Informacja

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

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "black" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 16
Tytuł:
Halotolerant fungi stimulate growth and mitigate salt stress in Alnus glutinosa Gaertn.
Autorzy:
Thiem, D.
Tyburski, J.
Golebiewski, M.
Hrynkiewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/2077648.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
black alder
ectomycorrhiza
saprophytic fungi
inoculation
proline
Opis:
Soil salinity is an important abiotic stress factor that reduces both plant growth and development and decreases diversity and metabolic potential of microorganisms, particularly fungi. However, some fun- gal isolates, including mycorrhizal fungi, can increase tolerance of plants to salinity, e.g. by activation of de- fense mechanisms. Main aim of our study was: (i) to identify and characterize fungal strains isolated from fruitbodies growing at saline test sites and (ii) to determine the effect of fungal inoculation on the growth and salinity tolerance of Alnus glutinosa Gaertn. seedlings. Two ectomycorrhizal strains (Amanita muscaria OW-10 and Paxillus involutus OW-5) and a saprotrophic one (Gymnopus sp. OW-6) were isolated from fruit- bodies collected at naturally saline test sites. The plant growth promotion was observed after inoculation of plants with the ectomycorrhizal fungus – P. involutus OW-5, while the use of Gymnopus sp. OW-6, displaying the highest hydrolytic activity, decreased seedling growth parameters. Moreover, P. involutus OW-5 (char- acterized by characterized by medium salt tolerance salt tolerance) promoted growth of black alder in the presence of salt, while A. muscaria OW-10 (with the highest salt tolerance) increased fresh and dry mass of seedlings only in the absence of salt. Black alder seedlings inoculated with P. involutus OW-5 revealed higher synthesis of proline in aboveground organs compared to the control plants which suggested that accumulation of this compound can be a mechanism protecting black alder seedlings against salt stress. In conclusion, we recommend the use of P. involutus OW-5, which displayed the best plant growth promoting ability and salt tolerance, for inoculation of black alder trees used in reclamation of saline habitats
Źródło:
Dendrobiology; 2020, 83; 30-42
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rola martwego drewna w regeneracji drzewostanu łęgu jesionowo-olszowego (Fraxino-Alnetum) zasiedlonego przez bobry
Role of the deadwood in regeneration of the ash-alder forest stand (Fraxino-Alnetum) colonized by beavers
Autorzy:
Gawryś, R.
Gabrysiak, K.
Powiązania:
https://bibliotekanauki.pl/articles/979182.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
natural regeneration
black alder
beaver pond
Białowieża Forest
Opis:
The paper concerns the structure of natural regeneration in ash−alder riparian forests (Fraxino−Alnetum) colonized by beavers (Castor fiber) taking into account the substrate, on which it appears (soil and deadwood). Study was conducted in 2016 on twelve sampling plots located in the Orłówka valley in the Białowieża National Park (eastern Poland), where beavers settled around 2005. We counted natural regeneration occurring on the ground and on deadwood on each plot. Also we identified volume of deadwood, decay status and water cover. A decade after the occurrence of beaver ponds, the density of natural regeneration is 5575 saplings per hectare and the regeneration on deadwood is 28% of the total. Black alder is the dominant species. The regeneration occurring on the soil is richer in species and has a larger share of shrub species. In the case of regeneration on the deadwood, seedlings appear first on trees fallen before the flood. Over the time, the role of deadwood as a substrate for the development of regeneration increases and the role of fallen trees is the greater, the greater is the fraction (coverage) of the flooded areas. Studies show that the continuous occurrence of the deadwood accelerates habitat regeneration after a disturbance such as the occurrence of a beaver pond.
Źródło:
Sylwan; 2020, 164, 06; 505-512
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza zmienności i korelacji wybranych cech fizycznych nasion olszy czarnej
Variability analysis and correlation of selected physical properties of black alder seeds
Autorzy:
Kaliniewicz, Z.
Trojanowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/288972.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
olsza czarna
nasiona
cechy fizyczne
współzależności
black alder
seeds
physical properties
inderdependence
Opis:
Dokonano pomiarów prędkości krytycznej unoszenia, grubości, szerokości, długości, kąta tarcia ślizgowego i masy oraz wyznaczono współczynniki sferyczności nasion olszy czarnej, zebranych z 3 różnowiekowych drzewostanów nasiennych. Do opisu i analizy cech wykorzystano analizę wariancji z klasyfikacją pojedynczą, korelację oraz regresję jednej zmiennej i wielu zmiennych.
