tailieunhanh - Báo cáo lâm nghiệp: "Effect of simulated acid rain on mycorrhizae of Aleppo pine (Pinus halepensis Miller) in calcareous soil"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế, đề tài:"Effect of simulated acid rain on mycorrhizae of Aleppo pine (Pinus halepensis Miller) in calcareous soil. | Ann Sci For 1996 53 947-954 Elsevier INRA 947 Original article Effect of simulated acid rain on mycorrhizae of Aleppo pine Pinus halepensis Miller in calcareous soil M Honrubia G Diaz Depto Biologia Vegetal Fac Biologia Univ Murcia Campus Espinardo 30100 Murcia Spain Received 19 October 1995 accepted 15 January 1996 Summary - Mycorrhiza formation and plant growth in particular root development of Pinus halepen-sis were studied in relation to the influence of pH from simulated rain in pot cultures. Four treatments of water and were established by adding a mixture of sulphuric and nitric acids 2 1 v v or 10 NaOH to distilled water. Three experiments were carried out I seedlings growing in calcareous forest soil II 2-year-old naturally mycorrhizal seedlings transplanted into vermiculite in order to differentiate old and new-formed roots and Hi seedlings growing in peat vermiculite inoculated with mycelial inoculum of Suillus collinitus. Although no visible effects on the aerial part were observed a reduction of root length in the most acidic treatment was noted. Enhancement of ectomycorrhizae formation was also recorded in this treatment in the three experiments. In substrata of neutro-basic pH short-term exposures to acid rain positively affected ectomycorrhizal fungi in particular Suillus species. acid rain mycorrhizae pH Pinus halepensis plant growth Resume - Effet du pH d une pluie acide simulée sur les mycorhizes de pin d Alep Pinus halepensis Miller sur sol calcaire. L effect du pH d une pluie simulée surla formation des myco-rhizes etsurla croissance de Pinus halepensis a été étudié. Les traitements de pH de I eau 7 5 6 0 4 on été établi par addition at eaudlstlllée de HSO-otHNO. 2 1 v v OU de NaOH 10 Trois essais ont été conduits i des plants sur sol forestier calcaire II plants ages de 2 ans naturel-lement mycorhizes transplantés dans la vermiculite pour differencier les racines préexistantes des racines nouvellement formees et Hi .