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    Wyświetlanie 1-3 z 3
    Tytuł:
    Trends in forest fuel accumulation in pine forests of Kyiv Polissya in Ukraine
    Autorzy:
    Harzhii, Roman V.
    Yavorovskyi, Petro P.
    Sydorenko, Serhii Н.
    Levchenko, Valery B.
    Tyshchenko, Olexandr M.
    Tertyshnyi, Anatolii P.
    Yakubenko, Borys Ye.
    Powiązania:
    https://bibliotekanauki.pl/articles/2041249.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    Pinus sylvestris L.
    pine stands
    forest fires
    litter
    forest fuel
    Opis:
    At present, forest fire research is becoming especially relevant in Ukraine. This study examines patterns of forest fuel accumulation in pine (Pinus sylvestris L.) stands that grow in different soil conditions with different pine stand structure. To estimate the load of forest fuel of different fractions, a combined methodology was used: the weighing method and the FIREMON (fuel load estimation) method. It was found that increase in surface forest fuel loads is not directly proportional to forest stands’ age. Fractional size distribution, capacity and loads of forest fuel depend on several factors, among which the greatest role is played by forestry characteristics of the pine stand. It was determined that in the forest site conditions of type C (fairly rich soils) in Kyiv Polissya, the share of forest litter compared to pine stands that grow in poor soil conditions (A) is smaller, ranging from 41% to 76% of the total forest fuel load. The mass proportion of the duff layer varies from 15% in young forest stands to 43% in mature stands. It was established that changes in forest fuel fractions for 1, 10, 100 and 1000 hours varied insignificantly with age rate. The share of substratum woody debris of 10 and 100 hours was insignificant and depended more on the forestry treatment regime on these sites. The mass proportion of coarse woody debris (1000 hours) was also insignificant, varying from 0% to 5.9% of the total load of surface fuel.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2021, 63, 2; 116-124
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic forest fire risk evaluation in Poland
    Autorzy:
    Szczygieł, Ryszard
    Kwiatkowski, Mirosław
    Kołakowski, Bartłomiej
    Piwnicki, Józef
    Powiązania:
    https://bibliotekanauki.pl/articles/2041632.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    forest fire risk degree
    dynamic forest risk
    pine litter moisture content
    method of forecasting forest fire risk
    Opis:
    The weather conditions determine the dynamic forest fire risk. In Poland, the dynamic forest fire risk is calculated using a method elaborated at the Forest Research Institute. The forest fire risk degree (4-level scale) is calculated every day at 9:00 am and at 1:00 pm during the fire season (1.03 till 30.09) for 60 prognostic zones selected on the basis of stand and climatic conditions. 97% of all annual forest fires occur during the fire season. Surface fires are a significant part of the fires (90%) and occur in forest stands where pine is the dominant species. The purpose of the research was to prepare a new method of forecasting forest fire risk, which would enable a more precise method of evaluation of the risk of an outbreak of fire in relation to the existing and forecast meteorological conditions in forests. The results obtained during testing of this method indicate a high accuracy in forecasting fire risk and a satisfactory precision of formulae for calculating moisture content of pine litter. The assumptions of the new method included: – possibility of determining the actual risk of fire for the given area, being the average for all measurement points located on the terrain equally those in which the moisture content measurement of litter has not been performed, – possibility of forecasting the risk of forest fire for the afternoon in the morning hours of the given day, – possibility of forecasting fire risk for the following day, – forecasting moisture content of litter for the afternoon and of the given day and for the following day, – drawing up a method enabling limitation of operational costs of fire prevention system.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2020, 62, 2; 139-144
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Species diversity and litter dynamics in secondary mixed deciduous forest, Thung Salaeng Lung National Park, Northern, Thailand
    Autorzy:
    Podong, C.
    Poolsiri, R.
    Katzensteiner, K.
    Pengthamkeerati, P.
    Thongdeenok, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/38576.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    species diversity
    species composition
    carbon
    nitrogen
    litter dynamics
    secondary mixed deciduous forest
    shifting cultivation
    Thung Salaeng Lung National Park
    Thailand
    Opis:
    This study present species composition and potential of litter on carbon and nitrogen return in secondary mixed deciduous forest after shifting cultivation. The dominant species of trees were Haldina cordifolia, Albizia odoratissima and Lagerstroemia duperreana. The Important Value Index (IVI) values of trees were 132.91, 17.78 and 14.22, respectively. The pattern for the decomposition coefficients (k) was highest in the wet period (May–September) and lowest in the dry period (October–April). The carbon and nitrogen return patterns increased in the dry period (October– April) and decreased in the wet period (May–September). Carbon and nitrogen loss in the decomposing litter continually decreased during the decomposition process from the initial levels, with a final relatively rapid release in the wet period. Results from this study was understanding of community composition, litterfall production and litter decomposition for understanding potential of secondary mixed deciduous forest for balancing carbon for mitigating greenhouse gas effect in the local area.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2013, 55, 4
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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