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1

Leśnictwo klonalne staje się faktem

100%
Chmura D. J.
Las Polski
|
2005
|
nr 15-16
2

O skuteczną poprawę wizerunku leśnictwa

100%
Chmura D. J.
Przegląd Leśniczy
|
2012
|
tom 22
|
nr 08
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Fenologia wiosennego rozwoju polskich proweniencji debu szypulkowego [Quercus robur L.] i bezszypulkowego [Q.petraea [Matt.].Liebl.]

100%
Chmura D. J.
Sylwan
|
2002
|
tom 146
|
nr 04
97-103
4
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Rezultaty badan 84-letniego doswiadczenia proweniencyjnego z sosna zwyczajna [Pinus sylvestris L.] w Pulawach

100%
Chmura D. J.
Sylwan
|
2000
|
tom 144
|
nr 01
19-25
5
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Analysis of results from a 59-years-old provenance experiment with Scots pine (Pinus sylvestris L.) in Lubień, Poland

100%
Chmura D. J.
Dendrobiology
|
2000
|
tom 45
In 1992 and 1997 there measurements were made on an experimental area which is a part of an international provenance experiment with Scots pine (Pinus sylvestris L.), established by IUFRO in 1938. This paper presents results obtained in these measurements. It is shown that best provenances are from Baltic countries and Central Europe. The most productive provenances had the most crooked stems. Scandinavian provenances had straight trees but low survival and productivity.
6

Jest miejsce dla genetycznego ulepszenia drzew

63%
Chmura D. J., Lewandowski A.
Las Polski
|
2013
|
nr 08
7
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Variation in growth and survival among European provenances of Pinus sylvestris in a 30-year-old experiment

51%
Barzdajn W., Kowalkowski W., Chmura D. J.
Dendrobiology
|
2016
|
tom 75
Provenance trials with forest trees provide valuable information about growth and adaptability of populations often transferred over large geographical and climatic distances. In this study we evaluated growth and survival of 19 Scots pine (Pinus sylvestris L.) populations representing most of the natural range of the species in Europe, growing in a 30-year-old provenance trial in the northeastern Poland. We used cluster analysis to investigate differentiation among those populations in growth and survival. We also used published data on needle morphology and allozyme and DNA marker variation for those same populations to compare groupings of populations based on growth and needle traits and markers. We found significant variation among tested populations in all investigated traits – the largest variation was found for stand volume which integrates information on growth and survival. Variation in growth traits was related to the latitude of population origin with populations from the latitudinal band between 49° N and 54° N showing the best performance. Populations originating from both north and south off of that region showed lower productivity, which for southern provenances resulted from their particularly low survival, reflecting the lack of adaptation to the environment of the research site. Grouping of populations based on growth traits revealed three clusters corresponding to the three latitudinal regions – northern, central and southern. Needle morphological traits were not appropriate as markers of productivity. Clustering of populations based on needle morphology, and especially based on biochemical and molecular markers, did not correspond to the grouping based on growth traits.
8
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Przystosowanie drzew, lasow i lesnictwa do zmian klimatycznych

51%
Chmura D. J., Howe G. T., Anderson P. D., St.Clair J.B.
Sylwan
|
2010
|
tom 154
|
nr 09
587-602
9
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Early height growth of Scots pine (Pinus sylvestris L.) progenies from Polish clonal seed orchards

51%
Chmura D. J., Giertych M., Rozkowski R.
Dendrobiology
|
2003
|
tom 49
Seed orchards are expected to produce geneticaly improved seeds while maintaining a sufficiently large genetic diversity. Field trials comparing open-pollinated Scots pine progeny from seed orchards and commercial seed stands were established at five climaticaly different sites in Poland. The paper presents first height measurements obtained on trees at age 4. Seedlots differed significantly, but there was no strong evidence of better performance of clonal seed orchards progeny over the progeny of production seed stands. There was no distinct geographical trend in the origin of the best growing seedlots, but populations from the northern part of country tend to perform better than south-eastern ones. Progeny of the local production seed stands at their native environment were not the best, except in one case. A strong site effect reflecting a fertility gradient of the planting sites was found.
10

Pąki lubią zimę

51%
Guzicka M., Chmura D. J.
Głos Lasu
|
2020
|
nr 01
11
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Zmienność proweniencyjna olszy czarnej w Polsce

45%
Rozkowski R., Mejnartowicz L., Guzicka M., Dorobek K., Chmura D. J.
Sylwan
|
2019
|
tom 163
|
nr 10
European black alder (Alnus glutinosa (L.) Gaertn.) is a widespread tree species associated with wetlands and riparian ecosystems, thus it plays an important ecological role. Due to its fast growth and favorable wood properties it also has a potential to satisfy a growing demand for wood and fiber. However, its growth potential is not fully realized in Poland. In this study we investigated variation in growth traits, productivity, and stem straightness among 11 populations of European black alder originating from the lowland distribution of the species in Poland. The common−garden experiment located in 1968 in Kórnik (mid−western Poland) has been so far the only provenance experiment with this species in our country. We measured height and diameter of all trees at the site, assessed stem straightness in a 5−step scale (1−crooked; 5−straight), and calculated productivity at age of 50 years, which should be considered close to the rotation age. We found significant variation among populations in all investigated traits. The difference in productivity between the best and the worst provenance reached 75%. Using published and unpublished data from previous measurements at this site we also analyzed a trend in provenance ranking through time. The best and worst provenance could be identified at age 16 years, but many ranking shifts took place afterwards at the intermediate rank positions. We conclude that growth, productivity and stem quality of black alder could be improved through selection of favorable provenances within the species. Selection decisions can be made at the age below the half the rotation age, although decisions at ¾ of rotation age would be more precise.
12
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Produktywność biomasy nadziemnej i podziemnej w doświadczeniu proweniencyjno-rodowym z dębem szypułkowym

39%
Chmura D. J., Guzicka M., Rozkowski R., Michalowicz D., Grodzicki W., Chalupka W.
Sylwan
|
2014
|
tom 158
|
nr 11
The biomass productivity of individual trees at age 14 years was investigated in the experiment with 8 provenances and 186 half−sib families of pedunculate oak (Quercus robur L.). The aim of the study was to develop allometric equations and estimate heritability of tree biomass. We sampled 28 model trees and measured dry mass of their components, including roots (on 14 trees). A decreasing share of aboveground biomass was allocated to stems, and an increasing share to branches and foliage with increasing tree size. Also a decreasing share of total tree biomass was found in roots with increasing tree dimensions. Allometric equations involving diameter at breast height in combination with tree height were developed to model biomass of all components and whole tree. We used those equations to estimate tree biomass on the sub− set of research area, involving all provenances and 180 half−sib families. Heritability coefficients for tree biomass were the greatest for provenances (0.84), average for families (0.58) and the lowest for individual trees (0.18). However, estimates of family heritability varied by provenance (from 0.18 to 0.74). These findings suggest that the most efficient strategy for improvement of productivity in pedunculate oak would be selection of provenances and families within provenances.
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