Wyniki wyszukiwania

1

Charakterystyki fenologiczne wybranych gatunków drzew i krzewów leśnych

100%

Jozefaciukowa W.

Prace Instytutu Badawczego Leśnictwa

|

1991

|

nr 724-730

2

Wiek najokazalszych drzew i krzewow rosnacych w Polsce

86%

Pacyniak C.

Prace Komisji Nauk Rolniczych i Komisji Nauk Leśnych. Poznańskie Towarzystwo Przyjaciół Nauk

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1998

|

tom 86

83-112

3

Próba określenia żywotności wybranych gatunków drzew i krzewów na obszarach znajdujących się pod wpływem imisji przemysłowych

86%

Jozefaciukowa W.

Prace Instytutu Badawczego Leśnictwa

|

1988

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nr 666-670

4

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Skład gatunkowy i biomasa nadziemna krzewów w podszycie drzewostanów Puszczy Niepołomickiej

86%

Orzel S.

Sylwan

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2015

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tom 159

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nr 10

The understory, a layer composed predominantly of shrubs that perform an important phytomeliorative function, has rarely been the subject of research on the productivity and biomass. The aim of this paper was to specify the occurrence of understory aged ≥10 years as well as its species composition and the share of individual species in the biomass in the Niepołomice Forest (S Poland). The analysed features were related to the age and site conditions of the stands. The research material consisted of dry biomass of shrubs growing within circular sample plots spaced 500 m apart from each other. Dead and live (damaged and undamaged) shrubs of dbh<7 cm were cut at a ground level to determine their wet mass and samples were taken to determine the dry mass. The mass of live shrubs was calculated based on empirical formulas. 368 sample plots were set up in total. Shrubs (13 species) were observed on 76.1% of plots. Shrubs were the most common in the stands of II and IV age groups (87% of plots). No shrubs were observed on the plots with stands older than 160 years. The most common species was Frangula alnus (56.8% of the plots). Quite common ones included Sorbus aucuparia (27.7%) and Padus avium (12.8%). Cornus sanguinea, Prunus spinosa, Salix caprea and Viburnum opulus were observed on less than 1% of the sample plots. Frangula alnus and Padus avium were inventoried in as many as 8 forest site types. The largest amount of shrubs (10 species) were observed in moist broadleaved forest stands, while the fewest (2 species) in boggy mixed broadleaved and ash−alder swamp stands. Over 56% of the aboveground biomass were live shrubs of dbh <7 cm (868.6 kg/ha), almost 29% (444.1 kg/ha) were shrubs of the dbh ≥7 cm, and around 15% (227.6 kg/ha) of the biomass were dead shrubs. The total aboveground biomass of shrubs in the understory of the analysed stands equaled, on average, to 1,540 kg/ha. 94% of the biomass was the aboveground woody biomass including bark (1,448 kg/ha). The dry mass of leaves amounted to 92 kg/ha (6%). Due to high variability of the understory biomass, the estimation error of its average amount was almost 11.4% for total biomass and 13.5% for leaves.

5

Zawartość suchej masy w nadziemnej biomasie krzewów występujących w warstwie podszytu drzewostanów Puszczy Niepołomickiej

86%

Orzel S.

