Resumo -O estudo teve como objetivo apresentar o efeito dos tratamentos silviculturais com vista a melhorar a produtividade das matas de mecrusse (Androstachys johnsonii Prain, 1. c.), no Distrito de Mabote, Província de Inhambane, Moçambique. Foi estabelecido um ensaio com delineamento inteiramente casualizado, constituído por um grupo de três parcelas (20 m x 50 m) e três tratamentos (Controle -C, fitossanidade -F e Desbaste -D). Os resultados mostraram que os tratamentos silviculturais influenciaram positivamente no crescimento. O incremento periódico anual (IPA) observado no período em análise foi de 1,22 mm ano -1 em todos os tratamentos. Observou-se um IPA de 1,3 mm nos tratamentos desbaste e fitossanidade e 0,9 mm ano -1 para o tratamento controle. As intervenções feitas não afetaram a estrutura dos povoamentos, uma vez que a distribuição diamétrica observada permaneceu j-invertido.Termos para indexação: Tratamentos silviculturais, desbastes, crescimento. Effect of silvicultural treatments in the mecrusse ecosystem in Mabote, Inhambane Pronvice, MozambiqueAbstrat -This study aimed to show the effect of silvicultural treatments to improve the health and productivity of forests mecrusse (Androstachys johnsonii Prain, 1. c.), in the Mabote District of Inhambane province. The experiment design was based on a complete randomization design, comprising of a group of three plots (20 m x 50 m) and three treatments (Control -C, phytosanity -P and thinning -T). The results showed that the silvicultural positively treatments influenced the health and growth. The periodic annual increment (PAI) observed during the period under review was 1.22 mm year -1 . There was an PAI of 1.3 mm for the treatment phytosanity (P) and thinning (T), and 0.9 mm year -1 for the control plots. The interventions did not affect the structure of the stands for the diameter distribution since remained the j-reverse shape.
The seedlings production process of forest plant species is found to be an important stage in the forest-based production chain. The present work was conducted in commercial nurseries aiming to assess morphological parameters of Eucalyptus clonal seedlings in the expedition phase. The experiment was performed in two nurseries located in the southern part (Nursery #1) and slopes' field (Nursery #2) of the State of Minas Gerais, Brazil. The Completely Randomized Design was used, with four treatments or clones (AEC 144 -Eucalyptus urophylla, AEC 244 -Eucalyptus urophylla, AEC 1528 -hybrid of E. urophylla x Eucalyptus grandis and AEC 100 -hybrid of E. urophylla x E. grandis), seven replications and 16 seedlings per plot. Seedlings were produced in 54 cm 3 tubetes according to nurseries protocols. The following parameters were assessed: plant height, collar diameter, dry matter, and seedlings quality index. The Sisvar statistical analysis system was run for Analysis of Variance, and averages were compared by means of Scott-Knott test at 5% significance. The clone AEC 1528 showed better quality standards at the Nursery #1, and clones AEC 100 and AEC 244 showed greater height and collar diameter at the Nursery #2. Therefore, seedlings from commercial nurseries under study showed adequate morphological quality standards for expedition and planting.
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