Temat: site index model - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Wyprowadzanie ogólnych dynamicznych równań bonitacyjnych za pomocą uniwersalnej metody rożnic algebraicznych
Derivation of Generic Dynamic Site Equations Using Generalized Algebraic Difference Approach
Autorzy:: Cieszewski, C.J.
Zasada, M.
Powiązania:: https://bibliotekanauki.pl/articles/1026347.pdf
Data publikacji:: 2003
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: metoda roznic algebraicznych
bonitacja siedliska
lesnictwo
site index model
site productivity
base−age invariance
dynamic equations
Opis:: This article describes use of the Generalized Algebraic Difference Approach for derivation of generic dynamic site equations. The generic equations are useful in situations of unspecific expectations with regards to the final model form where one wants to test simultaneously in a single fitting many various models and assumptions about the modeled processes. Equations derived in this work are extremely flexible with various patterns of polymorphisms and asymptotes. Even thought in principle the generic equations have more parameters, those derived with methodology proposed here are very parsimonious.
Źródło:: Sylwan; 2003, 147, 03; 40-46
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Krzywe bonitacyjne świerka pospolitego na siedliskach górskich
Site index curves for Norway spruce on mountain habitats
Autorzy:: Socha, J.
Powiązania:: https://bibliotekanauki.pl/articles/973956.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: dendrometria
bonitacja siedliska
modele bonitacyjne
Picea abies
leśnictwo
drzewa leśne
świerk pospolity
góry
siedliska leśne
site index model
base−age invariant dynamic equation
height growth
picea abies (l.) karst.
Opis:: The aim of the study was to develop a site index model for mountain spruce stands. The research material contained the height growth data obtained from stem analysis of 95 trees. The collected material was used to calculate the parameters of four dynamic growth equations, which allowed to determine site productivity and predict height growth based on age and height of stands. The equation that best describes the height growth of the examined spruces was selected from among different solutions using statistical criteria for assessing the accuracy of fitting empirical data and biological realism. The developed model can be used to predict the height growth and determine the site index for mountain spruce stands.
Źródło:: Sylwan; 2011, 155, 12; 816-826
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Ocena możliwości zastosowania tablic Bergela dla daglezji zielonej (Pseudotsuga menziesii (Mirb.) Franco) w Polsce
Potential use of the Bergel yield tables for Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) in Poland
Autorzy:: Zasada, M.
Panka, S.
Sagan, J.
Powiązania:: https://bibliotekanauki.pl/articles/989722.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
zasobnosc drzewostanu
drzewostany daglezjowe
daglezja zielona
Pseudotsuga menziesii
modele wzrostu
bonitacja siedliska
tablice zasobnosci drzewostanu
tablice Bergela
yield tables
growth model
site index
forest productivity
non−native tree species
Opis:: There are no original local yield tables for Douglas fir stands grown in Poland. In the presented study we attempted to answer the question whether it is possible to successfully use the German yield tables for Douglas fir developed by Bergel [1985]. Based on the data from these yield tables we developed the height growth model (site index curves) for Douglas fir in the form of the polymorphic equation with variable asymptotes. This model appeared to be, as expected, far better than the anamorphic model. We applied the elaborated equation for calculation of the site index for 63 randomly selected research plots located on the typical Douglas fir habitat types (fresh mixed broadleaved forest and fresh broadleaved forest) in western Poland. We concluded that the mean site index values are significantly higher in younger stands than in the older ones. To determine the reason for this phenomenon, we tested the resulting model using the published data from the permanent research plots. We found out that the pattern of site index changes with age varies for stands in different age classes. Moreover, we noticed, that regardless the age of the stand, in the recent decades there is the increasing height growth rate, which can be attributed to the change in environmental conditions. On the other hand, the analysis of the other characteristics of the sample plots revealed, that there is no significant relationship between site index values and site and plot location, as well as between the productivity level, expressed by the value of the EN coefficient, and age class, site and location of the stand. Bergel yield tables can be used in Polish conditions taking into account the age−dependency of the site index values.
Źródło:: Sylwan; 2015, 159, 08; 619-631
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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