Avalia o nutricional de mudas de Acacia mangium, Sesbania virgata e Eucalyptus camaldulensis inoculadas com fungos micorr赤zicos, em casade- vegeta o e em cava de extra o de argila = Nutritional evaluation of Acacia mangium, Sesbania virgata and Eucalyptus camaldulensis, inoculated with mycorrhizal fungi, grown under greenhouse conditions and in an area of clay extraction

作者：Jolimar Antonio Schiavo; Marco Antonio Martins; Luciana Aparecida Rodrigues

来源：Acta Scientiarum - Agronomy, 2009.

• monocultivo
• consorcio
• estado nutricional
• micorriza
• rizobio
• single planting
• intercropping
• nutritional status
• mycorrhiza
• rhizobium

O presente trabalho objetivou avaliar o efeito de fungos micorr赤zicos arbusculares (FMAs) na nutri o de mudas de ac芍cia (Acacia mangium Willd.), sesbania (Sesbania virgata (Cav.)Pers.) e eucalipto (Eucalyptus camaldulensis Dehnh.) em casa-de-vegeta o, bem como a influ那ncia dos FMAs, do monocultivo e/ou cons車rcio sobre os teores dos nutrientes nas folhas das plantas em cava degradada pela extra o de argila. Em casa-de-vegeta o, mudas de ac芍cia inoculadas com FMAs tiveram incrementos nos conte迆dos de N, P e Zn de 22, 71 e 67%, respectivamente; as de sesbania, de 39, 49, 56, 24, 105 e 54%, respectivamente para N, P, Ca, Mg, Mn e Zn. Na cava de extra o de argila, plantas de ac芍cia consorciadas com sesbania apresentaram menor teor de Ca nas folhas. Ainda, no cons車rcio com eucalipto, plantas de ac芍cia inoculadas com FMAs tiveram incrementos de 36% no teor de Mg, em rela o 角s sem inocula o. Plantas de sesbaniaconsorciadas com ac芍cia e/ou eucalipto apresentaram menor teor de Mg, em rela o 角s do monocultivo. Por outro lado, plantas de eucalipto consorciadas com ac芍cia e/ou sesbania sem FMAs apresentaram menor teor de N, em rela o 角s do monocultivo. At谷 o presente momento, n o foram observadas melhorias nutricionais em plantas de eucalipto advindas do cons車rcio com ac芍cia e/ou sesbania. This work aimed to evaluate, under greenhouse conditions, the effects of arbuscular mycorrhizal fungi (AMF) on the nutrient uptake of Acacia mangium, Sesbania virgata and Eucalyptus camaldulensis, as well as, the influence of these fungi on the shoot nutrient content of these plant species, when cultivated in single and intercropping systems, under field conditions in an area of clay extraction. Under greenhouse conditions, AMF inoculation increased N, P and Zn content of A. mangium by 22, 71 and 67%, respectively, and in S. virgata the increase of N, P, Ca, Mg, Mn and Zn was of 39, 49, 56, 24, 105 and 54%, respectively. Under field conditions, A. mangium, when cultivated together with S. virgata, presented lowest Ca content in shoots. AMF inoculation increased the Mg content in A. mangium by 36%, when the plants were grown together with E. camaldulensis. S. virgata plants in intercrop with A. mangium and/or E. camaldulensis presented lower Mg content than when cultivated in single system. On the other hand, E. camaldulensis plants without AMF inoculationcultivated together with A. mangium and/or S. virgata presented lower N content than the plants grown in single system. No nutritional improvement was observed in E. camaldulensis plants due to intercropping systems.