tailieunhanh - Báo cáo khoa học: "Growth, gas exchange and carbon isotope discrimination in young Prunus avium trees growing with or without individual lateral shelters"

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 .

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