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Growth, survival, density, biomass partitioning and morphological adaptations of natural regeneration in Fagus sylvatica. A review

100%

Jarcuska B.

Dendrobiology

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2009

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tom 61

3-11

Beech is an important woody species in terms of ecology, and it also has a considerable commercial value. This fact is also reflected in a high number of scientific papers handling the issue of natural regeneration of this woody plant. The aim of this review is to analyse influence of resources availability and impact of other factors (competition) on height and diameter growth, survival, density, biomass partitioning and morphological adjustment in naturally regenerated beech seedlings and saplings. It pays a particular attention to light – the factor that influences, directly or indirectly, other environmental factors, and consequently, as the key influence on the performance of beech natural regeneration. This contribution includes information about e.g. shade tolerance and mortality-light relationships, ability to increase growth under improved light conditions, dependence of trees growth on their individual size and age etc. In spite of a large number of papers handling the issue of research on beech natural regeneration, growth responses in individual plants are difficult to predict, because the factors involved are numerous. Thus, the process of natural regeneration is in fact interactive, and even retroactive: any change in one of the involved factors induces adjustments of the others.

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Najwięksi producenci wyrobów z drewna

100%

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

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2020

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tom 61

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nr 1-2

3

Ocena wartosci handlowej ziemniakow jadalnych

100%

Nowacki W.

Ziemniak Polski

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2003

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nr 4

32-36

4

Embryogenesis of the stinging catfish, Heteropneustes fossilis (Actinopterygii: Siluriformes: Heteropneustidae)

100%

Korzelecka-Orkisz A., Smaruj I., Pawlos D., Robakowski P., Tanski A., Szulc J., Formicki K.

Acta Ichthyologica et Piscatoria

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2010

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tom 40

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nr 2

Background. The stinging catfish, Heteropneustes fossilis (Bloch, 1794), has recently raised interest among fish farmers, ornamental fish keepers, and pathologists. Its natural populations are threatened due to habitat loss and high fishing pressure. A number of factors may influence the reproductive success of this. The aim of this study was to assess the effect of one of such factors—the water hardness—on the course of the embryogenesis, the structure of the egg shell, the general morphology, and the behaviour of the hatched larvae. Materials and Methods. The fertilised eggs were incubated at a constant temperature of 23 ± 0.2°C in water of different hardness: 0°GH (soft), 9°GH (moderately soft), 18°GH (moderately hard). Egg membranes of activated eggs were viewed under a scanning electron microscope. Also egg membranes strength and egg deformations were determined 1.5 h after fertilisation. Images of eggs and newly hatched larvae, recorded with the observation sets described above, were measured and analysed. Results. The study showed the eggs were surrounded by thin, translucent, ~5 μm thick membranes equipped with numerous outgrowths on the external surface and porous on the inner side. The following observations were made within 828 h° (degree-hour) at 23 ± 0.2°C: the highest volume of eggs (1.16 ± 0.092 mm3) was typical for eggs incubated in soft water (0°GH), while the lowest egg volume (0.99 ± 0.113 mm3) was recorded in eggs incubated in moderately soft water (9°GH); yolks spheres were greenish in colour, the embryonic disc and the embryo itself being reddish; the embryo performed diverse movements (quasi-peristaltic, cardiac muscle contractions); after few hours of hatching, the pigments developed resulting in colour appearance; club-like primordial barbels were formed 24 h after hatching; the larvae commenced feeding on day 3 post hatching. Conclusion. Water hardness influences embryonic and larval development and the effects may be diverse. Low water hardness is recommended for egg incubation. However, the situation changed when the egg membrane protection ceased to exist at hatching. Increasing water hardness a few hours prior to the expected hatching time prevents larval deformation.

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Combine effect of salting and thyme (Thymus vulgaris) essential oil on shelf life of rainbow trout (Oncorhynchus mykiss) stored at 4 degree Celsius

88%

Can O. P.

