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Tytuł:
Temperature effects performance of Lymantria dispar larvae feeding on leaves of Quercus robur
Autorzy:
Karolewski, P
Grzebyta, J.
Oleksyn, J.
Giertych, M.J.
Powiązania:
https://bibliotekanauki.pl/articles/41435.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
herbivore insect
sex ratio
Lymantria dispar
larva
gypsy moth
feeding
leaf
oak
English oak
Quercus robur
pedunculate oak
temperature
performance
Opis:
Future climatic warming may modifyinsect development, sex ratio, quantitative changes in populations that could affect the frequency of outbreaks. Here we analyzed the influence of temperature on larval growth and development in the gypsy moth (Lymantria dispar L.). The larvae were reared at three constant temperatures: 15, 20 or 25°C, and fed with leaves of the English oak (Quercus robur L.). Larval mortality, duration of development (DD), relative growth rate (RGR), total mass of food eaten (TFE), and pupal mass (PM) were estimated. Larval mortality was lowest at 20°C, higher at 25°C, and highest at 15°C. DD significantly decreased with increasing temperature and depended on sex. The influence of temperature on the shortening of DD was stronger in males than in females. RGR significantly depended on temperature and was the highest at 25°C, and lowest at 15°C. At 15°C, RGR did not change markedly with time. In contrast, RGR at 20°C was characterized bya continuous decreasing trend. At 25°C, RGR was very high for 2 weeks but quickly declined afterwards. Temperature did not affect the TFE. PM was significantly correlated with temperature and sex. PM of females was higher at 20°C than at 15 and 25°C, in contrast to that of males, which was similar at 20 and 25°C, and higher than at 15°C. For larval growth and development, the most favourable was the medium temperature (20°C). The least favourable temperature for females was 25°C, for males 15°C. The results suggest that global warming may modifythe future sex ratio of gypsy moths that may affect insect development and outbreaks.
Źródło:
Dendrobiology; 2007, 58; 43-49
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of cutting off distal ends of Quercus robur acorns on seedling growth and their infection by the fungus Erysiphe alphitoides in different light conditions
Autorzy:
Giertych, M.J.
Suszka, J.
Powiązania:
https://bibliotekanauki.pl/articles/41420.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
oak
pedunculate oak
container nursery
oak powdery mildew
Quercus robur
seedling growth
plant infection
fungi
Erysiphe alphitoides
light condition
phenology
Opis:
Quercus robur seedlings are very often infested by oak powdery mildew caused by Erysiphe alphitoides. This disease attacks primary leaves with high insolation. In our experiment seedling growth in different light conditions was observed. Seedlings were derived from intact seeds or from seeds where the distal ends of acorns were cut off. Acorns were sown in pots at four light conditions (2%, 8% and 30% light transmittance and in full sunlight). For half of the seedlings we reduced the influence of powdery mildew by using a fungicide. Height of seedlings, shoot dry mass and the degree of damage caused by Erysiphe alphitoides were measured. The highest damages were in full light conditions and the lowest in the 30% light treatment. The influence of acorn reduction on powdery mildew infection was not significant (p=0.0763), however, in the full light conditions the seedlings from cut acorns were ca. 30% less damaged. The cutting of acorns also alters the height of seedlings and shoot mass. The tallest seedlings were from cut seeds growing in the 30% light treatment. The influence of the fungicide was lowest in the 30% light treatment where the decrease in damage was only ca. 10%. For nursery practice we can say that oak seedling production from cut off acorns under 30% light transmittance should give the best results of seedling growth even without the fungicide application.
Źródło:
Dendrobiology; 2010, 64
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Winter storage of pedunculate oak (Quercus robur L.) seedlings
Zimowe przechowywanie sadzonek dębu szypułkowego (Quercus robur L.)
Autorzy:
Wesoly, W.
Chabowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/791403.pdf
Data publikacji:
2016
Wydawca:
Wyższa Szkoła Zarządzania Środowiskiem w Tucholi
Tematy:
winter storage
storage
pedunculate oak
Quercus robur
seedling
oak
plant seedling
plant vigor
plant growth
Źródło:
Zarządzanie Ochroną Przyrody w Lasach; 2016, 10
2081-1438
2391-4106
Pojawia się w:
Zarządzanie Ochroną Przyrody w Lasach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of elevated temperature and fluorine pollution on relations between the pedunculate oak (Quercus robur) and oak powdery mildew (Microsphaera alphitoides)
Autorzy:
Grzebyta, J
Karolewski, P.
Zytkowiak, R.
Giertych, M.J.
Werner, A.
Zadworny, M.
Oleksyn, J.
Powiązania:
https://bibliotekanauki.pl/articles/41557.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
pedunculate oak
Quercus robur
environment pollution
phenol
tannin
lignin
carbohydrate
starch
nitrogen
fluorine
oak powdery mildew
Microsphaera alphitoides
soil pollution
Opis:
Effects of elevated temperature and soil pollution with fluorine on host-pathogen relations were studied in seedlings of the pedunculate oak (Quercus robur L.) inoculated with oak powdery mildew (Microsphaera alphitoides Griff. et Maubl.) and control seedlings. The plants were grown for 1month in elevated temperature (on average by 1.6°C) and soil pollution with sodium fluoride (330 ppm F). The above factors did not have any significant effect on nitrogen content of leaves or on concentrations of metabolites favourable to growth and development of the fungal pathogen (total non-structural carbohydrates, including soluble carbohydrates and starch) and those unfavourable to fungi (soluble phenols, condensed tannins and lignins). The elevated temperature and fluorine pollution did not affect the leaf infection rate. However, a significant temperature × pollution interaction was observed in inoculated seedlings. At the elevated temperature, fluorine caused a less severe infection by powdery mildew. This could be due to a direct toxic effect of fluorine on the pathogen or by an indirect influence, resulting from changes in levels of other metabolites, which were not analysed in this study. The inoculation of oak seedlings with powdery mildew caused a decline in the carbohydrate content of leaves but did not have any significant effect on levels of other analysed metabolites. However, it significantly affected the distribution of phenols and lignins in oak leaves. Those compounds accumulated within necrotic lesions and in adjacent cells. Our results do not enable drawing definite conclusions on effects of a slight rise in temperature and a relatively low level of fluorine pollution of the soil on relations between the pedunculate oak and oak powdery mildew. Lower values of the leaf infection rate in seedlings growing in elevated temperature and fluorine pollution suggest that in warmer years a lower level of infection by M. alphitoides may be expected in areas affected by fluorine pollution.
Źródło:
Dendrobiology; 2005, 53; 27-33
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Climatic sensitivity of Quercus robur L. in floodplain near Kyiv under river regulation
Autorzy:
Netsvetov, Maksym
Prokopuk, Yulia
Didukh, Yakiv
Romenskyy, Maksym
Powiązania:
https://bibliotekanauki.pl/articles/956963.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
pedunculate oak
tree-ring width
riparian forest
dendroclimatology
moving correlation
Opis:
Climate change has a significant impact on natural ecosystems, particularly on floodplain forests that are among the most transformed ecosystems in the world. The climate sensitivity of dominant species is likely to play a key role in determining the susceptibility of flooded forests to climate changes. Here, we use dendrochronological approaches and local climate records from 1880 to 2015 to assess the response in pedunculate oak (Quercus robur L.) trees growing in a floodplain of the Dnipro River near Kyiv to climatic variables. Correlation analysis reveals the strongest positive association of the Q. robur tree-ring width chronology with May–June precipitation, May–June temperature, and May self-calibrating Palmers drought severity indices (scPDSI). The moving-window correlation analysis points to positive association with the scPDSI after the 1950s, when local river regulation was implemented. The positive correlation with current March precipitation is the least expected change in the oak growth-to-climate relationship that occurred in the aftermath of human alterations in the local river and regional climate changes. This study discusses the probable ecological consequences and ecophysiological mechanisms of observable climate-to-growth relationships and their temporal stability.
Źródło:
Dendrobiology; 2018, 79; 20-33
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie biostymulatorów w hodowli i ochronie sadzonek dębu szypułkowego (Quercus robur L.) w gruntowej szkółce leśnej
Application of biostimulators in the growth and protection of pedunculated oak (Quercus robur L.) seedlings in bare-root nursery
Autorzy:
Buraczyk, W.
