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Wyszukujesz frazę "mixed plantation" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Wzrost sosny zwyczajnej i olszy szarej w mieszanej uprawie na pożarzysku w Nadleśnictwie Potrzebowice
    The growth of Scots pine and grey alder in the mixed plantation on the fire−burnt area in the Potrzebowice Forest District
    Autorzy:
    Barzdajn, W.
    Ceitel, J.
    Zientarski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1026424.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    olsza szara
    wzrost roslin
    odnowienia lasu
    hodowla lasu
    tereny popozarowe
    Alnus incana
    sosna zwyczajna
    lesnictwo
    Nadlesnictwo Potrzebowice
    Pinus sylvestris
    drzewa lesne
    uprawy lesne
    alnus incana
    pinus sylvestris
    mixed plantation
    Opis:
    Grey alder (Alnus incana Moench.) in Poland is a recommended species for dry and oligotrophic habitat improvement and land reclamation. In Poland these issues have not been thoroughly investigated. The field experiment with Scots pine and grey alder in the mixed plantation was carried out on the fire−burnt area in the Potrzebowice Forest District. The proportion of grey alder in the species composition of plantations notably improved the growth of pine, but only with a 50−75% share of alder. This created some disturbances in the tending of plantations. The impact of pine on alder was negative.
    Źródło:
    Sylwan; 2003, 147, 06; 47-51
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ suszy na ściółkowo-glebowe zgrupowania skoczogonków (Collembola, Hexapoda) w lesie mieszanym
    Influence of drought on epigeic soil collembolan communities (Hexapoda) of moderately humid mixed deciduous forest
    Autorzy:
    Sławska, M.
    Sławski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/987116.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy mieszane
    sciolka lesna
    gleby lesne
    owady
    skoczogonki
    Collembola
    zgrupowania zwierzat
    bogactwo gatunkowe
    liczebnosc
    czynniki klimatyczne
    susza
    wysokie temperatury
    niedobor opadow
    soil fauna
    mature forest
    young plantation
    precipitation paucity
    indicator species
    Opis:
    The resilience of forest ecosystems to climate changes such as elevated temperature and frequent drought episodes, strongly depends on how the soil subsystems and its inhabitants responds to these perturbation. The epigeic soil Collembola communities of mature mixed deciduous forest and adjacent young plantation on moderately humid soil were compared in two consecutive years, out of which the second one was marked by significant deficiency of precipitation in growing− −season. The study plots were established on the area of experimental forests of Warsaw University of Life Science−SGGW in Rogów (central Poland). The objectives of the study was to assess the sensitivity of forest Collembola communities to drought stress and to check if the reaction depends on stand age. We also aimed to test if an indicator species of climate changes can be appointed. The results showed that three months drought episode had negative impact on forest Collembola communities of mature stands, while communities of young plantation were not affected. The reduction of total abundance of Collembola and clear changes in communities structure in mature stand was detected in the year of lower precipitation. The Collembola communities of young plantation were also significantly transformed, but in result of clear cutting and soil preparation. Therefore, the successional changes were the most evident process in these communities and there were no signs of drought influence. Among the most numerous species in Collembola communities of mature forest Isotomiella minor was appointed as an indicator of drought, because its abundance was drastically reduced in the year of lower precipitation. The small number of specimen of this species in young plantation may also prove its sensitivity to deficiency of humidity in soil. The significantly negative response to drought episode was documented also for Psuedosinella horaki, Micraphorura absoloni and Megalothorax minimus. Our study provided strong evidence that the drought, which lasted only three months, had a detrimental effect on forest Collembola commu− nities.
    Źródło:
    Sylwan; 2017, 161, 01; 71-80
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prognostic Crown Diameter equations for a Mixed Species Plantation in Southern Nigeria
    Autorzy:
    Buochuama, A.
    Oyebade, B. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1113007.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    crown
    crown diameter
    mixed species plantation
    model
    Opis:
    The dimension of a tree crown has an apparent effect on and is strongly linked with the growth of the tree and its diverse parts. Crown information is an important part of numerous growth and yield models. Hence, empirical predictive equations for crown diameter of a mixed species plantation in Southern Nigeria were developed and evaluated in this study. In studying this phenomenon, total enumeration of the selected species in the mixed species plantation was carried out. Moreover, major growth attributes of 185 trees of six species, namely; Khaya ivorensis, Entandrophragma angolense, Terminalia ivorensis, Tectona grandis, Treculia africana and Mansonia altissima were measured and estimated using mensurational methods. Descriptive, correlation, regression and residual analyses were then applied to the quantitative data obtained from the mixed species plantation. For all the species, the best adjudged model with the best fit indices was Ln(cd) = Ln(b0) + b1·CPA·dbh, R2 = 0.936, SEE = 0.037; an indication of parsimonious potential of a predictive exponential model. This paper, therefore, revealed the possibilities of predicting crown diameter for a mixed species plantation in Nigeria with ample prospects for sustainable planning and management decisions that are relevant for any mixed species plantation.
    Źródło:
    World News of Natural Sciences; 2018, 16; 117-129
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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