Cover crop species and mycorrhizal colonization on soil phosphorus dynamics

Phosphorus (P) plays an important role in the physiological plant processes; however, tropical soils, P is one of most limiting nutrients for crop yield due to its low mobility, determined by adsorption this element soil. To enhance P-use and P-acquisition efficiency, research aimed evaluate effect cover crops mycorrhizal colonization on changing soil fractions, both organic inorganic. A complete randomized block design was adopted a field experiment, with four replications using crops: i) pigeon pea ( Cajanus cajan ); ii) crotalaria Crotalaria juncea iii) millet Pennisetum glaucum iv) brachiaria Brachiaria ruziziensis ) v) fallow, as control. The arbuscular fungus colonization, fungal spore density, fractionation, N, P, K uptake were assessed. Our results show that affected cycling deeper layers. Cover may increase inoculum potential succeeding rotation or intercropping, when used green manure.