Báo cáo lâm nghiệp: " Estimation de l’accroissement et de la

Báo cáo lâm nghiệp: " Estimation de l’accroissement et de la production forestière à l’aide de placettes permanentes " pdf

... original Estimation de l’accroissement et de la production forestière à l’aide de placettes permanentes concentriques Jacques HÉBERT, Nils BOURLAND, Jacques RONDEUX* Faculté universitaire des Sciences ... placettes circulaires uniques de rayon fixe (18 m) équivalentes à la plus grande des placettes concentriques. De cette manière, nous avons pu procéder...

Ngày tải lên: 08/08/2014, 00:21

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Báo cáo lâm nghiệp: "Évolution du potentiel hydrique et du système racinaire de et jeunes plants de cèdre, pin laricio de Corse pin noir plantés à l’automne et au printemps" pdf

... sensibilité à la plantation à racines nues. Mais, ces taux de survie importants amènent à penser que les fortes

Ngày tải lên: 09/08/2014, 06:21

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Báo cáo lâm nghiệp: "The results of manipulated experiments with inoculation of Ips typographus (L., 1758) to spruce trees under various levels" potx

... However, no statistical relation was found between forest decline symptoms and bark beetle attacks in study of P et al. (1996). Several studies have been performed in order to assess the factors ... necessary to repeat manipulated experiments with higher number of inoculated beetles and on diﬀerent po- sition on the trees (on stem under canopy). Acknowledgements We particularly tha...

Ngày tải lên: 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "An economic aspect of conversion of Scots pine (Pinus sylvestris L.) stands in the Polish Lowland" docx

... P et al. 2000; G-  et al. 2008). e aim of this study was to determine optimal dates of conversion of Scots pine stands growing at unsuitable sites in conditions of the Polish Lowland. ... stands but these relationships get reversed at older age. – e mean value of pine stands from unsuitable sites increases only to the age of 80 years and later on this value decreases...

Ngày tải lên: 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Germination of acorns and development of oak seedlings (Quercus robur L.) following flooding" pot

... T.T., PALLARDY S.G., 1997. Growth Control in Woody Plants. San Diego, Academic Press. KÜHNE C., BARTSCH N., RÖHRIG E., 2005. Waldbauliche Behandlung der Auenwälder am Oberrhein unter beson- derer ... Berücksichtigung der Stieleiche (Quercus robur L.). Schriften aus der Forstlichen Fakultät der Universität Göttingen und der Niedersächsischen Forstlichen Ver- suchsanstalt, 140. LARSEN H.S.,...

Ngày tải lên: 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Merocoenoses of cambioxylophagous insect fauna of Norway spruce (Picea abies [L.] Karst.) with focus on bark beetles (Coleoptera: Scolytidae) and types of tree damage in diﬀerent gradation conditions" ppsx

... the tree death.  e area with an epidemic population of I. typographus is characterized by a much narrower species spectrum compared to that with an en- demic population of the beetle. It ... (ed.):  e Development of Biotic Communities after Windthrow. Landsberg, Ecomed: 292–314. S F. (1955): Pathogenese der Borkenkäfer- Epidemie 1946–1950 in Nordwest-deutschland. Schrifte...

Ngày tải lên: 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Soil environment and nutrient status of Norway spruce (Picea abies [L.] Karst.) underplantings in conditions of the 8th FAZ in the Hrubý Jeseník Mts" potx

... by the calcu- lated statistically signiﬁ cant correlation between the foliar content of N and P and the degree of damage to underplantings caused by nutrient de ciency.  e degree of damage ... et al. (2003), who demonstrated a correlation between the crown de- foliation and sulphur deposition levels at the end of Table 6.  e matrix of correlation coeﬃ cients between selected elemen...

Ngày tải lên: 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Polyamines during somatic embryo development in Norway spruce (Picea abies [L.])" potx

... are considered to be a new class of plant hormones implicated also in the regulation of somatic and zygotic embryogenesis (K et al. 1998; S et al. 2004). PAs have a wide spectrum ... only were desiccated. e embryos were carefully transferred on dry paper in small Petri dishes (3 cm in diameter). ese open dishes were placed into large Petri dishes (18 cm in diameter) wit...

Ngày tải lên: 07/08/2014, 10:21

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Báo cáo lâm nghiệp: " Possibilities of using rooted cuttings of European beech (Fagus sylvatica L.) for stabilisation of forest ecosystems" pptx

... International Plant Propagators’ Society, Vol. 53: 575–576. CORNU C. et al., 1977. Recherche des meilleures conditions d’enrancinement des boutures herbacées de chêne rouvre (Quercus petraea /M./ ... overlap, diﬀerences are statistically signiﬁcant Table 1. Diameter growth of large-sized plants of beech (plug 1.5 + 2 + 1) on Trutnov 2 PRP (planting in 1993, n = 95) Breast-height diam...

Ngày tải lên: 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Architecture of root branches of Norway spruce trees (Picea abies [L.] Karst.) growing in gley soil" pptx

... on a fluvio-glacial substrate (40%) that belongs to the vegetation unit Betuleto-Alnetum, and bilberry- spruce with fir (10%) that belongs to the vegetation unit Piceetum abietinum higher ... root-diameter class, but it was only 0.18 in the last root-diameter class. We found out an unproportionally higher relative value of the average number of root branches in the ﬁrst root diameter ....

Ngày tải lên: 07/08/2014, 10:22

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