Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "jakość hodowlana" wg kryterium: Wszystkie pola


Wyświetlanie 1-11 z 11
Tytuł:
Zmienność, jakość hodowlana i właściwości fizyczno-mechaniczne drewna trzech pochodzeń buka
Autorzy:
Tarasiuk, S.
Jednoralski, G.
Powiązania:
https://bibliotekanauki.pl/articles/1022150.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
wlasciwosci mechaniczne
drewno bukowe
jakosc technologiczna
buk zwyczajny
zmiennosc proweniencyjna
proweniencje
hodowla lasu
wlasciwosci fizyczne
jakosc hodowlana
lesnictwo
Fagus sylvatica
drzewa lesne
european beech
silvicultural quality
technical quality of wood
provenances
seed zones
populational
tree improvement
intraspecific variability
Opis:
This paper reports 45 years of study on a provenance trail of European beech planted in the Rogów Experimental Forest in central Poland (190 m a.s.l.). Survival, growth and crown shape are analyzed in unthinned till the age of 40 years 3 provenances. The response to the thinning, and selected physico−mechanical properties of wood are analyzed. It is concluded that the poor quality and scarcely distributed local populations of beech is in many respects over−competed by the coastal beech provenance.
Źródło:
Sylwan; 2005, 149, 03; 42-49
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ zagęszczenia na wzrost i jakość hodowlaną sosny w odnowieniach naturalnych
Effect of density on growth and silvicultural value of Scots pine in natural regeneration
Autorzy:
Tarasiuk, S.
Kopeć, K.
Drozdowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/973324.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
hodowla lasu
odnowienia naturalne
naloty
sosna zwyczajna
Pinus sylvestris
leśnictwo
młodniki
wzrost roślin
zagęszczenie drzew
przyrost wysokości
jakość hodowlana
scots pine
natural regeneration
stand tending
tree height
silvicultural quality
biotic and abiotic damage
Opis:
The paper was aimed at determination of the effect of different tree density in the naturally regenerated monotypic and even aged young Scots pine stands growing in the fresh coniferous or mixed fresh coniferous forest sites on their further development. Research was carried out in Nowa Dęba Forest District (south−eastern Poland). A total of 12 research plots (160×40 m) were established in the selected stands. Plots were divided into 4 equal square pieces (40×40 m), where different methods of tending were applied (variant A – control, variant B – thinned, leaving 16 thousand trees/ha, variant C – thinned, leaving 10 thousand trees/ha, variant D – thinned, leaving 6 thousand trees/ha). The thinning was carried out in April 2007. In subsequent years (2007−2010), selected elements of stand structure like: height, height increment, density and damage resulting from abiotic and biotic factors were determined. Tree density significantly influenced both height increment and qualitative (tree shape) characteristics of naturally regenerated young pine trees. In the course of early thinnings, the number of trees needs to be reduced approximately down to the 10−16 th. stems/ha in the first stage of growth (seedlings), and further down to about 6 th./ha in the coppice stage. Such density enhances the chance of good growth and silvicultural quality of the stand. Noteworthy, even the heavy thinning does not significantly impact the actual proportion of both biotic (e.g. ungulate browsing) and abiotic (e.g. heavy snow) damage in the young naturally regenerated Scots pine forest stands.
Źródło:
Sylwan; 2015, 159, 12; 989-996
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jakość hodowlana buka zwyczajnego (Fagus sylvatica L.) po 20 latach wzrostu na powierzchni proweniencyjnej w Nadleśnictwie Brzeziny
Silvicultural quality of common beeches (Fagus sylvatica L.) after 20 years of growth on a provenance plot in Brzeziny Forest District
Autorzy:
Szeligowski, H.
Buraczyk, W.
Drozdowski, S.
Andrzejczyk, T.
Stępniarek, M.
Dzwonkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/980226.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
drzewa lesne
buk zwyczajny
Fagus sylvatica
jakosc hodowlana
wzrost roslin
pokroj
doswiadczenia proweniencyjne
Nadlesnictwo Brzeziny
provenance plots
growth traits of trees
tree habit
silvicultural quality
Opis:
Paper presents an analysis of phenotypical variation and an evaluation of silvicultural quality of progeny from 27 beech stands around Poland that grow on the provenance plot in the Brzeziny Forest District (51.791997°N, 19.813841°E). The trial commenced in spring 1996, on the basis of 2−year−old saplings with covered root systems. A randomised block method with 3 replications was applied, with subsequent measurements and analyses carried out in 2015, following 20 years of growth. The considered features included height, breast−height diameter, crown habit, trunk curvature and height of branching. Single−factor analysis of variance and Tukey’s HSD test were applied to determine the significance of differences among provenances. The largest mean height was attained by beeches originating from Gdańsk, Szczecinek and Bierzwnik. The least−tall beeches were in turn those whose origins were in Tomaszów, Łagów and Grodzisk. The greatest intra−population variation in height characterised the beeches from Gryfino and Krucz, while the most limited variation was noted for Gdańsk population. The beeches of greatest girth were again those deriving from Gdańsk, Bierzwnik and Szczecinek populations, as well as the one from Kwidzyn 15. The lowest values for diameter at breast height were again noted for the Grodzisk, Tomaszów and Łagów provenances. Marked intra−population variation in this feature characterised trees from the Gryfino, Bieszczady National Park (42), Zdrojów and Krucz provenances. The populations also differered in relation to analysed more−qualitative features. The group of populations prized most in terms of their overall silvicultural quality included Gryfino, Grodzisk, Zdrojów, Bieszczady National Park, Bierzwnik and Szczecinek provenances. In contrast, only low quality was manifested by beeches from Tomaszów, Rymanów, Wejherowo, Młynary, Golub− −Dobrzyń and Kwidzyn provenances. In general, populations originating from the north (especially Pomerania) achieved better growth and a more favourable quality evaluation than those from the south, and sites located near the range limits of the species (fig. 7). The obtained results show that northern Poland boasts the most plastic populations of beech. Equally, it was not possible to establish that populations of local origin were superior in terms of growth to those originating in more far−flung parts of Poland. Furthermore, assessments of different populations in terms of their growth and quality features often proved highly disparate.
Źródło:
Sylwan; 2019, 163, 07; 590-600
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie dolnych warstw drzewostanu w planowaniu hodowlanym
Under-canopy layers in silvicultural planning
Autorzy:
Żybura, H.
Pewniak, B.
Powiązania:
https://bibliotekanauki.pl/articles/989497.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
planowanie hodowlane
drzewostany sosnowe
drzewostany wielopietrowe
podszyt
dab
Quercus
odnowienia podokapowe
jakosc hodowlana
scots pine
oak
silvicultural value
multi−layer stands
Opis:
Currently observed climate change creates favourable conditions for the development of not only deciduous species (oak and beech), but also some coniferous (e.g. fir). In the Scots pine stands growing on fertile forest site types one can observe the dynamic development of the under−canopy layers composed of those species. Oak or beech saplings are often characterized by good silvicultural value. Also silver fir creates a well−developed cover under Scots pine trees. Beech and fir as the most shade−tolerant tree species are able to handle the conditions under Scots pine. They can grow for a long time under the cover without damage to their height or diameter growth. Especially, a dynamic growth of oaks can often be observed on fresh mixed coniferous and fresh mixed broadleaved habitats. Oak layers in Scots pine stands are generally created in the way of natural regeneration with remarkable contribution of the jays, which spread the seeds even at considerable distances from the old trees. The corresponding intensity of thinnings supports to shape the proper silvicultural value of such under−canopy storeys. Observations on growth of such stand layers in the Scots pine stands in eastern and central Poland consider the desirability of including them in the next generation of stands. Their presence contributes to improvement of the biological stability of the stands, and also leads to increased productivity. By implementing to the forest practice the model of semi−natural silviculture, one wants to consider the possibility of using the saplings currently existing under the Scots pine as a component of the future stand. Knowledge about the silvicultural value and the impact on growth of lower layers will enable to develop the principles of proper cultivation of the multi−storey stands.
