutrition, published today in Nature Food – Open Access! Here, we show how sourcing food from on-farm trees can benefit people’s diets in rural Malawi.
In countries like Malawi, where most rural households rely on rain-fed agriculture, people’s diets can depend on what crops they grow. Yet, policies designed to improve food security often focus on increasing the productivity of calorie-rich staple grains, which have done little to address the country’s high rates of malnutrition (as far more people suffer from micronutrient deficiencies than hunger).
Trees are an important source of nutrient-dense foods, yet if and how they can support dietary quality remains poorly understood. Through linking tree cover estimates from high-resolution satellite imagery with detailed food consumption data in Malawi, our research evidences how sourcing food directly from trees on farms can support women’s micronutrient adequacy across dry and wet seasons.
For example: Compared to women without food trees, women who sourced food from their own trees had on average 8-15% higher levels of zinc, vitamin A, iron and folate adequacy in the dry season, and 6-12% higher levels of zinc, vitamin A and folate adequacy in the wet season.
To tackle the interconnected problems of climate change, food insecurity, and biodiversity loss, we need solutions that address environmental and human health in tandem. It is clear that trees can and must play a role in such solutions.