Measures of critical speed of lifting, thickness, width, length, sliding friction angle and mass were taken. Moreover, spherical coefficient of black alder seeds collected from three seed tree stands of different age was determined. The analysis of variance with single classification, correlation and regression of one variable and many variables was used for description and analysis.
Źródło:
Inżynieria Rolnicza; 2011, R. 15, nr 8, 8; 167-172
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of growing altitude, particle drying temperature and press temperature on some technological properties of particleboard produced from black alder wood
Autorzy:
Kumaş, İlknur
Aras, Uğur
Kalaycioğlu, Hulya
Serdar, Bedri
Yel, Husnu
Powiązania:
https://bibliotekanauki.pl/articles/2010795.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
black alder
drying temperature
press conditions
anatomical factors
growing altitude
physical properties
mechanical properties
Opis:
This study investigated the effects of the growing altitude, particle drying temperature and press temperature on some technological properties of particleboard produced from black alder wood. The particles were produced from wood taken from the KTÜ Campus and from Çamoba in Trabzon. Production and tests of the experimental particleboards were carried out at Kastamonu Integrated Wood Company. In production of the particleboards, wood from different growing altitudes [50 m and 250 m] was used, and different drying temperatures [120 and 150°C] and press temperatures [150 and 200°C] were applied. Mechanical, physical and anatomical properties of the produced boards were investigated. According to the results, the mechanical properties deteriorate when the altitude increases. Increasing the particle drying temperature and press temperature had a positive effect on dimensional stability. A high press temperature improved the mechanical properties of the boards. In addition, growing altitude had an effect on anatomical properties: when the altitude increased, the diameter of vessels narrowed, the number of vessels per mm2 increased, and fiber length decreased. This resulted in a deterioration in mechanical properties at the higher altitude.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2021, 64, 207; 59-71
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model wzrostu dla olszy czarnej (Alnus glutinosa (L.) Gaertn.)
A distance−independent tree growth model for black alder (Alnus glutinosa (L.) Gaertn.)
Autorzy:
Bruchwald, A.
Dudzińska, M.
Wirowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1026558.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
modele wzrostu
dendrometria
lesnictwo
olsza czarna
Alnus glutinosa
drzewa lesne
growth model
black alder
Opis:
The paper presents a stochastic growth model for black alder stands. The model was built on the rich empirical material collected in Poland, and some equations also considered data obtained from black alder stands in Germany. The model describes the concept of a model alder stand. The main characteristic of the model is stand density. This characteristic was used to draw up a thinning programme based on the principles of selective thinning.
Źródło:
Sylwan; 2003, 147, 08; 3-10
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rola pędów syleptycznych w kształtowaniu ugałęzienia korony olszy czarnej (Alnus glutinosa (L.) GAERTN.)
The role of sylleptic shoots in shaping the black alder (Alnus glutinosa (L.) GAERTN.) crown architecture
Autorzy:
Dmyterko, E.
Powiązania:
https://bibliotekanauki.pl/articles/1026427.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
ugalezienie
korony drzew
lesnictwo
pedy syleptyczne
olsza czarna
Alnus glutinosa
drzewa lesne
sylleptic shoots
typical shoots
crown
black alder
Opis:
Black alder is a species capable of producing sylleptic shoots. This process is also detected in alders at older age. The objective of this work is to characterise sylleptic shoots and to determine the role they play in the formation of crown branching. The empirical material used in the experiment was collected in the north and south of Poland and considers both young and old trees.
Źródło:
Sylwan; 2003, 147, 06; 60-68
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural diversity and production of alder stands on former agricultural land at high altitudes
Autorzy:
Vacek, Z.
Vacek, S.
Podrazsky, V.
Kral, J.
Bulusek, D.
Putalova, T.
Balas, M.
Kalouskova, I.
Schwarz, O.