Źródło:
Sylwan; 2016, 160, 10; 815-821
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena jakości hodowlanej dwuletnich sadzonek sosny zwyczajnej (Pinus sylvestris L.) poddanych sterowanej mikoryzacji
Assessment of silvicultural quality of two−year−old Scots pine (Pinus sylvestris L.) seedlings under controlled micorrhization
Autorzy:
Aleksandrowicz-Trzcińska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1026529.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
sadzonki dwuletnie
opor elektryczny
tkanki przykambialne
sadzonki mikoryzowane
jakosc hodowlana
sosna zwyczajna
lesnictwo
stopien zmikoryzowania
Pinus sylvestris
drzewa lesne
pine seedlings
silvicultural quality
biometric parameters
micorrhizal colonisation
electrical impedance
Opis:
Three methods were used to assess silvicultural quality of two−year−old Scots pine (Pinus sylvestris L.). The assessment was based on measurements of biometric parameters, colonisation level of micorrhizas and electrical impedance of cambial tissues of shoots. The applicability of these methods with special reference to micorrhizal colonisation and impedance methods, which so far were not used in the assessment of the planting material, was analysed.
Źródło:
Sylwan; 2003, 147, 02; 49-57
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena naturalnego i sztucznego odnowienia drzewostanów sosnowych Pinus sylvestris L. w Nadleśnictwie Nowa Dęba
Evaluation of the natural and artificial regeneration of Scots pine Pinus sylvestris L. stands in the Forest District Nowa Deba
Autorzy:
Długosiewicz, J.
Zając, S.
Wysocka-Fijorek, E.
Powiązania:
https://bibliotekanauki.pl/articles/1291496.pdf
Data publikacji:
2019
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
hodowla lasu
odnowienia lasu
drzewostany sosnowe
odnowienia naturalne
odnowienia sztuczne
sosna zwyczajna
Pinus sylvestris
jakosc hodowlana
wzrost roslin
zywotnosc drzew
zdrowotnosc drzew
zageszczenie drzew
stopien pokrycia terenu
Opis:
The main purpose of this article was to highlight the potential for enhancing positive silvicultural effects and their dependency on the management method in Scots pine Pinus sylvestris L. stands. We therefore assessed the impact of natural and artificial regeneration on vitality and health, compaction, surface coverage and seedlings height. Another important goal was to assess the severity of damage in the selected forest sites. A comparative analysis was carried out based on results from field work conducted in the autumn 2010 in the Forest District Nowa Dęba. As part of this field work, also the breeding quality of the analyzed pine renewals was assessed. The obtained results indicate that natural regeneration of Scots pine under the conditions of a fresh coniferous forest as well as a fresh mixed coniferous forest is the most reasonable management practice. In wet mixed coniferous forests however, the naturally regenerating Scots pine seedlings are of lower silvicultural quality and growth parameter values compared to those in artificially regenerated stands. In fresh mixed broadleaved forests, naturally regenerated Scot pine trees showed slightly lower silvicultural quality and vitality than artificially regenerated trees. Our results indicate furthermore that there are indeed conditions under which the restoration of Scots pine in the Nowa Dęba Forest District using natural regeneration is preferable. We also found that the employed method of renewing has a significant impact on pine growth parameters in the moist mixed coniferous forest habitat. Naturally renewing pines are characterized by a lower overall viability, but at the same time natural regeneration provides a larger number of individuals with the best viability (1st vitality class), which can be a valuable selection basis for trees used in breeding.
