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Wyświetlanie 1-2 z 2
Tytuł:
Warunki środowiskowe sprzyjające występowaniu trufli (Tuber spp.) na historycznych stanowiskach w Polsce
Environmental conditions that promote the occurrence of truffles (Tuber spp.) on historical sites in Poland
Autorzy:
Rosa-Gruszecka, A.
Hilszczańska, D.
Szmidla, H.
Powiązania:
https://bibliotekanauki.pl/articles/1316076.pdf
Data publikacji:
2014
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
mikologia
grzyby jadalne
trufla
Tuber
wystepowanie
stanowiska historyczne
warunki srodowiska
warunki glebowe
roslinnosc
truffle
host plants
soil parameters
habitat
historical sites
Opis:
This article highlights historical data regarding truffles’ occurrence in Poland. Along with the soil parameters the plant communities at the sites were studied. The results of the chemical soil analyses showed that the soil water pH at 5 sites was acidic (from 4.3 to 6.1), and only in one, Wiązowna, was the pH (7.2) conductive to truffle development. Similarly, the content of calcium carbonate (CaCO3) in soil samples was low (from 0 to 0.03 %), except for Wiązowna, where CaCO3 was 0.12 %. Among the 24 reported species of trees and shrubs, 7 species were hostplants of summer truffle (Tuber aestivum Vitt.). Out of these 7 species, oak and hornbeam were present at four locations. Across the sites, 31 species of ground-layer plants were identified. Among these, Epipactis helleborine was only one host-species of summer truffle. Our findings indicate that the formation of truffle fruiting-bodies depends on specific habitat characteristics. The key factors determining this process are soil parameters, such as: texture, pH and calcium content. Our inventory showed that the sites we studied still persist as natural stands, although only one of them seems to be favorable for truffle development: this site is located in Wi¹zowna, where soil is of pH 7.2 and E. helleborine (host species for truffles from Orchidaceae) is found, fulfills the environmental requirements of truffles.
Źródło:
Leśne Prace Badawcze; 2014, 75, 1; 5-11
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ więźby sadzenia na wzrost i przeżywalność sosny zwyczajnej w okresie około 40 lat od założenia uprawy w zróżnicowanych warunkach siedliskowych
The influence of plant spacing on growth and survival of Scots pine in various habitats during a 40 year period since stand establishment
Autorzy:
Gil, W.
Powiązania:
https://bibliotekanauki.pl/articles/1317297.pdf
Data publikacji:
2014
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
uprawy lesne
drzewa lesne
wiezba drzew
wiezba poczatkowa
sosna zwyczajna
Pinus sylvestris
wzrost roslin
przezywalnosc
warunki siedliskowe
Scots pine
plant spacing
initial density
survival of trees
trees’ growth
habitat conditions
Opis:
The aim of this research was to characterise the influence of plant spacing on the survival and growth of pines in dry and fresh coniferous forest habitats after almost 40 years since stand establishment. In this study, we compared seven types of spacing, including square, rectangular and triangular configurations, with initial densities ranging from 6944 units/ha to 15 625 units/ha. The research covered two sites where no tending interventions of selective character were performed throughout the growth period. We found that habitat conditions had an influence on tree survival as well as growth in thickness and height in the pine forest stands. In the less fertile habitat, where competition between trees was less intense, about 1,5 to 2 times more trees survived than in the more fertile habitat. Pines growing in the fresh coniferous forest were taller and had substantially larger diameter breast heights (dbh) in comparison to pines of the dry coniferous forest. Additionally, habitat conditions had an influence on the spacing effect correctness of the analysed features. In the poorer habitat this influence was stronger, which showed in a greater differentiation of the analysed parameters as compared to the more fertile habitat. Average dbh values of all trees on the Płock surface increased with decreasing initial density and ranged from 8,24 cm in variant A (15 625 units/ha) to 9,79 cm in variant C (6944 units/ha). On the Łąck surface, trees growing at a lower density (variants C and E) were significantly thicker than trees growing at densities between10 000 units/ha and 15 625 units/ha (spacing variants A, B, F, G). Furthermore, our results showed a significant influence of habitat conditions and plant spacing on the thickness of pines belonging to the 1st biosocial class. Moreover, we found a positive influence of triangular-shaped spacing on the trees' thickness increment in the fresh coniferous forest, which confirms reports from other authors. Hence, we can deduce that triangular spacing enables trees to make better use of their surrounding space which positively impacts on their growth parameters. Based on these results, we can conclude that, in pine forests, there is a significant influence of habitat conditions on tree survival and growth in thickness and height. This study also showed significant differences between the types of plant spacing and their effect on pine shafts in the II age class. However, a relationship between height growth rate and initial density was not observed. In both of the investigated habitats, the highest trees were observed at densities around 11 500 units/ha with triangular spacing enhancing this effect.
Źródło:
Leśne Prace Badawcze; 2014, 75, 2; 117-125
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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