Modele struktury grubości w dwu- i wielopiętrowych drzewostanach z udziałem jodły Abies alba Mill. i buka Fagus sylvatica L.

• Autorzy: Pach M. , Podlaski R.

Warianty tytułu

EN

Models of diameter structure in two- and multi-storied stands with fir Abies alba Mill. and beech Fagus sylvatica L.

• Języki publikacji: PL

Abstrakty

EN

The objectives of the study were (1) to determine the models of diameter at breast height (dbh) distributions in two− and multi−storied mixed stands with fir Abies alba Mill. and beech Fagus sylvatica L. as well as (2) to assess the usefulness of single Weibull distribution and two−component mixture of Weibull distribution to approximation of empirical dbh distributions for distinguished models of dbh structures. In the Świętokrzyskie Mountains, 21 sample plots ranging in size from 0.2 to 0.4 ha were established. To identify the models of dbh distributions, in two− and multi−storied stands with similar empirical dbh distributions, the hierarchical cluster analysis (HCA) with the Jaccard's measure and the Ward's minimum variance agglomeration method were used. To approximate dbh distributions, the single Weibull distribution and the two−component mixture of Weibull distribution were employed. In two− and multi−storied mixed stands with fir and beech, with the mean age between 50 and 70 at the dbh, four models of dbh distributions were determined (fig. 1). Two of them were decreasing, strongly asymmetric (OS and OJ models; fig. 2) and the other two were increasing in the initial phase and decreasing in the final, having two maximums (DM1 and DM2 models; fig. 3). In the stands with the complex structure mixed distribution should be used to approximate empirical data. The analysis revealed high suitability and versatility of Weibull distribution both as single form and two−component mixture.

Słowa kluczowe

PL

lesnictwo; drzewostany mieszane; struktura grubosci; drzewostany dwupietrowe; drzewostany wielopietrowe; jodla pospolita; Abies Alba; buk zwyczajny; Fagus sylvatica; rozklad piersnic; rozklad Weibulla; rozklad mieszany

• Wydawca: -
• Czasopismo: Sylwan
• Rocznik: 2015
• Tom: 159
• Numer: 08
• Opis fizyczny: s.632-638,rys.,bibliogr.

Twórcy

autor

Pach M.

• Zakład Szczegółowej Hodowli Lasu, Uniwersytet Rolniczy w Krakowie, al.29 Listopada 46, 31-425 Kraków

autor

Podlaski R.

• Zakład Ochrony Przyrody i Fizjologii Roślin, Uniwersytet Jana Kochanowskiego, ul.Świętokrzyska 15, 25-406 Kielce

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