Resumo

FALCON OCONOR, Emir; COBAS LOPEZ, Milagros; BONILLA VICHOT, Marta  e  RODRIGUEZ LEYVA, Orfelina. Survival of Swietenia mahagoni in the xerophytic corridor of the Guantánamo valley. Rev cubana ciencias forestales [online]. 2022, vol.10, n.1, pp. 93-106.  Epub 07-Abr-2022. ISSN 2310-3469.

The survival of Swietenia mahagoni obtained in nursery with the application of arbuscular mycorrhizal fungi (AMF) and different organic substrates was evaluated. Plants produced on two levels of substrates: cocoa husk, coconut fiber and composted pine sawdust in 6:2:2 and 2:6:2 ratios, and four levels of mycorrhizal strains: Glomus cubense, Rhizoglomus irregulare, Funneliformis mosseae and non-mycorrhizal, were used for a total of eight treatments. Plants in the field were distributed under a randomized block experimental design, with four replications per treatment; the planting frame used was 2 x 2 m. The plantation was done after 30 days and the survival was assessed monthly until 12 months. During this time, the morphological variables: height and diameter were registered, and the height to diameter ratio and the relative growth rate were calculated. Survival analysis was performed using the Kaplan-Meier estimator and proportional hazards regression was performed to determine the risk of mortality as a function of morphological variables. At 12 months after planting, an average survival rate of 86.30 % was obtained, with higher percentage for plants inoculated with Glomus cubense and Rhizoglomus irregularestrains in the substrate composed of 20 % cocoa husk + 60 % coconut fiber + 20 % sawdust. Diameter was the morphological variable most related to the risk of mortality in the planting sites.

Palavras-chave : Forest plantation; Reforestation; Substrate; Arbuscular mycorrhiza..

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