Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: "Growth, gas exchange and carbon isotope discrimination in young Prunus avium trees growing with or without individual lateral shelters. | Ann Sci For 1993 50 353-362 Elsevier INRA 353 Original article Growth gas exchange and carbon isotope discrimination in young Prunus avium trees growing with or without individual lateral shelters c Collet 1 A Ferhi 2 JM Guehl 3 H Frochot 1 11NRA centre de Nancy laboratoire Lois de Croissance F-54280 Champenoux 2 Centre de recherches géodynamiques université Paris VI 47 avenue de Corzent F-74203 Thonon-les-Bains 3INRA centre de Nancy laboratoire de Bioclimatologie et d Ecophysiologie íorestières F-54280 Champenoux France Received 3 November 1992 accepted 5 February 1993 Summary One-yr-old wild cherry Prunus avium L plants were grown as follows 1 in small cylindrical shelters diameter 50 cm treatment S 2 in large shelters diameter 100 cm treatment L or 3 without shelter control treatment C during 1 growing season. Treatment c was characterized by higher values of photosynthetic photon flux density p and of leaf-to-air water vapour pressure difference A W than treatments L and s. The plants were taller in treatments L and s than in treatment c but biomass production was higher in the latter treatment. The plants of treatment c were also characterized by higher values of co2 assimilation rate A and of leaf mass per unit area LMA ratio of leaf mass to leaf area . Relative carbon Isotope composition 5p of the leaves was higher in treatment c than in treatments L and s which expresses higher time-integrated values of plant in-trinsinc water-use efficiency A g ratio in the former treatment. There was a positive correlation between 5p and LMA. Thus LMA a readily measurable parameter is a relevant parameter for understanding and modelling water-use efficiency of canopies. lateral shelter microclimate growth leaf gas exchange carbon isotope discrimination water-use efficiency leaf mass per unit area Résumé Croissance échanges gazeux et discrimination isotopique du carbone de jeunes merisiers Prunus avium L placés OU non dans des abris latéraux individuels. Des plants de .
