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Wyszukujesz frazę "mixed plantation" wg kryterium: Wszystkie pola


Wyświetlanie 1-3 z 3
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
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
    Wyświetlanie 1-3 z 3

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