Shade tree species impacts on soil fauna and C, N, P cycles in Costa Rican organic and conventional coffee agroforestry systems
In: Proceedings of the 20th Nitrogen, Workshop "Coupling C-N-P-S cycles". INRA, Agrocampus Ouest. Rennes: INRA, 427-428. Nitrogen Workshop "Coupling C-N-P-S cycles". 20, Rennes, France, 25 Juin 2018/27 Juin 2018
"Coffee is a major export product for developing countries that provides the livelihoods of tens millions of people (Pendergrast, 2009). Coffee is traditionally grown under shade trees to decrease physiological stress and provide additional services to the farmers as food or material supply (fruit trees, timber trees) (Tscharntke et al., 2011). However, agricultural intensification in Central America led to conversion of shaded to unshaded coffee systems to increase short-term income, but may have direct consequences on soil biological fertility (Perfecto et al., 2007). An important stake nowadays is to find the right compromise between decent yields and synthetic inputs reduction through promotion of soil biological activity.
Our objective was thus to determine how two common shade trees in coffee agrosystems, Terminalia amazonia and Erythrina poeppigiana, would impact on soil C, N, P cycling in association with soil fauna."