Powiązania:
https://bibliotekanauki.pl/articles/41581.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
structural diversity
stand structure
alder stand
agricultural land
black alder
Alnus glutinosa
grey alder
Alnus incana
afforestation
succession
Sudetes Mountains
Opis:
The paper deals with the structural diversity and production of a less frequently studied type of alder stands originated on former agricultural lands in the 1950s, established partly by plantation and partly by natural succession in the area of the Krkonoše Mts. and the Orlické hory Mts. (Czech Republic). Four permanent research plots (PRP) were established at sites where Black alder (Alnus glutinosa L. Gaertn.) and Grey alder (Alnus incana L. Moench.) naturally occurs, each plot of 0.25 ha in size. The aim of the study was to evaluate the structure and development of the alder stands with respect to biodiversity, horizontal, vertical and species structure, diameter increment with emphasis on climate factors, and the quantity and quality of timber production. The results document low diversification of the studied stands in the PRPs. The horizontal structure is defined as random and clumped at sites at the highest altitude with high water table. The number of living trees with DBH ≥ 4 cm ranges between 556 to 828 trees ha-1 with the relative stand density index (SDI) 0.67–0.77. The stand volume ranges from 247 to 393 m3 ha–1, and decreases with higher altitudes. Low temperatures is limiting factor for radial growth in the high mountain areas, respectively low precipitation in the middle lands. Owing to a rather specific site character, as especially the spring area, the stands exhibit only average production, but the production quality is generally high. The quality timber is suitable for industrial use; the rot-affected trunk base parts usable for fuel represent only approximately 16%.
Źródło:
Dendrobiology; 2016, 75
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecological features of flowers and the amount of pollen released in Corylus avellana [L.] and Alnus glutinosa [L.] Gaertn.
Ekologiczne cechy kwiatow oraz obfitosc pylenia Corylus avellana L. i Alnus glutinosa [L.] Gaertn.
Autorzy:
Piotrowska, K
Powiązania:
https://bibliotekanauki.pl/articles/27803.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
pollen
pollen grain number
pollen yield
pollen season
tree
common hazel
flower feature
black alder
Corylus avellana
shrub
plant
flower
Alnus glutinosa
Opis:
Hazel and alder bloom as one of the fi rst plants in climatic conditions of Poland. In the present study, detailed observations were made of the structure of fl owers of Corylus avellana L. and Alnus glutinosa (L.) Gaertn. Pollen yield of the abovementioned species was determined. The number of pollen grains in the theca, anther, fl ower and infl orescence was calculated. A comparison was made of the number of pollen grains of these taxa recorded during the atmospheric pollen seasons analysed over a period of 8 years in the conditions of Lublin. The study demonstrates that pollen yield of the common hazel infl orescence was 66 mg, whereas for black alder it was 120 mg. It was found that the number of pollen grains produced by the alder infl orescence was 2.2 times higher than by the hazel infl orescence. The atmospheric pollen season of the studied plant taxa was recorded at similar dates, but alder pollen was in much larger concentrations.
Leszczyna i olsza stanowią ważne źródło świeżego pyłku dla pszczół wczesną wiosną, gdy pożytek z innych roślin jest jeszcze niedostępny. Z kilkuletnich badań wynika, że maksymalne uwalnianie pyłku przez leszczynę i olszę w Lublinie przypada w różnych dniach marca lub na początku kwietnia. W prezentowanej pracy przeprowadzono szczegółowe obserwacje budowy kwiatów leszczyny pospolitej i olszy czarnej, określono ich wydajność pyłkową oraz liczbę ziarn pyłku w pylniku. Z przeprowadzonych badań wynika, że średnia masa pyłku jednego kwiatostanu leszczyny pospolitej wynosiła 66 mg, zaś olszy czarnej 120 mg, co jest związane z większą liczbą kwiatów w kwiatostanie olszy. Stwierdzono, że kwiatostan olszy produkuje 2,2 razy większą liczbę ziarn pyłku niż kwiatostan leszczyny. Atmosferyczny sezon pyłkowy badanych taksonów roślin rejestrowany był w zbliżonych terminach, ale pyłek olszy występował w znacznie wyższych koncentracjach.
Źródło:
Acta Agrobotanica; 2008, 61, 1
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Szerokość pasma jądrowego estymatora rozkładu pierśnic w drzewostanach olszy czarnej (Alnus glutinosa (L.) Gaertn.) z zachodniej części Kotliny Sandomierskiej
Bandwidth of kernel estimator of DBH distribution in black alder (Alnus glutinosa (L.) Gaertn.) stands from west part of the Sandomierz Basin
Autorzy:
Pogoda, P.