Źródło:
Leśne Prace Badawcze; 2019, 80, 2
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Długotrwałe efekty różnego nasilenia trzebieży selekcyjnej w drzewostanie sosnowym
Long-term effects of different thinning intensity in young Scots pine stands
Autorzy:
Zachara, T.
Powiązania:
https://bibliotekanauki.pl/articles/986702.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
drzewostany sosnowe
zabiegi pielegnacyjne
trzebiez selekcyjna
sosna zwyczajna
Pinus sylvestris
wzrost roslin
jakosc hodowlana
scots pine
silviculture
tending cuts
basal area increment
stand resistance
Opis:
The paper describes a case study of thinning experiment established in 1976 with a use of random block design in 21−year−old Scots pine stand in Janów Lubelski Forest District (south−eastern Poland). The stand was subjected to no thinning (control variant K), weak thinning with removal of 10% of basal area (variant S1), strong thinning with removal of 30% of basal area (variant S3) and extreme thinning, where only future crop trees and some reserve trees were left (variant TE). S1 and S3 treatments were repeated each 5 years, while in TE treatment the 20−year interval was applied. During the period of 40 years all trees were measured each 5 years and current basal area increment was calculated for the whole stand and for future crop trees population. The relative increment of future crop trees population calculated as a percentage of stand total increment was taken into account too. Data were subjected to ANOVA and differences were compared with Tukey test. The results showed that total stand increment was not influenced by thinning intensity. The future crop trees increment was significantly higher in a case of extreme thinning in comparison to weak thinning and to the control treatment during the first 20 years of experiment (age 21−41). During the second 20 years (age 41−61) only relative basal area increment of future crop trees population was significantly higher on the plots with extreme thinning in comparison to other treatments. The results suggest that a weak thinning brings no silvicultural effect meant as increased growth of previously selected future crop Scots pines. Strong or very strong thinnings give a long−term growth effect and they can be acceptable, but in healthy and well−tended young pine stands only.
Źródło:
Sylwan; 2017, 161, 09; 730-737
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wzrost szczepów wiązu górskiego (Ulmus glabra Huds.) w archiwum klonów w Nadleśnictwie Bielsk
Growth of Ulmus glabra Huds. grafts in the clone archive in Bielsk Forest District
Autorzy:
Mioduszewski, S.
Korczyk, A.F.
Powiązania:
https://bibliotekanauki.pl/articles/1339852.pdf
Data publikacji:
2013
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
drzewa lesne
ochrona zasobow genowych
wiaz gorski
Ulmus glabra
rozmnazanie roslin
rozmnazanie wegetatywne
klony
wzrost roslin
jakosc hodowlana
Nadlesnictwo Bielsk
vegetative progeny
clone archive
Ulmus glabra Huds.
Wych elm
Opis:
Vegetative progeny were obtained from 46 elms (Ulmus glabra Huds.) by grafting. These grafted trees were planted in 2009 in a clone archive in forest plot 264j in the Bielsk Forest District. After one year of growth, elm clone survival ranged from 38% to 100% (89% on average). Although all clones were of similar age and were grown under similar conditions, their average height was highly variable and ranged from 99.0 cm (clone no. 9473z) to 186.6 cm (clone no. 9645z), while average root collar diameter ranged from 8.4mm (clone no. 9473z) to 18.0 mm (clone no. 9645z). There were large differences crown architectural among the different clones, and variation in average shape of the crown was high (from 2.6 in clone no. 9655 to 3.8 in clone no. 9446z). Index breeding values determined on the standardized data for height, root collar diameter, crown shape and survival, ranged from -0.71 (clone no. 9473z) to 0.61 (clone no. 9645z). Clones from Czerwony Dwór reached a better breeding value (0.17) than clones from Gołdap (-0.0266), and variation in their average breeding values was high (0.197).