Żybura, H.
Ostaszewska, E.
Studnicki, M.
Aleksandrowicz-Trzcińska, M.
Powiązania:
https://bibliotekanauki.pl/articles/979060.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
plant biostimulants
chitosan
humic acid
fulvic acid
silicon
pedunculate oak
Opis:
Pedunculate oak is a species of major economic importance in Polish forests. This species seedlings constitute 18.9% of the nursery production in the country. One of the most widespread fungal disease these oaks face is the oak powdery mildew induced by Erysiphe alphitoides. Nursery production is on the lookout for environment−friendly means of plant protection as well as growth simulators capable of raising levels of productivity. Our objectives was to assess two preparation treatments regarded as biostimulators (registered as fertilisers under the names Apol−Humus and Apol−Hum Chelat) in the raising of seedlings of pedunculate oak in bare−root nursery conditions. The experiment included 6 variants with seedlings treated with the above agents, protected against mildew in the traditional way using Falcon 460 EC, treated with fertiliser and fungicide at the same time, or left as control specimens with no measures taken. All preparations were applied by means of foliar spraying 5 times in the course of the season. Survival of seedlings was then assessed at the season end, along with biometric features like root−collar diameter, length of main root and stem, dry mass of leaves and stem, and degree of oak powdery mildew attack. Results indicated curtailment of mildew infection of oak seedlings thanks to both of the biostimulators, albeit to a more limited extent than when fungicide was applied. No stimulation of seedling growth was achieved, however, though the most favourable biometric parameters characterised the oaks supplied with both biostimulator and fungicide. Significantly higher survival rate was noted for oaks offered effective protection against mildew, in the variants with the fungicide or with simultaneous application of Apol−Humus or Apol−Hum Chelat with Falcon. The research points to the two biostimulators under study (based on natural components) being suitable for use in the nursery production of pedunculate oak seedlings, with it being presumed that either or both can allow for reduction in amount of fungicide necessary to be used to safeguard seedlings against mildew.
Źródło:
Sylwan; 2020, 164, 04; 292-299
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wstępne badania nad zmiennością izoenzymową dębów w doświadczeniu proweniencyjnym w Nadleśnictwie Milicz
Preliminary research on izoenzyme variability of oaks in the provenance experiment in the Milicz Forest District
Autorzy:
Zwaduch, P.
Lewandowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/1012982.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
zroznicowanie genetyczne
dab bezszypulkowy
zmiennosc genetyczna
proweniencje
izoenzymy
Quercus petraea
Nadlesnictwo Milicz
Quercus robur
lesnictwo
dab szypulkowy
drzewa lesne
pedunculate oak
sessile oak
provenance
genetic variation
izoenzyme
poland
Opis:
The studies were based on the material collected in the provenance experiment established in the territory of the Milicz Forest District where 78 pedunculate (Quercus robur L.) and sessile oak (Quercus petraea [Matt.] Liebl.) provenances from all over the country were planted in 5 replications. The izoenzyme analyses took in dormant buds from 300 trees of randomly selected 5 pedunculate oak and 5 sessile oak provenances. Variation of 6 enzymatic systems was the subject of the analysis. The studied oak populations exhibited a relatively high level of genetic variation, however, it was lower in comparison with the populations from other regions of Europe. Generally, the variation of the sessile oak was grater than of the pedunculate oak. The calculated genetic distance between the two oak species was 0.0284 and it exceeded genetic distances among the populations within the species.
Źródło:
Sylwan; 2008, 152, 10; 27-35
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inwentaryzacja zasobów drzewnych w urządzaniu lasu w Polsce
Inventory of timber resources in forest management in Poland
Autorzy:
Jaszczak, R.
