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Zmiany struktury sortymentowej drzewostanów sosnowych I bonitacji w Nadleśnictwie Pisz

100%

Lewandowska M., Stepien E.

Sylwan

2013

tom 157

nr 06

In spite of the growing importance of the protective and social functions of forests, their productive function, including production of raw wood with a diversified assortment structure, is still prominent. Changes in the assortment structure depend to a large extent on tree species, habitat conditions and intensity of tending treatments. However, for the temporal organization of forest management, it is essential to recognize the dynamics of these changes in relation to stand age. The paper contains an analysis of quantitative and qualitative changes in the assortment structure of the Ist site index pine stands in the Wilcze Bagno Forest Compartment (Pisz Forest District), depending on the length of the primary production of standing timber. Data from 10 forest stands similar in terms of habitat, stand density and management treatments were taken for analysis. These stands form a homologous series ranging in age between 40 and 130 years.

Określenie wieku dojrzałości rębnej drzewostanów sosnowych I bonitacji na przykładzie Obrębu Wilcze Bagno (Nadleśnictwo Pisz)

84%

Stepien E., Lewandowska-Gross M.

Sylwan

2013

tom 157

nr 07

The paper presents determination of the rotation age in Scots pine stands of 1st site index class on the example of Pisz Forest District (northern Poland). The development of quantitative and qualitative changes in the structure of 10 stands, forming a homologous series ranged between 40 and 130 years was the basis for determining their rotation age. Stand maturity for cutting was determined taking into account three variants of production targets considered alternatively. Traditional criteria and financial indicators were adopted to determine the rotation age. The traditional criteria included the absolute yield of a given variant, the average yield of an assortment per hectare and per year and the percentage share of each assortment group in relation to the growing stock of stands. The financial criteria included the assortment value of the considered variants of production targets, the average change in the value of these assortments, the percentage share of each assortment group in relation to the total growing stock and the average price of one cubic meter of the selected assortments groups.

Ograniczanie wyników

2 Sylwan

2 Stepien E.

1 Lewandowska M.

1 Lewandowska-Gross M.

2 2013

Wyniki wyszukiwania

Zmiany struktury sortymentowej drzewostanów sosnowych I bonitacji w Nadleśnictwie Pisz

Określenie wieku dojrzałości rębnej drzewostanów sosnowych I bonitacji na przykładzie Obrębu Wilcze Bagno (Nadleśnictwo Pisz)