Sylwan

|

2016

|

tom 160

|

nr 01

The aim of this paper was to determine the dry mass content in the fresh mass of leaves, trunks or branches and in the total woody aboveground biomass of shrubs forming the undergrowth of the stands in the Niepołomice Forest (southern Poland). The variability of the dry mass content in the analysed components was determined. For the prevailing species also its correlation with the individual's height and time at which samples were taken was investigated. The material comprised 744 samples, including 532 wood and 212 leaf samples, taken from the most common five shrub species: Corylus avellana, Frangula alnus, Padus avium, Padus serotina and Sorbus aucuparia. The shrubs were from 1 to 33 years old, and their height ranged from 0.3 to 9.9 m. It was shown that the dry mass content in leaves is significantly dependent on the shrub species, and in the case of F. alnus, P. avium and S. aucuparia on the height as well. The highest dry mass content was found in the leaves of C. avellana (39.3%), whereas the lowest – in F. alnus (25.5%). In case of F. alnus, the dry mass content depends on the time of sampling. The leaves collected in June had a significantly lower dry mass content than the ones sampled in subsequent months of the growing season. The dry mass content in the wood significantly depends on the shrub species and the analysed component, however the species−component interaction does not occur (tab. 4). The dry mass content in the trunk wood ranges from 50.3 (P. serotina and S. aucuparia) to 53.0% (P. avium) and exceeds that of the branch by from 1.0 (S. aucuparia) to 4.0% (P. avium). In the wood samples of F. alnus and S. aucuparia, taken between June and September, the dry mass content averaged at 47.3 and 48.7%, respectively, and was lower than in the samples taken between October and April, for which the respective means were 49.5 and 49.0%. In the case of F. alnus, the observed difference in the mean dry mass content is statistically significant at 0.05 level. The determined values of dry mass content in the fresh mass of individual components of the analysed shrubs can be used to find their dry mass as a basis for the calculation of the amount of accumulated carbon.

6

Stanowisko do badan aerodynamicznych wlasciwosci nasion drzew i krzewow lesnych

86%

Czernik Z.

Przegląd Techniki Rolniczej i Leśnej

|

1993

|

nr 06

18-20

7

Wpływ warunków świetlnych panujących pod okapem drzewostanu na wielkość osobnika jeżyny gruczołowatej (Rubus hirtus Waldst. i Kit. agg.)

72%

Gazda A., Janas G.

Sylwan

|

2011

|

tom 155

|

nr 06

8

Ochrona zasobow genowych rodzimych gatunkow drzew i krzewow lesnych w Lasach Panstwowych

72%

Fonder W.

Biblioteczka Leśniczego

|

2001

|

nr 151

1-15

9

Środowiskowe uwarunkowania inwazji tawuły kutnerowatej (Spiraea tomentosa L.) w Borach Dolnośląskich

72%

Wiatrowska B., Danielewicz W.

Sylwan

|

2016

|

tom 160

|

nr 08

The steeplebush is a shrub growing naturally in North America. In Europe this species has been cultivated as an ornamental plant since the 18th century. It has been observed in spontaneously developing secondary localities in such countries as Belgium, Denmark, Sweden, Norway and Germany. In Poland there are three regions in which Spiraea tomentosa is known to be a permanently established anthropophyte: Puszcza Drawska, Bory Niemodlińskie and Bory Dolnośląskie forests. The greatest number of localities of this shrub can be found in the extensive area of the latter, where its expansion has caused significant changes in the natural environment and problems in woodland management. Therefore a research was carried out to find what conditions made the steeplebush ready for invasion and what types of plant communities were especially susceptible to it. The information about the distribution of S. tomentosa in the Bory Dolnośląskie Forest (SW Poland) was collected during field observations in the years 2011−2014. We also verified and used the results of a survey made in 2011 in three forest districts located in the study area: Ruszów, Węgliniec and Wymiarki. The analysis concerned the frequency of the steeplebush in the forest environment in terms of the forest habitat type, species composition, and stand growth stage as well as in non−forest environments like meadows, peatland, margins of drainage ditches, etc. Phytocoenoses in the habitats of humid mixed coniferous forests and humid coniferous forests with mature tree stands dominated by birches or alders were found to be forest communities the most susceptible to colonisation by S. tomentosa. Especially susceptible to steeplebush invasion were also forest cultures on those habitats. Much fewer steeplebush localities were recorded on fresh and mixed coniferous forests as well as fresh broadleaved forests. In a non−forest environments the steeplebush was mostly noted on margins of drainage ditches. The extensive system of such man−made environmental structures in the Bory Dolnośląskie Forest was found to be the most important factor favouring the expansion of S. tomentosa. Thus, the invasion of the discussed species is primarily determined by a large proportion of humid habitats in a single compact woodland complex connected by a dense network of drainage ditches.

10

Czyszczenie nasion drzew i krzewow lesnych

72%

Neugebauer Z.

