Báo cáo lâm nghiệp: "Lutte chimique contre le gui (Viscum al

Báo cáo lâm nghiệp: "Lutte chimique contre le gui (Viscum album L.). Pénétration, transport, efficacité de deux herbicides phloème-mobiles (2,4-DB et glyphosate)" pot

... lutte chimique contre le gui des feuillus (Viscum album album, BALL) a été envisagée à l aide de deux herbicides phloème-mobiles (2,4-DB et glyphosate) appliqués sur les feuilles ... (DPMlcm 2J s). Lutte chimique contre le gui (Viscum album L. ). Pénétration, transport, efficacité de deux herbicides phloème-mobiles (2...

Ngày tải lên : 09/08/2014, 02:20

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Báo cáo lâm nghiệp: "Ajustement d’un modèle hauteur-circonférence pour l’épicéa commun. Effet de la densité" pdf

... de 5 000 t/ha). Cette fois le mod le le plus complet a cinq para- mètres (μ 1 et μ 2 locaux, et μ 3 global : mod le m6 du tableau I). Les résultats ... étant qualitativement les mêmes pour les autres années). Statistiquement on ne déc le pas de dif- férences entre les modèles, le mod le le plus simple (les trois...

Ngày tải lên : 08/08/2014, 18:21

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Báo cáo lâm nghiệp: "Study of natural hybridization between Alnus incana (L.) Moench. and Alnus glutinosa (L.) Gaertn" pptx

... to a lesser extent to the size of a leaf blade. e correlation between absolute char- acteristics of an alder leaf testiﬁes to great genetic determination of the leaf shape, lesser dependence ... Přirození kříženci olše lepkavé (Al- nus glutinosa (L. ) Gaertn .) a olše šedé (Alnus incana (L. ) Moench .). Praha, Sborník Lesnické fakulty Vysoké školy zemědělské v Praze: 191–215...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Variability in density of spruce (Picea abies [L.] Karst.) wood with the presence of reaction wood" potx

... Verlag: 705. TRENDELENBURG R., 1932. Über die Eigenschaften des Rot- oder Druckholzes der Nadelhölzer. Allgemeine Forst- und Jagdzeitung, 108: 1–14. TRENDELENBURG R., 1939. Das Holz als Rohstoﬀ. ... (kg/m 3 ) 700 650 600 550 500 450 400 350 650 600 550 500 450 400 350 600 550 500 450 400 350 700 650 600 550 500 450 400 350 600 550 500 450 400 350 600 550 500 450 400 350 600 550 500 450...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Response of the Norway spruce (Picea abies [L.] Karst.) root system to changing humidity and temperature conditions of the sit" ppt

... horizontal skeletal roots (the Ip value decrease in HKK is smaller in all injured trees than the Ip value decrease for the whole root system; decreased was also the share of anchors in the Ip value ... between HKK). All the analyzed stands exhibi- ted an intolerably high occurrence of tangles – always smallest in healthy trees and showing a 100% presence in snags. All snags and nearly...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Extent and distribution of beech (Fagus sylvatica L.) regeneration by adult trees individually dispersed over a spruce monoculture" ppsx

... closest tree (“distance ), i.e. an explanatory variable, is simulated. Variables Table 1. Description of stands and sample plots Forest inventory Research plot Locality stand age density ( %) ... result of zoochory. Regeneration is utilizable as an optimal or at least acceptable method for creating the next economically valuable stands only in sections 1 and 2. In section 3 individual...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Leaf and whole-plant water relations of the Patagonian conifer Austrocedrus chilensis (D. Don) Pic. Ser. et Bizzarri: implications on its drought resistance capacity" ppt

... species: ( 1) lower osmotic potential; ( 2) more rigid cell walls (higher modulus elasticity); ( 3) less vulnerability to xylem cavitation: and ( 4) stronger sto- matal control over transpirational water ... formula: R total = – (ψ leaf – ψ soil) / u where ψ soil is soil water potential (estimated from predawn leaf water potential), ψ leaf is leaf water potential at midday, and...

Ngày tải lên : 08/08/2014, 00:21

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Báo cáo lâm nghiệp: "Water relations of cork oak (Quercus suber L.) seedlings in response to shading and moderate drought" ppt

... environment: low light level (LL = LL1 + LL2 < 16% of full sun light) and high light level (HL = HL1 + HL2 > 40% of full sun light). Similar groups were defined when regressions between Ψπ 100 ... highest values under the high light levels (HL1 and HL 2) and the lowest under the low light levels (LL1 and LL 2), seedlings could be arranged in two groups according to their response t...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp:"The d13C of Scots pine (Pinus sylvestris L.) needles: spatial and temporal variations" pps

... à l origine de cette variabilité. Les variations spatiales et temporelles de d 13 C aiguilles de Pinus sylvestris L. ont été étudiées pendant 17 mois (deux périodes de végétation) sur trois ... / Pinus sylvestris / needle / branch length effect / compression wood Résumé – Le d 13 C des aiguilles du Pin sylvestre (Pinus sylvestris L. ) : variations spatiales et temporel...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp:"Growth and biomass partitioning of Fagus sylvatica L. and Quercus robur L. seedlings in response to shading and small changes in the R/FR-ratio of radiation" pot

... two shade treatments (table I). The seedlings under the green nets were taller than those under the black coverage (table I, figure 2a). In contrast to almost all other variables, stem diameter ... Fagus sylvatica L. et de Quercus robur L. soumis à ombrage et à de faibles changements du rapport R/FR de radiation. On a testé l effet sur des plants de un an de hêtre (Fagus sylv...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp: "Lutte chimique contre le gui (Viscum album L ) Pénétration, transport, efficacité de deux herbicides phloème-mobiles (2,4-DB et glyphosate)" pot