Báo cáo lâm nghiệp:"Long-term effects of vegetation control

Báo cáo lâm nghiệp:"Long-term effects of vegetation control treatments for release of Engelmann spruce from a mixed-shrub" pdf

... backpack sprayers would be $743 ha –1 . While no data are available for aerial applications in the Nelson Forest Region for year 2000, the average cost of aerial herbicide application for the province of ... stands and achievement of free-growing requirements. A study was established in 1991 to examine the effectiveness of vegetation control treatments for release o...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp: "The effects of summer exposure to ozone on the frost hardiness after the vegetation period of Norway and Sitka spruce seedlings" doc

... measured conductivity values, the rate of change in conductivity or normalised leakage rate (k) was calculated. A comparison of k values with visible damage showed for both species of spruce ... USDA Forest Service and the US Environmental Protection Agency, as part of the National Acid Precipita- tion Assessment Program. References Barnes J.D....

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: "The effects of flooding and Phytophthora alni infection on black alder" pps

... presence of yellowing, small and sparse foliage. e collars and basal portions of the stems were thickened, apparently as a result of the formation of a higher proportion of aerenchyma tis- sues. ... vertical length of the necroses that developed on the stems were measured. Additionally, the rate of chlo- rotic foliage of each plant was evaluated on a scale of 1–5...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: " The effects of cutting regimes on natural regeneration in submountain beech forests: species diversity and abundance" pdf

... Carpinus Acer a a a a a a a a a a a a a a a a a a a a b b bb b b b Treatment Fagus Abies Tilia Quercus Carpinus Acer Count (individuals/m 2 ) J. FOR. SCI., 54, 2008 (12): 533–544 535 ecosystems that ... Initial phase of natural regeneration of beech forests in the national nature reserve of Voděradské bučiny. In: KUPKA I. (ed.), Proceedings of Natural and Artiﬁc...

Ngày tải lên : 07/08/2014, 10:22

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Báo cáo lâm nghiệp: " Differential effects of N, P and K on photosynthesis and partitioning of N in Pinus pinaster needles" pptx

... whereas A max was unaffected – an argument against any lasting role of A max in the growth response. Concentrations of N, P, and K were maintained within a relatively small range, and there was ... was performed with a Bio-Rad N, P, K and photosynthesis of maritime pine 5 same on mass and area bases. Data are presented solely on a mass basis for ease of comparison with n...

Ngày tải lên : 08/08/2014, 00:21

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Báo cáo lâm nghiệp: "Interactive effects of irradiance and water availability on the photosynthetic performance of Picea sitchensis seedlings: implications for seedling establishment under different management practices" ppt

... potential and hydraulic conductance determinations Dark respiration rates, A max and leaf water status at a saturating irradiance (200 µmol photon m –2 s –1 ) were determined at predawn and midday ... irradiance and water availability is particularly relevant to the establishment of out-planted seedlings in CCF compared to clearfell/re-forestation management systems. The impact...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Interactive effects of phosphorus and light availability on early growth of maritime pine seedlings" pptx

... were measured. The area and area-to-mass ratio of individual euphylls were subsequently calculated. The total euphyll area was esti- mated from the area-to-mass ratio of individual euphylls and ... 10.1051/forest:2005050 Original article Interactive effects of phosphorus and light availability on early growth of maritime pine seedlings Alissar CHEAÏB a *, Alain MOLLIER a...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp:"The relationship between vegetation management and the wood and pulping properties of a Eucalyptus hybrid clone" pdf

... cooks and interpolate to the desired 20 Kappa number Table II. Summary of analyses of variance and treatment means for the slopes of growth rate for stem area. Summary of analysis of variance Source ... sub-tropical, with a mean annual rainfall and temperature of 1144 mm and 22 °C respectively. The trial was located at an elevation of 45 m on an east facing slope. Soil par...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp: "The effects of thinning on the structural diversity of coppice forests" doc

... Moderate Heavy a b b a b b a b c b a a a b b a b c Plot – level variables TDh3Light Moderate Heavy a b c a a a a a a a a a a ab b a a a TDd3Light Moderate Heavy a b b a a a a a a a a a a a a a a a FHD Light ... Moderate Heavy a a a a a a a a a a a a a a a a ab b Treatments with the same letter indicate non significant differe...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: "The effects of lifting on mobilisation and new assimilation of C and N during regrowth of transplanted Corsican pine seedlings. A dual 13C and 15N labelling approach" docx

... of transplanted Corsican pine seedlings. A dual 13 C and 15 N labelling approach Pascale MAILLARD a *, Didier GARRIOU a , Eliane DELÉENS b , Patrick GROSS a , Jean-Marc GUEHL a a UMR INRA-UHP ... (day 0) and the last day of the chase period (day 41) depended on a proportion of labelled C incor- porated before transplanting (X c ; old C) and of unlabeled C assimi- lated...

Ngày tải lên : 08/08/2014, 01:22

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