Powiązania:
https://bibliotekanauki.pl/articles/1015664.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
inwentaryzacja
Polska
zasoby drzewne
lesnictwo
urzadzanie lasu
quercus robur
pedunculate oak
variability
heritability
Opis:
The paper presents the comparison of heritability of height and diameter at breast height (dbh) in 7−11− year−old pedunculate oak trees from 5 provenances and 55 families. The provenance heritability for five successive years was high: 0.19−0.80 for height and 0.59−0.87 for dbh. Family heritability was moderate ranging 0.39−0.52 for height and 0.34−0.49 for dbh, while individual−tree heritability values was the lowest equalling 0.08−0.15 for height and 0.06−0.14 for dbh.
Źródło:
Sylwan; 2008, 152, 05; 14-25
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozdział 1. Skuteczność odnowienia sztucznego dębu szypułkowego Quercus robur L. na powierzchni rębni gniazdowej zupełnej (IIIa) na przykładzie leśnictwa Surażkowо w Puszczy Knyszyńskiej
Chapter 1. The effectiveness of artificial regeneration of the pedunculate oak Quercus robur L. on the surface of shelterwood cutting (IIIa) on the example of Surażkowo forest district in the Knyszyn Forest
Autorzy:
Fiłonowicz, Wojciech
Marozau, Aleh
Powiązania:
https://bibliotekanauki.pl/chapters/31233538.pdf
Data publikacji:
2022
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
dąb szypułkowy
sztuczne odnowienie
wycinanie drewna osłonowego
pedunculate oak
artificial regeneration
shelterwood cutting (IIIa)
Opis:
W artykule przedstawiono wyniki i wnioski dotyczące skuteczności sztucznego odnowienia dębu szypułkowego Quercus robur L. na powierzchni zrębu drzewostanowego (IIIa) w Nadleśnictwie Surażkowo w Puszczy Knyszyńskiej, w północno-wschodniej Polsce. Określono skuteczność regeneracji w zależności od warunków środowiskowych i zabiegów pielęgnacyjnych. W sprzyjających warunkach (brak zachwaszczenia) dąb można sadzić bez przygotowania gleby lub na terenach naturalnego odnowienia grabu przy minimalnym przygotowaniu (talerze). Na granicy dębu, gatunków domieszkowych i runa leśnego konieczna jest rutynowa pielęgnacja. Stosowanie plastikowych osłon siatkowych skutecznie chroni przed szkodami wyrządzanymi przez jelenie. Jednak zbyt długie trzymanie siatki (ponad pięć lat) może spowodować nadmierną smukłość (czyli dysproporcję pomiędzy średnicą a wysokością drzewka). Aby osiągnąć zamierzony cel hodowlany, niezbędne są prawidłowe prowadzenie plantacji (uprawa, czyszczenie) oraz zabiegi ochronne.
The article presents the results and conclusions on the effectiveness of artificial regeneration of the pedunculate oak Quercus robur L. on the surface of shelterwood cutting (IIIa) in the Surażkowo Forest District in the Knyszyn Forest, northeastern Poland. The regeneration efficiency was identified depending on the environmental conditions and care treatments. Under favorable conditions (no weed infestation), the oak can be planted without soil preparation or in areas of natural regeneration of hornbeam with minimal preparation (plates). Routine care is necessary on the border between the oak, admixed species, and undergrowth. Using plastic mesh tree protectors effectively saves against any damage caused by deer. Nevertheless, keeping the mesh for too long (for over five years) may cause excessive slenderness (which is a disproportion between the diameter and the height of the tree). Proper performance of plantations сare (cultivation, cleaning) and protective measures are essential to achieve the assumed breeding goal.
