Abstract
Coffee crop in Brazil is typically grown as a monoculture. However, we hypothesized that agroforestry system is favorable association for arbuscular mycorrhizal fungi (AMF), affecting its community structure and potentially impacting crop productivity and agroecosystem health. This study evaluated how the microclimate, soil depth, macauba field spacing and distance between coffee plants and palms affect the structure of the AMF community. The structure of the AMF community was influenced by the soil depth, microclimate features, soil moisture, maximum air temperature, and photosynthetically active radiation (PAR). The distance at which coffee-macauba influences ecological diversity indices of AMF, and higher diversity are related to the proximity between plants. AMF diversity (Richness and Shannon) in the agroforestry system exceeded that observed in the full-sun coffee in the 0-20 soil depth layer. Our results showed that the microclimate, soil depth, plant density, and distance between coffee from macauba affected the AMF community structure.
Highlights
AND OBJECTIVESCoffee plants show a high degree of dependence on arbuscular mycorrhizal fungi (AMF, Glomeromycota), especially in weathered soils with low natural fertility (Siqueira et al, 1998; Cardoso and Kuyper, 2006; Prates Júnior et al, 2020)
This study evaluated how the microclimate, soil depth, macauba field spacing and distance between coffee plants and palms affect the structure of the AMF community
Our results showed that the microclimate, soil depth, plant density, and distance between coffee from macauba affected the AMF community structure
Summary
Coffee plants show a high degree of dependence on arbuscular mycorrhizal fungi (AMF, Glomeromycota), especially in weathered soils with low natural fertility (Siqueira et al, 1998; Cardoso and Kuyper, 2006; Prates Júnior et al, 2020). The most diversified management of coffee plants in agroforestry systems and native forests increases the diversity of AMF (Dobo et al, 2018; Prates Júnior et al, 2019; Belay et al, 2020). This is related, among others, to the AMF enhancing the soil physical-chemical and biological properties, with better exploitation of ecological interactions. We tested the hypothesis that the density, microclimate, soil depth and distance between coffee and macauba palm affect AMF community structure
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