The work was performed aiming to check the influence of the agroforestry system and water availability on the density of Arbuscular Mycorrhizal Fungi (AMF), and to correlate these factors with physiological aspects of coffee. This study was conducted in a full sun coffee field, where coffee plants were associated with grevilea during dry and rainy seasons. The experiment had two treatments and six replicates, and the resulting averages were compared by a t test at 5% of probability, comparing the systems and seasons. There was a rise in spore number in the dry season. Also the rate of root colonization of AMF was higher in intercropped cultivation but it did not differ between seasons. The shading of coffee plants in dry season promoted a raise of leaf Spad index. In the rainy season the leaf water potential had higher absolute value.
Grevillea robusta A. Cunn.; Coffea arabica L.; mycorrhizal
