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Wyszukujesz frazę "larch forest" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Relationship between forest canopy and natural regeneration in the subalpine spruce-larch forest (north-east Italy)
    Autorzy:
    Marchi, A.
    Paletto, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/38768.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    relationship
    forest canopy
    natural regeneration
    subalpine forest
    spruce-larch forest
    canopy closure
    canopy cover
    Italy
    Opis:
    The authors describe the difference between canopy cover (proportion of the forest floor covered by the vertical projection of the tree crowns) and canopy closure (proportion of sky hemisphere obscured by vegetation when viewed from a single point) and the respective ground-based estimation techniques focused on two types of densiometer (GRS tube and spherical). The data collected in the field were used to analyse the relationship between forest canopy and natural regeneration in two subtypes of subalpine larch-spruce forests. The results indicate that in the first subtype characterized by a high fertility and a high canopy cover (around 62%), the level of natural regeneration is low (115 stems per hectare) and it is nearly exclusively composed by spruce [Picea abies (L.) Karst.]. For the second subtype characterized by a low fertility and a medium canopy cover (around 49%) the natural regeneration is rather dense (650 stems per hectare). At last the authors evidence a insignificant difference between the data of forest canopy collected by different ground-based estimation techniques (+0.7% using spherical densiometer compared to using GRS tube densiometer).
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2010, 52, 1
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of slow-release fertilizers of Silvamix and Silvagen line on growth of a young spruce and larch forest plantation three years after application
    Autorzy:
    Stofko, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/38627.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    fertilizer
    Silvamix fertilizer
    Silvagen fertilizer
    plant growth
    young plant
    spruce forest
    larch forest
    forest plantation
    fertilizer application
    Opis:
    This work evaluates effects of tablet fertilizers Silvamix, Silvamix Mg and Silvagen on height and diameter growth of a young plantation of Norway spruce [Picea abies (L.) Karst.] and European larch (Larix decidua Mill.) after the third year of fertilizer application. The experiment was conducted on one experimental plot in the Low Tatra Mountains. The fertilizers were applied at a rate five tablets (50 g) per each tree, considering not treated trees as the control. The tablets were laid on the ground and thoroughly trodden into soil. ANOVA analysis did not reveal any significant effects of fertilizers on height and diameter growth of Norway spruce trees. The use of Silvagen resulted in significant effects on height growth of larch trees.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2010, 52, 1
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forest plantation productivity - soil interactions within Western Forest-Steppe of Ukraine: effects of pH and cations
    Autorzy:
    Raspopina, Svitlana
    Debryniuk, Yuriy
    Hayda, Yuriy
    Powiązania:
    https://bibliotekanauki.pl/articles/2041494.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    forest plantation
    larch
    spruce
    oak
    potential acidity
    absorbed bases
    movable aluminium
    Opis:
    Dark grey podzolized soils on the loess like loams, which are represented in the soil cover within fresh and humidity gradients in the Western Forest Steppe of Ukraine, are characterized by high forest vegetation potential, which ensure the formation of mostly pure and mixed larch and spruce stands with high level of the productivity. Despite the fact that both species are coniferous, their effect on the soil, in particular, on its acid-base indicators (actual and potential forms of acidity, sum of absorbed bases, degree of saturation of bases, content of mobile aluminium), which are important components of soil fertility, are specific. Due to the fact that there is a close interaction between forest plantations and soil properties, changing the participation of species in the stand, it is possible to adjust the actual soil fertility. The soils under both pure and mixed spruce and larch stands are characterized by a high level of potential acidity that reaches the high acidic values in the upper horizons. A similar reaction of soil solution under coniferous forests is caused by acid hydrolysis of aluminosilicates and accumulation of mobile Al in the rhizosphere zone. Simultaneously, the same acidic characteristics, including the presence of movable aluminium, are also found in soils under broadleaved plantations. In general, acid-exchange properties of soils (high potential acidity, unsaturation of bases and availability of movable aluminium) traditionally are considered as unfavourable for vegetation. However, our researches refute it and prove that within certain values, these indicators do not limit the productivity of pure and mixed spruce and larch stands.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2020, 62, 4; 233-245
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of forest growth conditions on the wood density: the case of Amur Region
    Autorzy:
    Romanova, Natalia A.
    Zbirnov, Alexander B.
    Yust, Natalia A.
    Fucheng, Xu
    Powiązania:
    https://bibliotekanauki.pl/articles/2045741.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    forest growth conditions of the Amur region
    Amur region
    wood density
    Dahurian larch
    Scots pine
    wood moisture content
    Asian white birch
    Opis:
    The problem of determining the dependence of the chainsaw on the density of wood, substantiation of effective options for the number of chainsaws in the assortment and whiplash method of logging is quite relevant. In the Far East of Russia, in particular, in the Amur region, the forest growth conditions are different from the western ones, and therefore, the properties of the wood differ from the generally accepted ones. The article describes forest growth conditions that influence the properties of the wood in areas of the Amur region. Using the method of density determination, the density of larch, pine and birch were studied for first time in the areas of the region. The dependence of the density on humidity, age, species, season of the year and the area of growth was found out. The results of the research showed that under humidity of 70%, the density of larch was 1088.99 kg/m3, it was 919.8 kg/m3 for pine and it was for birch 915.9 kg/m3.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2018, 60, 4; 292-298
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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