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Copyright of Ciência Florestal (01039954) is the property of Ciencia Florestal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Colombiana de Biotecnología is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Neotropical Biology & Conservation is the property of Pensoft Publishers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Ten percent of the world’s forest consists of plantations, yet these plantations supply 37% of the world’s timber. While plantations proliferate, local communities are looking for suitable native species to cultivate in plantations. This paper is a component of a larger project—trying to restore degraded areas with native plantations in ways that would financially benefit the surrounding communities. Growth equations have been constructed for ten native tree species, using 12 years of growth data from research plots in La Selva Biological Station, Costa Rica. Interpolative growth equations for Terminalia amazonia (J. Gmell) Exell., Virola koschnyi Warb., Dipteryx panamensis (Pittier) Record & Mell, and Hieronyma alchorneoides Allemao were constructed. A maximum sustained yield approach was used to determine the other six species’ rotation age and the merchantable volume produced per hectare at time of harvest. In single-species plantations, Jacaranda copaia (Aubl.) D. Don., Vochysia guatemalensis Donn. Sm., and Vochysia ferruginea Mart. were the most productive species and, thus, are the recommended plantation species for the humid lowlands of Costa Rica. The data for this experiment suggest J. copaia has an ideal rotation age of 6.5 years, at which time the yield will be 255 m3/ha. V. guatemalensis has a rotation age of 13.5 years producing 417 m3/ha, and V. ferruginea has a rotation age of 13.3 years producing 363 m3/ha.J. copaia and V. guatemalensis grew significantly faster in mixed plantations than in pure plantations. A mixed-species plantation comprised of J. copaia, V. guatemalensis, and Calophyllum brasiliense Cambess produces 21% more total volume of merchantable timber than a pure plantation of J. copaia, which grows the fastest of the three species. Restoring abandoned agricultural sites with V. guatemalensis will yield the most timber to landowners after one rotation. [Copyright &y& Elsevier]

A total of 3029 cuttings were harvested from coppiced stumps of 96 trees representing six provenances of Vochysia guatemalensis. There was significant variation in diameter between provenances with tree stumps from La Ceiba in Honduras being the largest with a mean of 13.4 cm compared with 10.5 cm for Siquirres in Costa Rica. Regression analysis was utilised to determine the influence of provenance and diameter on the numbers of coppice shoots produced by each tree and the subsequent rooting ability of cuttings taken from them. Significantly more shoots and cuttings were produced on trees with larger diameters. There was also a significant provenance influence on shoot and cutting production. The fitted regression model predicted a difference of 20 cuttings from stumps of the same diameter between provenances Florencia, Costa Rica and La Ceiba, Honduras. In contrast to the positive effect of large stump diameter on the number of cuttings produced, the rooting ability of cuttings was negatively influenced by the diameter of the stump. The average rooting percentage of cuttings from individual provenances varied between 30% and 70% with an overall rooting percentage of 64%. The implications of these results for commercial vegetative propagation programmes are discussed. [ABSTRACT FROM AUTHOR]