TAILIEUCHUNG - Báo cáo khoa học: "Photosynthesis, leaf area and productivity of 5 poplar clones during their establishment year"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài:"Photosynthesis, leaf area and productivity of 5 poplar clones during their establishment year. | Ann Sci For 1994 51 613-625 Elsevier INRA 613 Original article Photosynthesis leaf area and productivity of 5 poplar clones during their establishment year TS Barigah 1 B Saugier2 M Mousseau 2 J Guittet2 R Ceulemans 3 11NRA Station de Recherches Forestieres BP 709 97387 Kourou cedex 2 University de Paris XI Laboratoire d Ecologie Végétale Centre d Orsay Bailment 362 91405 Orsay cedex France 3 Université d Anvers Departement Biologie UIA Universiteitsplein 1 B-2610 Wilrijk Belgium Received 3 November 1993 accepted 24 March 1994 Summary The stem volume and biomass stem branches production net photosynthesis of mature leaves and leaf area production of 5 poplar Populus clones Populus trichocarpa X deltoides Raspalje and Beaupre Populus X euramericana Robusta and p trichocarpa Columbia River and Fritzl Pauley were studied during the first year of growth in an experimental high density plantation 15 600 plants ha 1 . Significant differences were found in volume production woody biomass production total leaf area and net photosynthesis. Above-ground biomass production was times higher in Raspalje than in Robusta. The best performing clones Raspalje Beaupre were those with large leaves high leaf area index and high photosynthetic rates. A positive relationship between leaf photosynthetic capacity and above-ground biomass production was also noted for 4 of the 5 clones. The euramerican clone Robusta was an exception showing high photosynthetic rates but low biomass production. This discrepancy was mainly due to the lower leaf area of this clone and possibly also due to a larger carbon allocation to below-ground biomass Barigah 1991 . The root shoot ratios at the end of the first season in the clones Raspalje and Robusta were and respectively. net photosynthesis leaf area biomass production Populus Resume Photosynthèse surface foliaire et productivité de 5 clones de peuplier dans leur premiere année. Des plants issus de boutures de 5 clones de peuplier Populus

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