Báo cáo lâm nghiệp: "Effects of high temperatures and ash on

Báo cáo lâm nghiệp: "Effects of high temperatures and ash on seed germination of two Iberian pines (Pinus nigra ssp salzmannii, P sylvestris var iberica)" pps

... Madrid, Spain (Received 1 June 1996; accepted 19 December 1996) Summary — The effect of high temperatures and ash on seed germination of two Iberian pines (Pinus nigra ... (Toole, 1973) and P nigra (Orlandini and Malcoste, 1972). P halepensis and P pinaster, two common Iberian pines, have been characterized as...

Ngày tải lên : 08/08/2014, 18:21

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Báo cáo lâm nghiệp: "Estimating the sustainable harvesting and the stable diameter distribution of European beech with projection matrix models" pdf

... distribution and, consequently, the long-term dynamics of the non harvested populations. On the other hand, and assuming that condition (C1) holds, conditions (C2) and (C3) can be rewritten by means of ... number of stems/ha of the population of trees increases exponentially over time (unless harvests * Corresponding author: i.lopez@upm.es are conducted), when λ 0 < 1 th...

Ngày tải lên : 07/08/2014, 16:21

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Báo cáo lâm nghiệp: "Macronutrients in tree stems and foliage: a comparative study of six temperate forest species planted at the same sites" pps

... depending on soil conditions [4, 7, 34, 35] as well as plant water consumption [5, 24]. High concentration of Ca in Norway spruce needles compared to the foliage of other coniferous species and silver ... foliar S concentrations. Ash and lime showed the highest S concentrations in stem wood, oak had a lower concentration, and birch and beech showed the lowest concentrations...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: "Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed" pps

... above-mentioned set of hydrographs shows a lower proportion of slow runoff (65–80%), higher proportion of accelerated runoff (17–30%) and a little lower proportion of rapid runoff (2–4%). e higher proportion ... 4.2% compared to the calibration period to 71.4% of total runoff. e set of hydrographs depicting peakflow rates between 20 and 60 ls –1 characterizes various...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Effects of nitrogen on the selection of food by Phyllobius arborator (Herbst)" pot

... nitrogen on population parameters of potato insects: abundance, population growth and within-plant distribution of the green peach aphid, Myzus persicae (Homoptera: Aphididae). Environmental ... increased consumption of food in the creation of a fat body in females of Lochmaea caprae (L.) Diﬀerences of imagoes in the consumption of food in particular variants cannot be...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Effects of spruce, beech and mixed commercial stand on humus conditions of forest soils" pdf

... found. DISCUSSION e most important factors at the formation of forest ﬂoor are: topography, climatic and microcli- matic conditions, edaphon, soil chemistry and forest stand or phytocoenosis composition ... biodiversity of forest ecosystems. us, through the composition of forest stands and methods of their growing we can aﬀect the condition and properties of the soil...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: " Effects of ectomycorrhizal inoculation and the type of substrate on mycorrhization, growth and nutrition of containerised Pinus pinea L. seedlings produced in a commercial nursery" docx

... 2. Effect of inoculation and the type of substrate on the concentration of nutrients in needles of containerised P. pinea seedlings. p/ v = peat/vermiculite (1:1, v:v); p/ pb = peat/pine bark ... vermiculite, sand or perlite for a better aeration, fixing pH levels not higher than 6 for the production of conifer seedlings. Nevertheless, Mediterranean pines like P. pinea...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: " Effects of site preparation with micro-basins on Pinus halepensis Mill. afforestations in a semiarid ombroclimate" potx

... use of different techniques of site preparation influenced the development of different types of vegetation. On the one hand, the specific composition of the twelve sampled plots was compared ... group of plots. Therefore, within the plots inventory we find species pre- ferring a particular orientation and which only appear in that specific orientation, whereas some species ap...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: " Effects of intensive versus no management strategies during an outbreak of the bark beetle Ips typographus (L.) (Col.: Curculionidae, Scolytinae) in the Tatra Mts. in Poland and Slovakia" ppsx

... no pest control, as a result of primary attraction to logs and stumps and forest edges in recently opened portions of stands [9]. Thus, the two different management approaches may have two ... any prior extensive wind damage. The proposed action of this type of abiotic factor is the elevation of stand susceptibility to insect attack in forest gaps or edges, and enhanceme...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Effects of artificial damage on the branching pattern of Nothofagus dombeyi (Nothofagaceae)" ppsx

... black filled and parent shoots are grey filled): t.1: clipping of the apex, t.2: clipping of distal buds and leaves, t.3: clipping of distal leaves, t.4: clipping of distal offspring shoot. A ... level of the parent shoot. On the other hand, clipping a complete distal offspring shoot at the peak of its extension period increased the length and number of nodes of anothe...

Ngày tải lên : 08/08/2014, 00:22

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