tailieunhanh - Báo cáo lâm nghiệp: "Productivity of Pinus elliottii, P. caribaea and their F1 and F2 hybrids to 15 years in Queensland, Australia"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Productivity of Pinus elliottii, P. caribaea and their F1 and F2 hybrids to 15 years in Queensland, Australia. | Ann. For. Sci. 64 2007 691-698 INRA EDP Sciences 2007 DOI forest 2007049 Available online at Original article Productivity of Pinus elliottii P. caribaea and their Fl and F2 hybrids to 15 years in Queensland Australia Mark DlETERSa c Jeremy BRAWNERb c a School of Land Crop and Food Sciences University of Queensland St Lucia QLD 4072 Australia b CSIRO-Ensis Cooroy Queensland Australia c CRC-Sustainable Production Forestry Hobart TAS 7001 Australia Received 29 October 2006 accepted 30 March 2007 Abstract - Growth data are presented to 15 years of age from a genetic study involving factorial matings within and between P elliottii var. elliottii and P caribaea var. hondurensis planted across three sites in southeast Queensland. Specific volume equations developed using the centroid method for each taxon site combination as well as a generic . conical volume equation were used to estimate the mean annual increment MAI at 10 and 15 years of age. MAI estimated using the conical volume equation were downwardly biased by 18 in P. elliottii but the bias was less than 2 in P. caribaea var. hondurensis and yielded different rankings of taxa at each site compared to the taxon site specific volume equations. At all three sites P caribaea var. hondurensis and the F1 and F2 hybrids significantly exceeded the productivity of P elliottii however differences between P caribaea var. hondurensis and hybrid pine were generally small. Assuming a realistic contribution of the three site-types to the population of deployment environments average MAIs for southeast Queensland were estimated as and m3 ha-1 y-1 for Pee Pch F1 and F2 respectively. hybrid superiority mean annual increment volume equations centroid method genetic gain Résumé - Productivité de Pinus elliottii Pinus caribaea et de leurs hybrides F1 et F2 à 15 ans au Queensland Australie . Des données de croissance jusqu à l âge de 15 ans ont été produites par des essais .

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