Bulletin of the Veterinary Institute in Puławy

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2011

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tom 55

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nr 3

The following fish samples were examined: control salted samples (A), salted samples with 0.1% of thyme oil (B), (salted samples with 0.3% of thyme oil (C), and salted samples with 0.5% of thyme oil (D).The study was based on microbiological (total viable count (TVC), Pseudomonas sp., lactic acid bacteria (LAB), Enterobacteriaceae, and H₂S-producing bacteria), chemical (total volatile basic nitrogen (TVB-N) and thiobarbituric acid (TBA)), and sensory (colour, odour, taste, flavor, texture, and overall acceptance) analyses of changes occurring in the product as a function of treatment and storage time. The salted samples stored at 4°C were taken as the control samples. Results showed that TVC exceeded 7 log cfu/g on day 12 of storage for control samples and day 21 for C and D samples. Populations of LAB, H₂S-producing bacteria, Enterobacteriaceae, and Pseudomonas sp. reached higher final numbers in A and B samples than for C and D samples. Under B, C, and D treatments, TVBN values were lower than for A samples, whereas lipid oxidation, as judged by determination of TBA, did not occur during the refrigerated storage. Sensory scores of trout samples salted with thyme (groups B, C, D) decreased during storage time. However, at the end of the storage period, samples with thyme oil were acceptable by the panelist. The results of this study suggest that the shelf life in case of C and D samples was 21 d. The salting, thyme oil, and air packing were found to be effective, easy, and cheap methods of fish preservation.

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Znaczenie dobrego sadzeniaka dla uzyskania wysokich plonow

88%

Turska E.

Ziemniak Polski

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1994

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nr 1

10-13

7

Zmiany w handlu produktami drzewnymi między USA a Chinami

88%

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

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2018

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tom 59

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nr 3-4

8

Ocena handlowych mieszanek traw gazonowych w warunkach gleb lekkich

75%

Sawicki B.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

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2003

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tom 225

329-337

W kwietniu 1994 roku na glebie piaszczystej w warunkach klimatycznych Polesia Lubelskiego wysiano 4 mieszanki nasion traw gazonowych zakupione w sieci handlowej. Zastosowano dwie normy wysiewu nasion — 250 kg×ha-1 i 400 kg×ha-1. Doświadczenie założono metodą bloków losowanych w czterech powtórzeniach na poletkach o powierzchni 2 m2. Badania prowadzono według systemu oceny traw gazonowych opracowanej w IHAR w Radzikowie i COBORU w Słupi Wielkiej. Po trzech latach badań stwierdzono, że najbardziej trwała i zwarta ruń trawnikowa utworzyła się na poletkach obsianych mieszanką Lawn Seed, która zawierała najwięcej kostrzewy czerwonej oraz kostrzewę owczą. Życica trwała w omawianych warunkach przyrodniczych ustępowała z runi już w drugim roku po wysiewie mieszanki. Poza tym, nie obserwowano widocznego wpływu zwiększonej normy wysiewu nasion na jakość trawnika.

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Metody maksymalizowania wartosci i rownowazenia portfela projektow w procesie rozwoju nowego produktu - cz.1

75%

Rutkowski I. P.

Marketing i Rynek

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2005

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tom 12

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nr 11

13-18

10

Ocena wartosci rzeznej i jakosci tusz jagniat mlecznych wedlug klasyfikacji i wymagan rynku wloskiego

75%

Drozdz A., Ciurus J.

Biuletyn Informacyjny. Instytut Zootechniki

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1995

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tom 33

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nr 3

3-15

Ograniczanie wyników

Growth, survival, density, biomass partitioning and morphological adaptations of natural regeneration in Fagus sylvatica. A review

Najwięksi producenci wyrobów z drewna

Ocena wartosci handlowej ziemniakow jadalnych

Embryogenesis of the stinging catfish, Heteropneustes fossilis (Actinopterygii: Siluriformes: Heteropneustidae)

Combine effect of salting and thyme (Thymus vulgaris) essential oil on shelf life of rainbow trout (Oncorhynchus mykiss) stored at 4 degree Celsius

Znaczenie dobrego sadzeniaka dla uzyskania wysokich plonow

Zmiany w handlu produktami drzewnymi między USA a Chinami

Ocena handlowych mieszanek traw gazonowych w warunkach gleb lekkich

Metody maksymalizowania wartosci i rownowazenia portfela projektow w procesie rozwoju nowego produktu - cz.1

Ocena wartosci rzeznej i jakosci tusz jagniat mlecznych wedlug klasyfikacji i wymagan rynku wloskiego