Źródło:
Lasy przyszłości. Wyzwania współczesnego leśnictwa; 9-19
9788367185462
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sigmoid growth curves, a new approach to study the dynamics of the epicotyl emergence of oak
Autorzy:
Ukalska, Joanna
Jastrzębowski, Szymon
Powiązania:
https://bibliotekanauki.pl/articles/2044179.pdf
Data publikacji:
2019
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
cumulative germination
Gompertz model
growth curves
logistic model
nonlinear regression
pedunculate oak
Richards model
Opis:
Three of the most frequently used sigmoidal growth curves from the Richards family are the logistic model, Gompertz model and Richards model. They are used in the analysis of organismal growth over time in many disciplines/studies and were proposed in many parameterisations. Choosing the right parameterisation is not easy. The correct parameterisation of the model should take into account such parameters that are useful to describe the analysed growth phenomenon and are biologically relevant without additional calculations. In addition, each parameter of the model only affects one shape characteristic of each growth curve, which makes it possible to determine standard errors and confidence intervals using statistical software. Growth curves in germination dynamics studies should provide information on topics such as the length of the lag in onset of germination, the maximum germination rate and, when it occurs, the time at which 50% of seeds will germinate and the final germination proportion. In this article, we present three parameterisations of the logistic, Gompertz and Richards models and indicate two parameterisations for each model, corresponding to the abovementioned issues. Our proposition is parameterisation by taking into account the maximum absolute growth rate. Parameterisations indicated as useful for germination dynamics are characterised by the fact that each parameter has the same meaning in every model, so its estimates can be compared directly amongst the models. We also discussed the goodness-of-fit measures for nonlinear models and in particular measures of nonlinear behaviour of a model’s individual parameters as well as overall measures of nonlinearity. All described models were used to study the dynamics of the epicotyl emergence of pedunculate oak. After checking the close-to-linear behaviour of the studied model parameters and by taking into account the criteria of model selection (AICc of each growth curve and the residual variance [RV]), the best model describing the dynamics of epicotyl appearance of pedunculate oak was the Richards curve.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2019, 61, 1; 30-41
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wielkości nasion i głębokości siewu na wschody i wysokość siewek dębów (Quercus robur L. i Q. petraea (Mat.) Liebl.)
Effect of acorn size and sowing depth on Quercus robur and Q. petraea seedling emergence and height
Autorzy:
Tylkowski, T.
Bujarska-Borkowska, B.
Powiązania:
https://bibliotekanauki.pl/articles/973800.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
masa 1000 nasion
nasiona
Quercus petraea
Quercus robur
siew jesienny
siewki
wschody
dąb bezszypułkowy
dab szypułkowy
drzewa leśne
głębokość siewu
leśnictwo
wysokość roślin
żołędzie
pedunculate oak
sessile oak
1000 seeds mass
autumn sowing
Opis:
The aim of investigations was to establish the effect of sowing depth in the nursery on seedling quality and emergence, depending on weight of Quercus robur and Q. petraea acorns. Carried out researches had a preliminary character because seeds were collected separately only from 5 trees. We found no significant effect on seedling quality and emergence for Q. robur with the largest weight of acorns (mass of 1000 seeds equaling 6660 g) sown at the depth of 9 cm. Such relations had not occurred in Q. petraea. Sowing at the depth of 3−9 cm in the nursery had no significant effect on seedling height within each investigated seed lot. At the greater sowing depths, the dry weight of seedling roots was lower, while dry weight of shoots was higher.
Źródło:
Sylwan; 2011, 155, 03; 159-170
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kształtowanie się smukłości pni dębu szypułkowego (Quercus robur L.) w zależności od wieku drzew
Forming slendernes of pedunculate oak stems [Quercus robur L.] in dependence of age of trees
Autorzy:
Kaźmierczak, K.
Pazdrowski, W.
Mańka, K.
Szymański, M.
Nawrot, M.
Powiązania:
https://bibliotekanauki.pl/articles/1012526.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
dendrometria
smuklosc drzew
wiek drzew
Quercus robur
lesnictwo
dab szypulkowy
drzewa lesne
slenderness
pedunculate oak
stand stability
age
Opis:
Paper identifies value and variability of slenderness of pedunculate oak stems in age range from 10 to 140 years describing slenderness of tree stems simultaneously using linear and multiplies regression. Strength of the connections between slenderness and selected dendrometrical traits was also defined. Dependence of the slenderness was investigated with respect to height, breast height diameter, and 10−years increment of breast height diameter, volume and 10−years volume increment in specific years of tree life. The slenderness of trees decreases with the growth of breast height diameter, breast height diameter increment, volume and volume increment. In case of height opposite tendency was observed. Dependence of slenderness on breast height diameter, height and age was analysed for all trees altogether as well. Slenderness was described additionally with linear and multivariate empirical equations.