Ochał, W.
Orzeł, S.
Powiązania:
https://bibliotekanauki.pl/articles/985919.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
dendrometria
drzewa lesne
olsza czarna
Alnus glutinosa
piersnice drzew
rozklad piersnic
estymacja
estymatory jadrowe nieparametryczne
kernel estimator
bandwidth
dbh structure
black alder
Opis:
Set of ‘nonparametric’ methods, that don’t make a priori assumption about functional form of empirical distribution was developed as an alternative to the parametric distribution modeling. The kernel estimators are one of such methods, that can be used to describe the frequency of data representing for example DBH records. Kernel smoothing requires the choice of weighting function and bandwidth also called as smoothing parameter or window. The lack of comprehensive analysis on the applicability of particular bandwidth selection methods to model DBH structure gave an impulse to present investigation aimed at determining value and variability of smoothing parameter in black alder stands. The optimal bandwidth was obtained according to six different variants of plug−in method proposed by Altman and Léger. Presented investigations were based on DBH measurements collected in 163 managed black alder stands aged from 6 to 89 years, growing in the west part of the Sandomierz Basin (S Poland). We measured in total 22,530 black alders, from 48 to 359 in individual stand. Stands were characterized by: age, quadratic mean diameter, basal area, mean height, Reineke’s stand density index and standard deviation of DBH. Smoothing parameter was obtained by means of plug−in method with the pilot bandwidth selected by: Silverman’s rule of thumb (nrd0), Scott’s method (nrd), unbiased cross−validation (ucv), biased cross−validation (bcv), method of Sheather and Jones (sj) and one−stage method of Wand and Jones (onestage). The bandwidth was first obtained to real data, then to 100 bootstrap samples of 5, 10, 15 ... and 100 trees from each stand. Smoothing parameters were characterized by mean and variance. Relationship between values of smoothing parameter and stand characteristics was determined. Finally the influence of sample size on value and variability of bandwidth was assessed. Value and variability of smoothing parameter in black alder stands are determined by stand age, sample size and method of bandwidth choice. There is a close relationship between bandwidth and the mean height (r from 0.75 to 0.83), quadratic mean diameter (r from 0.79 to 0.88) and standard deviation of DBH (r from 0.84 to 0.93). Potentially these stand features can be used to predict smoothing parameter values. Minor changes of bandwidth for samples containing above 50 trees together with persistence of standard error give an objective grounds for defining optimal number of diameters, that are necessary to kernel estimation of DBH distribution.
Źródło:
Sylwan; 2018, 162, 05; 411-421
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dokładność wzorów empirycznych służących do określania biomasy nadziemnych komponentów drzew olszy czarnej (Alnus glutinosa (L.) Gaertn.)
Accuracy of empirical formulas for determining aboveground biomass of black alder (Alnus glutinosa (L.) Gaertn.)
Autorzy:
Ochał, W.
Socha, J.
Grabczyński, S.
Powiązania:
https://bibliotekanauki.pl/articles/990997.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
olsza czarna
Alnus glutinosa
biomasa
czesci nadziemne
wzory empiryczne
dokladnosc wzorow
black alder
aboveground biomass
accuracy assessment
empirical formulas
poland
Opis:
The study investigated the accuracy of thirty equations formulated in England, Sweden, Turkey, Lithuania and Spain and which aim to determine the aboveground biomass of black alder. The reference constituted of bark, timber, stem, branches and leaves dry biomass of 168 sample trees aged 6−96 from 56 alder stands located in the western part of Kotlina Sandomierska (south−eastern Poland). The analysed formulas, considering local conditions, resulted in biased biomass calculations. The evaluation of such components as leaves, branches, trunk timber or trunk bark is subject to systematic errors larger than a dozen or so per cent, and in certain ranges of breast height diameters − up to even a couple of dozens or a few hundred per cent. Only three out of 30 formulas may be considered useful for estimating aboveground biomass of black alder in Poland.
Źródło:
Sylwan; 2014, 158, 06; 431-442
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wzory empiryczne pierśnicowych liczb kształtu drewna użytkowego dla olszy czarnej (Alnus glutinosa (L.) Gaertn.)
Empirical equations for predicting merchantable breast height form factors for black alder (Alnus glutinosa (L.) Gaertn.
