Wszystkie pola: growth experiment - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Protocol for acclimatization of in vitro cultured Potamogeton praelongus - aspect of plantlet size and type of substrate
Autorzy:: Prausova, R.
Kozelkova, Z.
Safarova, L.
Powiązania:: https://bibliotekanauki.pl/articles/57604.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: acclimatization
in vitro culture
Potamogeton praelongus
plant tissue culture
growth experiment
plantlet size
substrate type
Opis:: The aim of the experiment was to determine suitable substrate type and optimal plant size for transfer of plantlets from in vitro to ex vitro under experimental outdoor conditions. Tests focused on the effect of substrate type (muddy and sandy) and starting size of plantlets gained through in vitro seed germination (0-3, 3.1-5,5.1-6, 6.1-10 cm) on plant growth. Three parameters (fresh weight, length, and the number of leaves) were compared to evaluate growth. Basic water parameters in experimental water tanks were regularly measured (pH, temperature, electrical conductivity, shadow intensity) and controlled to reach similar conditions to those in the natural habitat of this species. Overwintering was studied in a cellar with newly defined size categories (<6, 6.1-8, 8.1-10, 10.1-12, 12.1-15 cm). Both substrate type and starting size of plantlets significantly impacted growth. Plantlets grew better in the muddy substrate while a 100% success rate of rooting was gained with a starting size of 6.1-10 cm in both substrates. The biggest increase in fresh weight was observed with a starting size of 3.1-5 cm and 5.1-6 cm in both substrates. The greatest increase in fresh weight was observed in plants with a starting size of 3.1-5 cm in the muddy substrate (more than 95% increase). The best overwintering results were gained in the 6.1-8 cm size category.
Źródło:: Acta Societatis Botanicorum Poloniae; 2015, 84, 1
0001-6977
2083-9480
Pojawia się w:: Acta Societatis Botanicorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Kinetic Models of Epitaxial Growth: Theory and Experiment
Autorzy:: Vvedensky, D. D.
Smilauer, P.
Powiązania:: https://bibliotekanauki.pl/articles/1931853.pdf
Data publikacji:: 1995-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.50.Cj
Opis:: We examine the morphological evolution of growing surfaces using Monte Carlo simulations of a solid-on-solid model. We use direct comparisons with experiment both to identify the kinetic processes that must be included in a model for GaAs(001) homoepitaxy and to parametrize the rates of these processes. We first examine the evolution of a vicinal surface during the first few monolayers of growth and compare the density of surface steps of the simulated surfaces with reflection high-energy electron-diffraction measurements. By including both a non-thermal incorporation step of freshly deposited atoms and a barrier to interlayer atomic transport, excellent quantitative agreement is obtained for an entire range of growth conditions, including the relaxation of the surface toward equilibrium upon the termination of the beam. We then examine the morphology as successively more layers are grown and find that the surface evolves into a self-organized state wherein the local slope of the growing features remains approximately constant with time.
Źródło:: Acta Physica Polonica A; 1995, 87, 1; 25-33
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Response of two wetland graminoids to n:k supply ratios in a two-year growth experiment
Reakcja dwóch gatunków traw z siedlisk podmokłych na zróżnicowane dawki n:k w dwuletnim doświadczeniu kontrolowanym
Autorzy:: Lawniczak, A.E.
Powiązania:: https://bibliotekanauki.pl/articles/14646.pdf
Data publikacji:: 2011
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Changes in nutrient availability in wetlands have been observed during the recent years, mostly due to human pressure. A shift from N limitation to P or K limitation causes changes in plant species composition, nutrient use efficiency, plant growth, interspecific competition and plant species performance. Several studies have shown that stoichiometry indices such as N:P and N:K ratios in plant biomass can be a good indicator of nutrient limitation. However, the implications of an N:K ratio for wetland vegetation have hardly been investigated. In order to estimate a critical N:K ratio that can indicate the type of nutrient limitations, a greenhouse experiment has been established. The response of two grass species: Holcus lanatus and Molinia caerulea, to the range of N and K supply was analysed for two years. The effect of six combinations of N:K supply ratios (from 0.5 to 225), combined with two levels of fertility in a factorial design, on aerial biomass production, nutrient concentrations and nutrient resorption efficiency was tested. The aerial biomass increased with an increasing N:K supply ratio during both vegetation seasons at the low level of supply. Significant differences were observed not only between species but also between the N:K ratios during the two years. In the first year, the optimal N:K supply ratio was 4.5 for Holcus lanatus and 225 for Molinia careluea at the high fertility level. In 2010, the optimal N:K supply ratio was similar for both grasses. At the high fertility level, the shoot biomass was the highest at an N:K supply ratio of 13.5; at the low level, shoot productivity reached the peak at a 225 N:K supply ratio. Moreover, both plant species showed the same pattern of aerial biomass production to N:K supply ratios at both fertility levels, but differences in the N:K biomass ratios make it impossible to determine a critical N:K ratio. The N:K nutrient supply ratio was a better indicator of plant performance than the N:K biomass ratio of the analysed species. The tested graminoids did not show a similar response to N:K supply ratios at the high and low levels of supply, indicating that nitrogen was the most important factor limiting the plant growth during the two years, and that these plant species were less sensitive to K shortage than to N deficiency.
