Tectona grandis

Local and Regional Environmental Variation Influences the Growth of Tropical Trees in Selection Trials in the Republic of Panama

background

This study evaluates the effect of varying site conditions on the basal area of 21 neotropical and 2 exotic tree species at three different sites in Panama. 

Research Goals & Methods

Seedlings were planted in 2003 in randomized blocks and measured for basal diameter, height, live crown length, and crown diameter each year from 2004 to 2006.

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Especies para reforestación en Nicaragua (Species for Reforestation in Nicaragua)

Background

This manual provides information about multipurpose trees in Nicaragua.

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Restoration of dry tropical forests in Central America: A review of pattern and process

Background

Much information on restoration and management exists for wet tropical forests of Central America but comparatively little work has been done in the dry forests of this region. Such information is critical for reforestation efforts that are now occurring throughout Central America. This paper describes processes of degradation due to land use and provides a conceptual framework for the restoration of dry tropical forest, of which less than 2% remains intact.

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Can Native Tree Species Plantations in Panama Compete with Teak Plantations? An Economic Estimation

background

Panama has high rates of primary forest conversion, resulting in depleted timber resources. In response, the timber plantation industry is growing to meet demand, often with non-native species. This study compares the economic feasibility of using native tree species vs non-native species for plantation forestry.

Open access copy available

Initial Performance and Reforestation Potential of 24 Tropical Tree Species Planted Across a Precipitation Gradient in the Republic of Panama

background

The authors of this study  planted trees from 22 native species and two exotic species to use in selection trials testing the growth and survivability of trees in plantations in three different sites.

Research Goals & Methods

The sites were chosen for their precipitation gradient from Soberania National Park (2226mm mean annual rainfall), Los Santos (1946mm rainfall), and Rio Hato (1107mm rainfall). Survival, basal diameter, height, crown diameter and wood volume index (VI) were calculated after two years of growth.

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Forestry Project for the Basin of the Chinchiná River, an Environmental and Productive Alternative for the City and the Region

Background

Over the last century, Andean watershed within Colombia has faced threats of uncontrolled deforestation, which have been driven by a rapid expansion of agriculture and cattle grazing. It is imperative that these trends be halted and reversed, thus the FAO proposes the reforestation of watersheds, which will improve the regulation of hydaulic flows to populations living in and downstream from river basins. This project planning document describes one of these programs, PROCUENCA-FAO, which began in 2001 and focuses on the Chinchiná River watershed. 

Open access copy available

A Financial Analysis of Small-Scale Tropical Reforestation with Native Species in Costa Rica

Background

This article describes the financial expenses and revenues incurred by the 15th year of a small native species plantation in Costa Rica.

research goals & methods

Forecasting models incorporate growth patterns, production costs, and wood prices to determine the net present value and internal rate of return for the project.

Open access copy available

Native Species: A Resource for the Diversification of Forestry Production in the Lowland Humid Tropics

background

This research evaluates the success of native species for reforestation plantings in Costa Rica in comparison with exotic species.

Research Goals & Methods

At La Selva Biological Station, 80 species were planted in mixed stands of 8-12 species between 1987 and 1990. Growth characteristics and form for timber quality were collected for each species at 3 and 6 years after planting.

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Between and Within-Site Comparisons of Structural and Physiological Characteristics and Foliar Nutrient Content of 14 Tree Species at a Wet, Fertile Site and a Dry, Infertile Site in Panama

background

This study seeks to analyze how stress resulting from different amounts of precipitation and soil nutrients affects tree growth. The study hypothesized that tree structure and physiology as well as foliar nutrient content would be significantly different between the sites, and trees at the wet, fertile sites would perform better. Secondly, the study hypothesized finding a greater variability of integrated tree growth at the drier site, as plant stress is expected to accentuate differences in performance. Lastly, it was hypothesized that leaf mass area and foliar N would predict photosynthetic capacity.

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Impacts of Herbicide Application and Mechanical Cleanings on Growth and Mortality of Two Timber Species in Saccharum spontaneum Grasslands of the Panama Canal Watershed

background

This study evaluates the effectiveness of weed control treatments (herbicide application and mechanical cleanings) in promoting the growth and survival of the exotic tree species Tectona grandis and the native tree species Terminalia amazonia.

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