Autorzy:
Dudzinska, M.
Bruchwald, A.
Powiązania:
https://bibliotekanauki.pl/articles/972823.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
piersnicowa liczba ksztaltu drewna uzytkowego
lesnictwo
olsza czarna
dendrologia
Alnus glutinosa
wzory empiryczne
drzewa lesne
black alder
empirical equations
merchantable volume
breast height form factor
Opis:
The aim of the study was to develop empirical equations for predicting breast height form factors for black alder (Alnus glutinosa). Data used to develop these equations were collected from 1496 felled trees from 136 stands. One hundred and 36 stands were located in northern and southern Poland, respectively. Separate equations to predict stand form factors (F5, F18) and tree form factors (f 5, f 18) were developed. These functions estimate form factor according to tree diameter and the average stand diameter or mean height. Equations can be used to estimate stem volume u.b. to top diameter u.b. of 5 cm or 18 cm (merchantable vol.).
Źródło:
Sylwan; 2003, 147, 07; 3-6
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soil acid phosphomonoesterase activity and phosphorus forms in ancient and post-agricultural black alder [Alnus glutinosa (L.) Gaertn.] woodlands
Autorzy:
Orczewska, A.
Piotrowska, A.
Lemanowicz, J
Powiązania:
https://bibliotekanauki.pl/articles/57312.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
soil
acid phosphomonoesterase
acid phosphatase activity
phosphorus form
ancient forest plant species
tree stand
forest soil
black alder
Alnus glutinosa
woodland
Polska
post-agricultural soil
Opis:
Black alder, an N-fixing tree is considered to accelerate the availability of phosphorus in soils due to the increased production of phosphatase enzymes, which are responsible for the P release from the litter. Acid phosphatase activity plays a pivotal role in organic P mineralization in forest soils and in making P available to plants. In order to check whether Alnus glutinosa stimulates acid phosphomonoesterase (PHACID) activity, we compared enzyme activities, total P concentration (PTOT), plant-available P (PAVAIL), organic P (PORG) and inorganic P (PINORG), and organic matter content in 27 ancient and 27 post-agricultural alder woods (the latter ones representing different age classes: 11-20, 21-40 and 41-60 years) of soil samples taken from the litter and the mineral layers. Phosphomonoesterase activity, organic matter, PTOT, PINORG and PORG concentrations were significantly higher in ancient alder woods than in the soils of post-agricultural forests. Significant differences in the acid phosphatase activity, organic matter and PAVAIL concentration were noted between the litter and mineral layers within the same forest type. In recent stands the amount of organic matter and phosphatase activity increased significantly with the age of alder stands, although only in the mineral layer of their soils. Phosphomonoesterase activity, organic matter and PAVAIL content were higher in a litter layer and decreased significantly at a mineral depth of the soil. The acid phosphatase activity was significantly correlated with organic matter content in both ancient and recent stands. There was no significant relationship between PHACID activity and any P forms.
Źródło:
Acta Societatis Botanicorum Poloniae; 2012, 81, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of Cu, Mn, Ni, Sr and Zn release during decomposition of four types of litter in headwater riparian forests in northern Poland
Autorzy:
Jonczak, J.
Parzych, A.
Sobisz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1317603.pdf
Data publikacji:
2014
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
heavy metal
strontium
black alder
leaf litter
decomposition
dynamics
copper
manganese
nickel
zinc
headwater area
riparian forest
Polska
leaf litter decomposition
headwater areas
heavy metals
Opis:
The aim of the study was to compare the dynamics of Cu, Mn, Ni, Sr and Zn release during decomposition of leaves of Black alder (native material), Norway maple, Red oak and European beech (exogenous material) in the area of headwater riparian forests along the upper course of the Kamienna Creek (Northern Poland). Litter bag method was used in the experiment. Initial materials differed in terms of their chemical composition. Cu, Mn, Ni, Sr and Zn contents were low in general, and in fact, even a few times lower than limit values for decomposition rate. Different trends in the dynamics of the leaf metal content during decomposition were observed in particular tree species despite the fact, that every materials were exposed in the same site. Release dynamics was strongly affected by the content of metals in initial materials and in topsoil. Accumulation of Cu, Mn and Zn was observed during decomposition of poorest in the elements maple leaves, as well as Ni in alder leaves and Sr in the leaves of maple, alder and oak. In beech leaves we observed intensive leaching of Ni, whereas downward trends in the Cu concentration of beech leaves, as well as Mn and Zn in beech and oak leaves, were related to weight loss of the leaves. In some cases, the dynamics of metal release displayed a more complicated two- or three-stage character (release of Ni from maple and oak leaves; Cu from maple leaves; Sr from alder, maple and oak leaves; and Zn from alder and maple leaves).
