Desempenho de mudas de gravioleira inoculadas com fungos micorrízicos arbusculares em solo não-esterilizado, com diferentes doses de fósforo

Performance of soursop seedlings inoculated with arbuscular mycorrhizal fungi in non-sterilized soil, with different phosphorus doses. The objective of this work was to evaluate the development of soursop (Annnona muricata L.) seedlings inoculated with arbuscular mycorrhizal fungi (AMFs) cultivated with different doses of phosphorus (P). The experiment was carried out in a greenhouse with a completely randomized factorial design (4 x 4), with non inoculated plants (controls), three species of arbuscular mycorrhizal fungi, Glomus darum?, Gigaspora margarita and native AMFs (Glomus macrocarpum, G. etunicatum and Entrasphopora colombiana) and four doses of P (0, 25, 50, 100 mg kg(-1)) with three replications. The seedlings were cultivated in plastic bags of 2 dm(3) in a mix composed of non-sterilized soil, and sand (2:1 v v(-1)). After 90 days, it was observed that AMFs inoculation promoted an increment in height and stern diameter, increased biomass and P content of shoot and roots, and K content in the roots of the seedlings in comparison with controls. The non inoculated plants did not respond to phosphorus fertilization, concluding that the inoculation with AMFs with phosphate fertilization increased growth and nutritional state of soursup seedlings even when cultivated in non-sterilized soil.