Źródło:
Leśne Prace Badawcze; 2013, 74, 2; 149-159
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wielocechowa ocena potomstwa populacji buka zwyczajnego (Fagus sylvatica L.) z południowo-wschodniej Polski w początkowych latach wzrostu
Multivariable evaluation of the early growth performance of European beech (Fagus sylvatica L.) provenances from south-eastern Poland
Autorzy:
Buraczyk, W.
Szeligowski, H.
Studnicki, M.
Drozdowski, S.
Bielak, K.
Powiązania:
https://bibliotekanauki.pl/articles/989437.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
drzewa lesne
buk zwyczajny
Fagus sylvatica
proweniencje
drzewa potomne
przezywalnosc
wzrost roslin
cechy fenologiczne
jakosc hodowlana
doswiadczenia proweniencyjne
Nadlesnictwo Losie
genetic variability
growth parameters
morphological traits
phenology
progeny testing
Opis:
European beech is one of the most important broadleaved tree species in Poland and will play probably even more significant role in the future due to the predicted climate change. The main objectives of this study was to analyse and compare the growth parameters and morphological traits between 23 European beech provenances from south−eastern Poland (fig. 1). The research was conducted on the experimental plot established in Łosie Forest District in 2006. The experiment employed a randomized complete block design consisting of 92 plots (23 provenances×4 blocks). On each plot 100 trees representing given provenance were planted in 1.5×1.5 m spacing. In the spring and autumn 2015 we measured and determined the following parameters for the subsample of 36 trees on each plot: survival rate, tree height, diameter at breast height, diameter of the branch at the middle height of the crown length, stem straightness, crown shape, tendency to create forks, mean angle between stem and branches and spring phenology. We also included different eco−physiographical characteristics for each provenances (tab. 1). We performed basic statistics to describe mean values and standard errors (fig. 2, tab. 2) and finally we quantified the interaction between traits and eco−physiographical characteristics by Principal Component Analysis (PCA) (fig 3, tab. 3). The obtained results indicates that under growth conditions on experimental trial in Łosie Forest District, the provenances from lower elevated regions with lower precipitation and higher mean temperature (i.e. more arid conditions; Kielce and Narol provenances) were characterized by thicker dbh and branch dimeters in contrast to regions from southern Poland (Łosie, Bricza 1, Stary Sącz and Nawojowa). European beech provenances from regions with more humid conditions and lower mean annual temperature, as well as shorter vegetation season are characterized by higher survival rate. They are also higher than other provenances, but reveal the lower ratio dbh to branch diameter.
Źródło:
Sylwan; 2016, 160, 12; 981-992
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wzrost i jakosc polskich pochodzen modrzewia w wieku 30 lat na powierzchni proweniencyjnej w Rogowie
Autorzy:
Andrzejczyk, T.
Bellon, S.
Powiązania:
https://bibliotekanauki.pl/articles/822632.pdf
Data publikacji:
1999
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
pokroj
wzrost roslin
LZD Rogow
proweniencje
hodowla lasu
modrzew
lesnictwo
Larix
wartosc hodowlana
drzewa lesne
Źródło:
Sylwan; 1999, 143, 03; 5-19
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wartość hodowlana modrzewi różnych pochodzeń krajowych, w górskich warunkach powierzchni doświadczalnej w Krynicy
Lesovodstvennaja cennost listvennicy raznykh otechestvennykh proiskhozhdenijj v gornykh uslovijakh opytnojj ploshhadi v Krynice
Silvicultural value of various Polish provenances of larch in mountain conditions of experimental area in Krynica
Autorzy:
Kulej, M.
Powiązania:
https://bibliotekanauki.pl/articles/822485.pdf
Data publikacji:
1989
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
drzewa lesne
proweniencje
Polska
modrzew
Larix
wartosc hodowlana
doswiadczenia proweniencyjne
wysokosc drzew
piersnice drzew
miazszosc strzaly
dlugosc korony
jakosc
zdrowotnosc
Źródło:
Sylwan; 1989, 133, 11-12
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-11 z 11

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies