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Wyszukujesz frazę "Kraft classes" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Monitoring of spruce stands in the Czerwona Woda river catchment of the Stołowe Mountains National Park
Autorzy:
Strzeliński, Paweł
Turski, Mieczysław
Powiązania:
https://bibliotekanauki.pl/articles/2044143.pdf
Data publikacji:
2019
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
tree biometrics
model trees
Kraft classes
Opis:
In the spring of 2017, Stołowe Mountains National Park started a research program related to the protection of water resources. The research program was started because of, among others, the growing problems of water resources and the dying of spruce trees. One of the projects commissioned by the Park was ‘Monitoring the impact of renaturisation and hydrological status on changes in the biomass of trees and stands’. The monitoring covered spruce stands growing along the main watercourse of the Park (the Czerwona Woda). As a part of the study, three rectangular surfaces (from 0.45 to 0.50 ha) and 10 circular areas (0.04 ha each) were established. On fenced rectangular surfaces, 10 model trees were selected using the Draudt method. They were monitored using hemispheric cameras (changes in crowns), dendrometers (changes in the circumference of stems) and minirhizotronami (changes in the root layer). In addition to the measurements of all the trees on the surface, imaging with terrestrial laser scanning and hemispherical images was done. The data and results presented in this work were created as a result of the implementation of a project financed from funds related to the forestry fund of the State Forests National Forest Holding.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2019, 61, 1; 90-95
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wydajność aparatu asymilacyjnego sosny zwyczajnej (Pinus sylvestris L.) różnych klas wieku
Productivity of the assimilation apparatus of Scots pine (Pinus sylvestris L.) in various age classes
Autorzy:
Turski, M.
Beker, C.
Jaszczak, R.
Powiązania:
https://bibliotekanauki.pl/articles/989700.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany sosnowe
klasy wieku
klasy Krafta
drzewa lesne
sosna zwyczajna
Pinus sylvestris
aparat asymilacyjny
wydajnosc aparatu asymilacyjnego
volume of leaved twigs
productivity of assimilating apparatus
age classes
kraft's classes
Opis:
Productivity of the assimilating apparatus is commonly defined as an increment in volume, most typically of the stem or trunk, per unit of crown size. In this paper the productivity of the assimilating organ (CPtwn1) is calculated as a quotient of the average annual increment in stem volume from a 5−year period (iv1) and the volume of twigs with needles (twnv), determined by xylometry methods (fluid displacement method). The experimental material comprised measurements taken on 200 Scots pines (Pinus sylvestris L.) in 8 pure pine stands growing in western Poland (tab. 1). Using the calculated sizes of assimilating apparatus, their arithmetic means and coefficients of variation were calculated for each stand (tab. 2, 3). Additionally, mean crown productivity within each Kraft's class comprising the dominant trees (classes 1, 2 and 3) as well as in the dominated trees (classes 4 and 5) were determined. The strength of the relationship between CPtwn1 and diameter at breast height (d1.3), height (h) and volume of leaved twigs (twnv) was calculated (tab. 4). Moreover, a two−way analysis of variance was conducted to assess the statistical significance of the effect of age of the stand and biosocial class of tree position in the stand (within the dominant trees and the dominated trees) on productivity of the assimilating apparatus. Mean productivity of analysed Scots pine crowns takes the highest values in the youngest stand (0.60 m³), while the lowest – in the oldest stand (0.34 m³). In the youngest, 25−year old pine stand, mean productivity of the assimilating apparatus in trees forming the dominated trees is by 124% greater than that of trees forming the dominant trees. An opposite situation is found in the oldest, 93−year−old stand, where mean productivity of the dominant trees is over 1.5 greater than that recorded in the dominated trees. Statistically significant effect of the stand age on productivity of the assimilating apparatus was observed (tab. 5). However, affiliation of a tree to the dominant or dominated trees does not result in such an effect. On the other hand, there is an interaction between age of the stand and its affiliation to the Kraft's classes. This means that the affiliation of trees to the dominant trees or the dominated trees and its effect on mean productivity of the assimilating apparatus depend on the age of stand.
Źródło:
Sylwan; 2015, 159, 01; 36-44
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane charakterystyki koron drzew i ich związek z pierśnicą oraz wysokością w drzewostanach sosnowych różnych klas wieku
Selected features of tree crowns and their relationship with the dbh and height in pine tree-stands of different age classes
Autorzy:
Turski, M.
Jaszczak, R.
Deus, R.
Powiązania:
https://bibliotekanauki.pl/articles/1008333.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
dendrometria
drzewostany sosnowe
drzewa lesne
sosna zwyczajna
Pinus sylvestris
klasy wieku
klasy Krafta
korony drzew
piersnice drzew
korelacja cech
wysokosc drzew
powierzchnia rzutu korony
srednica korony
dlugosc korony
pine
crown
variation
kraft’s classes
dominant stand
Opis:
The paper discusses the selected crown characteristics of pine trees, their variability and dependence on breast height diameter and height. The analysis relates to the dominant forest stands of different age classes, and the Kraft classes forming them.
Źródło:
Sylwan; 2012, 156, 05; 369-378
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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