Źródło:
Leśne Prace Badawcze; 2014, 75, 2; 193-200
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ łuszczenia i czasu przechowywania nasion olszy czarnej (Alnus glutinosa (L.) Gaertner) na kiełkowanie, wschody i wzrost siewek
Effect of seed extraction, seed lot, and storage duration on germination capacity and seedling emergence of Alnus glutinosa (L.) Gaertner
Autorzy:
Tylkowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/991300.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
nasiennictwo
drzewa lesne
olsza czarna
Alnus glutinosa
nasiona
luszczenie nasion
czas przechowywania
kielkowanie
wschody
siewki
wzrost roslin
black alder
seed storage
containerized cultivation
seedling growth
Opis:
Black alder, a major forest tree species in Europe, thrives in moist soils. During the seeds extraction (nutlets) from the cones, the heaviest seeds were observed to fall out first. Seed weight was not correlated to the ability of germination; no significant differences were observed between the heaviest and the lightest seeds. Seeds with a fresh mass moisture content of 8−9% after storage in –3°C retained their high germinability for six winters. However, seedling emergence decreased gradually when tested in cell trays in an unheated greenhouse. Along with the decline of seedling emergence, the participation of high seedlings (≥25 cm) decreased and participation of small seedlings increased simultaneously. These results question whether the practice of storing seeds in –3°C for long time is the best method of germplasm preservation.
Źródło:
Sylwan; 2014, 158, 11; 821-828
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dokładność stałych krzywych wysokości dla drzewostanów olszy czarnej (Alnus glutinosa (L.) Gaertn.)
Accuracy of the uniform height curves for black alder (Alnus glutinosa (L.) Gaertn.) stands
Autorzy:
Ochał, W.
Orzeł, S.
Siudak, K.
Zamyślewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/989648.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
dendrometria
drzewostany olszowe
drzewa lesne
olsza czarna
Alnus glutinosa
piersnice drzew
wysokosc drzew
stale krzywe wysokosci
h−d relationship
uniform height curve
forest inventory
black alder
Opis:
The study presents the assessment of the accuracy of two generalized height−diameter models, such as skwB [Bruchwald et al. 2001] and skwO [Orzeł et al. 2014], developed in Poland for black alder (Alnus glutinosa (L.) Gaertn.) stands. Verification of these models was conducted on empirical material that was collected in 127 alder stands located in the western part of Sandomierz Basin (southern Poland). Selected alder stands aged 6−89 years, while average breast height diameter ranged from 4.5 to 43.0 cm and average height from 6.3 to 32.7 m. The stand density varied from 222 to 4360 trees/ha. The accuracy assessment for uniform height−diameter curves was based on the analysis of single tree absolute error distributions. Synthetic indicators of goodness−of−fit, such as: average and standard errors, coefficients of variation and determination were calculated based on absolute errors. The final evaluation of the compared uniform height−diameter models results from the structure of the goodness−of−fit measures that was observed within all analyzed stands and within age classes of 20 years. The efficiency of uniform height−diameter models was also compared with stand height−diameter curve, which was developed based on the Näslund function. General height−diameter models overestimated height in alder stands on average from 0.26 (1.67) to 0.19 m (1.39%), based on skwB and skwO models, respectively. Bias depended on the age of stand and decreases from almost 3% in I age class to nearly 0.5% in IV and V age class. For both analyzed models, a positive systematic error was observed for the standardized breast height diameter. Bias in estimating the height of single stand depended on the accuracy of stand height estimations. In case of estimation based on the measurements of three trees height, bias in single stand can range from –13% to +14%. Due to the range and nature of observed systematic errors, uniform height curves should be applied to groups of stands that have different age and breast height diameter structure, as it allows for partial reduction of the error.
Źródło:
Sylwan; 2016, 160, 08; 635-646
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 16

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