XI WORLD FORESTRY CONGRESS

Antalya, Turkey, 13 to 22 October 1997


VOLUME 2, TOPIC 9


    FOREST AND AGROFOREST BEHAVIOUR OF SWIETENIA MACROPHYLLA KING IN SELECT SUBSEQUENCES IN THE SIERRA MAESTRA, CUBA

    Adalberto Marrero Rodríguez 1, Arsenio Renda Sayous 1

    Swietenia macrophylla King, an introduced meliaceous species in Cuba, yielding premium wood, has performed satisfactorily in the Sierra Maestra, in its pure form in mixed stands in agroforestry systems. It has also demonstrated a highly important role in the conservation and improvement of mountain soils in various sub-watersheds, thanks to rapid growth, gaining between 1.23 m and 1.65 in height per year after six years from planting and releasing over 7.2 kg/year per tree macronutrient-rich leaf litter to the soil. The performance of this species at age six years is described and compared with that observed in certain other countries of Central America and the Caribbean.

    Keywords: Swietenia macrophylla, agroforestry, sub-watersheds, leaf litter, surface run-off.

    1 Instituto de Investigaciones Forestales de Cuba, Calle 172 No.1723 e/17-B y 17-C, Rpto. Siboney, Playa, C. de La Habana, Cuba.

    STUDY OF THE BEHAVIOUR OF SOIL REINFORCED WITH FIBRE AND CEMENT FOR THE STABILIZATION OF FOREST ROADS

    Carlos Cardoso Machado1, Amaury Paulo de Souza 1, Roberto Mauro de Almeida 2

    A sandy soil, geotechnically classified as gneiss saprolith, was collected at a slope near the Vila Secundino in the county of Viçosa, Minas Gerais State, Brazil. The soil in its natural state was mixed with plastic fibre and cement and studied for simple compression. The results of rupture and of resistance to simple compression on proof bodies of natural soil and of mixtures of soil-fibre and soil fibre cement are presented.

    1 Professor of the Federal University of Viçosa, Minas Gerais State, Brazil. Facsimile: (55 31) 3992478; E-mail: machado@mail.ufv.br

    2 Scholar of the National Research Council, CNPq, Brazil



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