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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Incidence of butt rot in Norway spruce seed stands in Poland's mountain regions assessed with sonic tomography

100%
Chomicz E.
Folia Forestalia Polonica. Series A . Forestry
|
2013
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tom 55
|
nr 4
The incidence and severity of butt rot were assessed in 12 selected Norway spruce seed stands in the Beskidy Mountains, Poland. A semi-invasive technique of sonic tomography was used for the assessment of rot damage. Stands of different age classes (100–120, 130–150, 160–170 years old) and distinct regions of provenance (Istebna and Orawa) were investigated. Hierarchical analysis of variance was used to determine effects of stand age and stand provenance on butt rot occurrence at a stand level. High incidence of butt rot was noted in all of the studied seed stands (47% to 87% of diagnosed tree samples). Stand age had a significant effect on percentage share of ‘damaged wood’ on the tomogram. The extent of rot damage was rising with stand age, and the largest was observed in the age category 160–170 years. Spruce stands of Istebna provenance were generally more damaged by butt rot than those of Orawa provenance, however, the latter have been growing in forest sites more suitable for spruce in terms of fertility and altitude. Hierarchical analysis of variance did not show a statistically significant relationship between the region of provenance and average share of ‘damaged wood’ on the tomogram. Presented results indicate that for stands growing in similar conditions vulnerability to butt rot is determined by stand age. Further research is needed to separate impact of stand provenance identified with specific genetic constitution of a population from the effect of environmental conditions typical of a given region of provenance.
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Early height growth of Scots pine (Pinus sylvestris L.) progenies from Polish clonal seed orchards

100%
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.
3
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Species conversion of spruce stands in the Wisła Forest District

84%
Skrzyszewski J., Skrzyszewska K.
Dendrobiology
|
2004
|
tom 51 Supplement
The paper provides some guidelines on the choice of the target species compositions for plantations that would replace monocultural spruce stands growing on the sites of the Silesian Beskid Mts. Part of the guidelines relates to the rules governing the sequence in which the monocultures will be converted into mixed stands. It is suggested that those rules should be combined with the principles of the establishment of progenyplantations. The seed stands of the Istebna spruce are experimentally divided into four categories according to their abilityto perform the function of a seed stand. The following features of the stands are analysed: vitality, density, stage of regeneration, protective and cultural functions. The paper contains also an outline of the methods of species conversion and the relevant references.
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Distribution of Lihtuanian Scots pine trees according to breeding categories and their seed production in seed stands

84%
Gabrilavicius R.
Dendrobiology
|
2002
|
tom 47 Supplement
In addition to other traits, value of stands for breeding can be evaluated according to the number of plus trees and productive trees. According to this property, stands with the highest value for breeding are located in eastern Lithuania. Trees start to differentiate into breeding categories at the juvenile stage: in Scots pine stands on Pinetum myrtillosum sites, at the age of 6to 8 years and in Scots pine stands on Pinetum vacciniosum sites, at age of 10 to 12 years. According to radial increment, the trees start to differentiate into selection categories of productive, medium and minus trees, which often remain in these categories until mature age. The following four types of radial increment of trees were distinguished: (1) fast growth at the juvenile stage, followed by a gradual decrease, (2) fast growth at the juvenile stage, followed by a stable growth from age 20 to 30 years, (3) slow growth at the juvenile stage, followed gradual increase, (4) unstable growth all the time. In Lithuania, abundant seed yield used to occur in three to four year intervals. Populations with abundant flowering may produce approximately 10 kg of seeds (filled and empty) per ha, while the populations with weak flowering - 1 to 2 kg per ha. In mature Scots pine stands of stocking level ca 0.7, 6to 8% of the seeds are produced by plus trees, 24% by productive trees, 55 to 60% by trees of medium productivity and 10% by minus trees. Being suppressed, minus trees produce 2% of the seeds only.
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Gene pool conservation programme of Norway spruce Picea abies (L.) Karst. in the Beskid Mts

67%
Jurasek M.
Dendrobiology
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2004
|
tom 51 Supplement
The paper describes the measures adopted by the Czech State Forests for the conservation and reproduction of the Norway spruce gene pool in the Moravian-Silesian Beskid Mts. In addition to the assurance of natural regeneration in genetically valuable stands and the use of high-quality autochthonous stands as seed sources for artificial regeneration, the measures include selection of plus-trees, establishment of seed orchards, seed stands and clone archives, and identification of gene pools. Seeds of the most valuable regional populations are deposited in a seed bank.
6
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Biometric characterisation of selected seed stands of Picea abies (L.) Karst. of Istebna

67%
Orzel S., Forgiel M.
Dendrobiology
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2004
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tom 51 Supplement
The paper assesses the growth of nine seed stands of Picea abies (L.) Karst. of Istebna. The stands were selected on the basis of the dynamic height growth and good adaptation of their progeny under different site conditions. The d.b.h. increment of trees during the entire lifespan of stands is analysed in detail, especially its magnitude and dynamics during the last twenty years, i.e. from 1982 to 2001.
7

Owady uszkadzajace szyszki i nasiona jodly pospolitej Abies alba Mill. w wybranych drzewostanach nasiennych na terenie Regionalnej Dyrekcji Lasow Panstwowych w Krakowie [poludniowa Polska]

51%
Skrzypczynska M., Mazurkiewicz I.
Acta Agraria et Silvestria. Series Silvestris
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2002
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tom 40
67-86
Results of the study on infestation of co nys of Abies alba Mill. by cono- and seminiphages insects (502 in total) are given. Forty three samples of cones (646 cones in total) collected in the selected seed stands in 35 localities (the Kraków Forest Region) in 1999-2000 were tested. During the study damaging insects were represented by conophages: Barbara herrichiana Obr., Dioryctria abietella (Fabr.) and Earomyia impossibile Morge, and seminiphages Resseliella piceae Seitn. and Megastigmus suspectus Borr. The most abundant species in both years was R. piceae (280 spec. in 1999; 79 spec. in 2000). Conophages inhabitat 37.6% of all analysed cones. Resseliella piceae destroyed the most seeds, i.e. 15.6% of 12,900 analysed, in both years. The indices of cone infestation (WZS) showed distinct differences in values for both years, namely 1.56 and 0,35 respectively.
8

Wplyw klimatu na wielkosc przyrostow radialnych lasotworczych gatunkow, wystepujacych na terenie Lesnictwa Bukowiec

43%
Feliksik E.
Acta Agraria et Silvestria. Series Silvestris
|
1993
|
tom 31
39-46
W pracy omówiono wyniki analiz dotyczących klimatycznych uwarunkowań wielkości przyrostów rocznych drewna: buka, jodły, świerka, modrzewia i sosny, rosnących w tych samych warunkach siedliskowych.
9

Owady zasiedlające szyszki jodły pospolitej Abies alba Mill. w wybranym drzewostanie Nadleśnictwa Ustrzyki Dolne (Karpaty) w roku 2012

43%
Skrzypczynska M., Sztuba T.
Acta Agraria et Silvestria. Series Silvestris
|
2014
|
tom 52
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