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Crescimento inicial e absorção de fósforo e nitrogênio de Enterolobium contortisiliquum inoculada com fungos micorrízicos arbusculares

2018; Sociedade de Ciências Agrárias de Portugal; Volume: 41; Issue: 1 Linguagem: Inglês

10.19084/rca17138

2183-041X

Gustavo Mattos Abreu, Jolimar Antônio Schiavo, Phillipe Mattos Abreu, Gabrielly dos Santos Bobadilha, Jean S. Rosset,

Soil Management and Crop Yield

Enterolobium contortisiliquum is a leguminous tree that associates by symbiosis with arbuscular mycorrhizal fungi (AMF) and can be used to recover degraded areas. Therefore, the aim of this work was to evaluate the effects of AMF inoculation, supply of phosphorus (P), and rate of nitrogen (N) and P absorption in E. contortisiliquum. The variables were analyzed into randomized blocks with factorial design 5 x 3, in which the factors were levels of P (0, 50, 100, 200, and 400 mg kg-1), and inoculation with AMF (Gigaspora margarita and native population in soil), or non-inoculation (control treatment), with four repetitions in each treatment. The highest mycorrhizal colonization (35%) occurred in seedlings inoculated with G. margarita. Plants inoculated with G. margarita and under P supply of 0 and 50 mg kg-1 exhibited increase in height of 19.5% and 7.4%, respectively, compared to the control treatment. P levels in aerial part of plants inoculated with G. margarita, under levels of 0, 50, 100 and 400 mg kg-1of P presented high increment of 198%, 108%, 181% and 106%, respectively, compared to the control. The control treatment, without any P supply, seedlings inoculated with G. margarita exhibited high colonization efficiency (34.89%) and high mycorrhizal dependence (25.53%).