Przegląd Techniki Rolniczej i Leśnej

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1993

|

nr 04

11-12

11

Ochrona zasobow genowych drzew i krzewow w parkach narodowych

72%

Matras J.

Sylwan

|

2002

|

tom 146

|

nr 06

21-40

12

Zawartość cynku, kadmu i ołowiu w owocach borówki czarnej (Vaccinium myrtillus L.) rosnącej w lasach Nadleśnictwa Świerklaniec

58%

Pajak M., Jasik M.

Sylwan

|

2012

|

tom 156

|

nr 03

13

Wystepowanie i zwalczanie szkodliwych owadow w 2003 roku

58%

Kolk A., Woreta D., Wolski R.

Las Polski

|

2004

|

nr 06

14-18

14

Borowki rosliny borow

58%

Sawicki A.

Poznajmy Las

|

2009

|

nr 3

14-15

15

Szkody leśne wyrządzane przez żubry w Bieszczadach

58%

Wajdzik M., Krupa M., Kubacki T.

Sylwan

|

2011

|

tom 155

|

nr 10

16

Zmiennosc karpackich gatunkow domieszkowych drzew i krzewow lesnych

58%

Staszkiewicz J.

Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa

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2002

|

tom 86

177-188

17

Wielkość opadu i tempo rozkładu ściółki w wybranych drzewostanach Bieszczadów

58%

Niewinna M.

Roczniki Bieszczadzkie

|

2010

|

tom 18

18

Wplyw gryzoni na naturalne odnawianie sie drzew i krzewow w zbiorowiskach lesnych

58%

Skrzydlowski T.

Sylwan

|

2001

|

tom 145

|

nr 12

93-102

19

Wśród starych drzew

58%

Miaczynski P.

Ogrody, Ogródki, Zieleńce

|

2006

|

nr 12

20

Prognoza wystepowania szkodliwych owadow lesnych w 2004 r.

58%

Kolk A., Woreta D., Wolski R.

Las Polski

|

2004

|

nr 05

10-13

Ograniczanie wyników

Charakterystyki fenologiczne wybranych gatunków drzew i krzewów leśnych

Wiek najokazalszych drzew i krzewow rosnacych w Polsce

Próba określenia żywotności wybranych gatunków drzew i krzewów na obszarach znajdujących się pod wpływem imisji przemysłowych

Skład gatunkowy i biomasa nadziemna krzewów w podszycie drzewostanów Puszczy Niepołomickiej

Zawartość suchej masy w nadziemnej biomasie krzewów występujących w warstwie podszytu drzewostanów Puszczy Niepołomickiej

Stanowisko do badan aerodynamicznych wlasciwosci nasion drzew i krzewow lesnych

Wpływ warunków świetlnych panujących pod okapem drzewostanu na wielkość osobnika jeżyny gruczołowatej (Rubus hirtus Waldst. i Kit. agg.)

Ochrona zasobow genowych rodzimych gatunkow drzew i krzewow lesnych w Lasach Panstwowych

Środowiskowe uwarunkowania inwazji tawuły kutnerowatej (Spiraea tomentosa L.) w Borach Dolnośląskich

Czyszczenie nasion drzew i krzewow lesnych

Ochrona zasobow genowych drzew i krzewow w parkach narodowych

Zawartość cynku, kadmu i ołowiu w owocach borówki czarnej (Vaccinium myrtillus L.) rosnącej w lasach Nadleśnictwa Świerklaniec

Wystepowanie i zwalczanie szkodliwych owadow w 2003 roku

Borowki rosliny borow

Szkody leśne wyrządzane przez żubry w Bieszczadach

Zmiennosc karpackich gatunkow domieszkowych drzew i krzewow lesnych

Wielkość opadu i tempo rozkładu ściółki w wybranych drzewostanach Bieszczadów

Wplyw gryzoni na naturalne odnawianie sie drzew i krzewow w zbiorowiskach lesnych

Wśród starych drzew

Prognoza wystepowania szkodliwych owadow lesnych w 2004 r.