Źródło:
Sylwan; 2008, 152, 07; 39-45
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tempo wzrostu wysokości dębu szypułkowego (Quercus robur L.) w dolnej warstwie drzewostanu sosnowego
Height growth rate of pedunculate oak (Quercus robur L.) in lower layer of Scots pine stand
Autorzy:
Paluch, R.
Powiązania:
https://bibliotekanauki.pl/articles/994087.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
odnowienia podokapowe
dab szypulkowy
Quercus robur
wzrost roslin
tempo wzrostu
modele wzrostu
pedunculate oak
height growth
undergrowth
Opis:
This study was carried out in north−eastern Poland in 20 Scots pine stands with well−developed lower layer of pedunculate oak. In each stand, 5 highest oak trees were selected. Basing on the stem analysis, a growth model for oak undergrowth in Scots pine stands was elaborated. It can be used for determination the height growth rate in relation to the age and height of oak. Obtained model was compared to the already existing one for oaks growing without canopy [Bruchwald at el. 1996]. Growth rate of undergrowth oaks was significantly delayed in the initial period by 20−30 years.
Źródło:
Sylwan; 2013, 157, 12; 909-916
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Osmotic adaptation of Quercus robur L. under water stress in stands with different tree density - relation with groundwater table
Autorzy:
Cater, M.
Powiązania:
https://bibliotekanauki.pl/articles/41074.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
osmotic adaptation
osmotic water potential
pedunculate oak
flood plain forest
Quercus robur
water stress
stand
tree
plant density
density
relation
ground water
Opis:
Solute accumulation in plant leaves during drought through accumulation of organic compounds is known to compensate turgor loss andpromote higher stomatal conductance at lower water potentials. Recent studies have involved experiments on saplings and younger stands, while evidence of osmotic adjustment in adult pedunculate oak under natural stand conditions on different sites is scarce. Pressure volume curves technique was used to define differences in osmotic potential – water stress adaptation – of 120 year oldped unculate oak trees in two managedforest complexes andin virgin forest remnant. Tree response between the managedstandafter thinning andthe standwithout any silvicultural measures within same forest complex was also compared during summer months in two consecutive (dry and favourable) years with groundwater table. Significant differences were observed in adaptation between forest complexes and during dry (2003) and favourable (2004) years. Osmotic component of thinnedforest was the highest, showing most negative values of stress adjustment. Measured values on all plots responded well to drop in groundwater table, especially in pronounced drought conditions. Such response may be in relation with lower stand density and increased individual space for growth in thinned stand. Adult oaks did not loose their ability to water stress adaptation, in spite of their age and progressively decreasing health conditions.
Źródło:
Dendrobiology; 2011, 65
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wzrost i przyrost wysokości dębu szypułkowego (Quercus robur L.) w dolnej warstwie drzewostanu sosnowego
Growth and increment of height of pedunculate oak (Quercus robur L.) undergrowth in Scots pine stands
Autorzy:
Paluch, R.
Powiązania:
https://bibliotekanauki.pl/articles/991145.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
dab szypulkowy
Quercus robur
wzrost roslin
przyrost wysokosci
odnowienia podokapowe
oslona gorna drzewostanu
drzewostany sosnowe
height
growth phases
undergrowth
pedunculate oak
Opis:
The study compares height growth of pedunculate oak (Quercus robur L.) undergrowth in Scots pine (Pinus sylvestris L.) stands and in open canopy conditions. Material was collected in 20 Scots pine stands with well−developed pedunculate oak undergrowth located in north−eastern Poland, representing the mixed deciduous forest type (Querco roboris−Pinetum). Fraction of oak undergrowth with slow height increment in Scots pine stands amounted 40% and was twice as high as in the open canopy conditions. On average 10 years longer than in the open canopy conditions juvenile phase characterizes the height growth of pedunculate oak undergrowth. A shift of height growth phases of oak undergrowth was recorded. However in most of the stands Scots pine shelter did not cause large delay in the age at which the culmination of current height increment of pedunculate oak is achieved.
Źródło:
Sylwan; 2014, 158, 08; 563-570
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 23

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