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Estimation of the effect of stand density on Scots pine stem form

100%

Socha J.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2007

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tom 06

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nr 4

It was attempted to study the effect of stand density on the stem form of Scots pine trees. To estimate stand density the index SDI of Reineke (1933) was used. The analyses carried out showed that the stand density index has no significant effect on values of breast height and specific form factors. The detailed analysis of the stem form curve permitted to conclude that stand density affects the form of the top part of the stem profile. Trees in stands of low density in comparison with trees in stands of high density are characterized by lower values of relative diameters in the top part of the stem, especially in the range from 0.7 to 0.9 of the tree height. However, differences in stem profiles of trees from stands of different density are significant only in the range from 0.82 to 0.89 of the relative height. Using the stand density index in the empirical equation for determination of volume does not increase its accuracy.

2

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Fluctuations in mean stem volume of common oak (Quercus robur L.) depending on age of trees

100%

Kazmierczak K., Pazdrowski W., Szymanski M., Nawrot M.

Colloquium Biometricum

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2009

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tom 39

3

Stem volume and aboveground woody biomass in noble fir [Abies procera Rehder] stands in the Rogow Arboretum [Poland]

80%

Jagodzinski A. M., Banaszczak P.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2010

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tom 09

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nr 2

9-24

The study was carried out in 39- and 43-year-old stands of noble fir (Abies procera Rehder) grown in the Rogów Arboretum of the Warsaw University of Life Sciences (Poland). The main objectives of our study were (1) to estimate stem volume over bark of noble fir grown out of its natural range, (2) to develop suitable allometric equations for estimating aboveground woody biomass components and (3) to estimate aboveground woody biomass components using site-specific allometric equations and to compare them with biomass estimated using allometric equations developed in stands grown within natural range of noble fir. The study showed that the mean DBH of trees was 20.14 cm in the younger stand and 22.25 cm in the older stand. The basal area of the 39-year-old stand was 49.01 m2·ha-1 and 43-year-old stand was 47.53 m2·ha-1. Based on the developed equation stem volume over bark was 374.87 m3·ha-1 and 356.24 m3·ha-1 in the 39- and 43-year-old stands, respectively. Based on the developed site-specific allometric equations total aboveground woody biomass in the 39-year-old stand was 189 Mg·ha-1 whereas in the 43-year-old stand it was 184 Mg·ha-1. Branch biomass in both stands equaled 19.9% of total aboveground wood biomass. Total aboveground woody biomass, estimated by allometric equations published by Ter-Mikaelian and Korzukhin [1997], equaled 233 Mg·ha-1 and 228 Mg·ha-1 in the 39- and 43-year-old stands, respectively. This means that the aboveground woody biomass is overestimated by ca. 23% in comparison with biomass estimated by our site-specific allometric equation. Generally, the existing equations published by Ter-Mikaelian and Korzukhin [1997] overestimated total aboveground woody biomass and stem biomass, while branch biomass was underestimated across all tree sizes compared to directly obtained biomass data.

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Wstepna dendrometryczna charakterystyka wybranych cech sosny zwyczajnej na proweniencyjnej powierzchni doswiadczalnej w Polanach k. Grybowa

70%

Orzel S., Sabor J.

Acta Agraria et Silvestria. Series Silvestris

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1994

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tom 32

37-44

W pracy stwierdzono istotny wpływ pochodzenia sosny na wysokość drzew oraz grubość odkładanej kory. Badania nie wykazały natomiast istotnego wpływu pochodzenia na wielkość pierśnicy i miąższość strzał bez kory w badanej populacji sosen.

Ograniczanie wyników

2 Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

1 Acta Agraria et Silvestria. Series Silvestris

1 Colloquium Biometricum

1 Banaszczak P.

1 Jagodzinski A. M.

1 Kazmierczak K.

1 Nawrot M.

1 Orzel S.

1 Pazdrowski W.

1 Sabor J.

1 Socha J.

1 Szymanski M.

1 2010

1 2009

1 2007

1 1994

Estimation of the effect of stand density on Scots pine stem form

Fluctuations in mean stem volume of common oak (Quercus robur L.) depending on age of trees

Stem volume and aboveground woody biomass in noble fir [Abies procera Rehder] stands in the Rogow Arboretum [Poland]

Wstepna dendrometryczna charakterystyka wybranych cech sosny zwyczajnej na proweniencyjnej powierzchni doswiadczalnej w Polanach k. Grybowa