Báo cáo lâm nghiệp: "Résultats préliminaires concernant la mycorhization contrôlée de vitroplants de chêne (Quercus robur L " pptx
Báo cáo lâm nghiệp: "Résultats préliminaires concernant la mycorhization contrôlée de vitroplants de chêne (Quercus robur L." pptx
... s’agit de : Laccaria laccata Hebeloma cru.rtuliniforme Paxillus involutus Suillus granulatus La préparation de l inoculum a été faite selon la technique mise au point par F. LE TACON ... trace de milieu de culture, puis ils sont transplantés sur le mélange tourbe vermiculite inoculé avec le champignon. Les récipients de culture (bocaux de 1...
Ngày tải lên: 09/08/2014, 06:22
Báo cáo lâm nghiệp: "Résultats préliminaires concernant la mycorhization contrôlée de vitroplants de chêne (Quercus robur L.)" pps
... proximale de la tige est toujours plus faible que celle de la partie distale, ce résultat contraire aux notions classiquement admises selon lesquelles les portions les plus ... du chêne vert (Quercus ilex L. ) Michèle L HELGOUAL’CH, H. ESPAGNAC Michèle L HELGOUAL’CH, des Sciences, Laboratoire de Bio H. ESPAGNAC logie végétale expérime Facult...
Ngày tải lên: 09/08/2014, 06:22
Báo cáo lâm nghiệp: " Sicily represents the Italian reservoir of chloroplast DNA diversity of Quercus ilex L. (Fagaceae)" pptx
... italien de la diversité de l ADN chloroplastique de Quercus ilex L. Le polymorphisme de l ADN chloroplas- tique a été analysé chez 44 populations italiennes de chêne vert. Les résultats obtenus avec ... l hypothèse d’un refuge glaciaire existant dans le Sud de l Italie et soulignent la grande importance de la conservation des populations d’arbres en Sicile dans lesq...
Ngày tải lên: 08/08/2014, 00:21
Báo cáo lâm nghiệp: "Etude comparée des potentialités hivernales d’assimilation carbonée de trois conifères de la zone tempérée (Pseudotsuga menziesii Mirb., Abies alba Mill. et Picea excelsa Link.)" ppt
... cellulaire liée à la formation de glace dans les espaces interccllulaires. A l intérieur de ce groupe on note une grande variabilité des niveaux de résistance selon la ... CO! des espaces intercellulaires aux sites de carboxylation dans les chloroplastes et de la résistance biochimique à la carboxylation a été calculée d’après la for...
Ngày tải lên: 09/08/2014, 06:21
Báo cáo lâm nghiệp: "The proposal of biotic hazard zones in selected spruce dominated regions in Slovakia" pptx
... subsequent felling should help concentrate the bark beetle population to the minimal volume of trees. e problem is the enormous volume of trees which should be felled in the next years to control the ... recommend intensive felling mainly in the first 1–3 years to eliminate the bark beetle popu- lation. e intensity of felling may decrease later. e primary goal in zone B is to minimize/...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "derivation of target stocking for forests of norway spruce vegetation zone in slovaki" pptx
... appearance). For practical needs of general and detailed planning less detailed classification of forests into aggregated degrees of naturalness was proposed, complemented by Ks (1989) classification ... and simultaneously fulfilment of other func- tions; in protective forests mainly fulfilment of publicly beneficial (ecological and social) functions (M 1994). G (1989) consid...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Comparison of general tree characteristics of less known oak species Quercus dalechampii Ten. and Quercus polycarpa Schur" pot
... mark- edly petiolate leaves; the lamina is elliptic or elliptic- lanceolate, largest in the bottom half with pointed lobes and elongated upper part (K 1990; M 2006). Tough-sided cupules ... Med., Galium sylvaticum L. , Hepatica nobilis Schreber, Asarum europaeum L. , Stellaria holostea L. and Origanum vulgare L. were the most dominant species in the herb layer. In total, 48...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "The evolution of natural floodplain forests in South Moravia between 1973 and 2005" pptx
... rela- tively stable vernal aspect. Species such as Anemone nemorosa, Corydalis cava, Ficaria calthifolia, or even Primula veris, Scilla drunensis, and Galanthus nivalis, which are crucial ... (Ranšpurk). The soils are mostly classified (A 1998; D et al. 2001; M et al. 2006) as Gley-Eutric Fluvisols or Eutric Fluvisols, less frequently as Eutric Gleysols (lower parts...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Health status of forest stands on permanent research plots in the Krkonoše Mts" pptx
... classes but also on the ob- servation of average defoliation (it was always calcu- lated as the average value of defoliation of all living trees) and/or average foliage (calculated for all trees ... continued until 1988; in 1988–1995 the foliage relatively sta- bilized, but there occurred smaller or larger oscil- lations, particularly in 1989, 1992, and 1995. After 1996 massive defoliation...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "New insights in the recognition of the European ash species Fraxinus excelsior L. and Fraxinus angustifolia Vahl as useful tools for forest management" pdf
... à la détection de la présence de F. angus tifolia à l échelle populationnelle, dans des lots de graines ou de semis, ainsi que dans des échantillons de feuilles d’arbres adultes issus de populations ... frêne oxyphylle (F. angustifolia Vahl) sont les deux espèces de frêne les plus répandues en Europe occidentale. Le frêne commun étant le seul à posséder une importante valeu...
Ngày tải lên: 07/08/2014, 16:20