W ostatnich latach w wyniku antropopresji na obszarach wodno-błotnych obserwuje się zmiany dostępności związków biogennych. Zmiana czynnika limitującego, w szczególności azotu, na rzecz fosforu i potasu wpływa na zmiany składu gatunkowego roślinności, efektowność poboru związków biogennych przez rośliny, wzrost roślin, konkurencję międzygatunkową oraz inne ich parametry. Badania wskazują, że wskaźniki stechiometryczne zawartości biogenów w roślinach, takie jak N:P i N:K, mogą być dobrymi indykatorami czynnika limitującego wzrost roślin na mokradłach. Jednak zastosowanie stosunku N:K w odniesieniu do roślinności mokradeł jest dotąd w niewielkim stopniu rozpoznane. W celu wyznaczenia krytycznej wartości stosunku zawartości azotu do potasu (N:K) w biomasie roślin, wskazującego, który z biogenów jest czynnikiem limitującym wzrost roślin na obszarach podmokłych, przeprowadzono doświadczenie kontrolowane w warunkach szklarniowych. Reakcja dwóch gatunków roślin Holcus lanatus i Molinia caerulea na nawożenie zróżnicowanymi dawkami azotu i potasu była badana w okresie dwóch lat. Wpływ nawożenia N i K na produkcję nadziemnej biomasy roślin, zawartość związków biogennych oraz resorpcję biogenów badano w sześciu kombinacjach stosunku N do K (od 0.5 do 225) na dwóch poziomach nawożenia – niskim i wysokim (3 x niski). Dawki azotu przy niskim poziomie nawożenia wahały się od 9.30 mg do 146.69 mg wazon–1 rok–1, a potasu od 18.53 do 0.65 mg wazon–1 rok–1. Nadziemna biomasa roślin zwiększała się wraz ze wzrostem stosunku N:K w przypadku niskiego poziomu nawożenia w ciągu dwóch lat. Statystycznie istotne różnice stwierdzono nie tylko między badanymi gatunkami traw, ale także między analizowanymi latami. W pierwszym roku badań największą biomasę wytworzył Holcus lanatus, gdy stosunek N:K wynosił 4,5, natomiast Molinia caerulea, gdy stosunek N:K wynosił 225. W drugim roku wegetacji największą biomasę wytworzyły obydwa gatunki w przypadku nawożenia N:K równego 13,5, ale tylko przy wysokim poziomie nawożenia. Mimo iż reakcja badanych traw na nawożenie była analogiczna, to różnice w zawartości N i K w komórkach tych roślin uniemożliwiają wyznaczenie granicznej wartości N:K, która wskazałaby składnik limitujący wzrost roślin. Wykazano, że stosunek N:K w aplikowanych nawozach był lepszym wskaźnikiem oceny reakcji roślin na zmianę dostępności związków biogennych niż stosunek N:K wyznaczony na postawie koncentracji N i K w roślinach. Zróżnicowane reakcje badanych traw w przypadku wysokiego i niskiego poziomu nawożenia wykazały, że azot był głównym czynnikiem limitującym wzrost roślin. Analizowane trawy były mniej wrażliwe na niedobory potasu niż na niedobór azotu. Niedobór potasu był obserwowany tylko wówczas, gdy dawki nawożenia azotowego były bardzo wysokie.
Źródło:: Journal of Elementology; 2011, 16, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Use of porous tubes for measuring water extraction by roots and simultaneous maintaining of soil water potential in growth chamber experiments
Użycie porowatych rurek do pomiarów poboru wody i jednoczesnego utrzymywania potencjału wody glebowej w doświadczeniach fitotronowych
Autorzy:: Nosalewicz, A.
Iijima, M.
Lipiec, J.
Krol, A.
Powiązania:: https://bibliotekanauki.pl/articles/36477.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: porous tube
soil water potential
root
water extraction
laboratory experiment
soil condition
plant growth
Opis:: The efficiency of a system based on porous tubes in maintaining soil water potential during water extraction by plants in growth chamber experiment was evaluated. The effect of porous tubes area, soil type and density on water flow through porous tubes as induced by various water potentials was evaluated. The rate of change of soil water potential in response to pressure change depends strongly on the area of ceramic tubes per soil volume. If rapid changes or precise control of soil water potential are needed, the area of ceramic tubes per soil volume should be large. Experiments in which porous tubes are used for maintaining water potential should reach a compromise between plant water demands and permissible disturbance caused by the presence of porous tubes in the soil environment.
W badaniach określono efektywność systemu opartego na porowatych rurkach do utrzymania stałego potencjału wody w trakcie poboru wody przez roślin w doświadczeniach fitotronowych. Analizie poddano wpływ powierzchni rurek i gęstości gleby na przepływ wody przez rurki wywołany różnicą potencjałów wody. Szybkość zmian potencjału wody w glebie w reakcji na różnicę ciśnień jest mocno uzależniony od powierzchni rurek, przez którą odbywa się przepływ wody do objętości gleby. Zaleca się użycie rurek o powierzchni możliwie dużej w doświadczeniach, w których wymagane jest precyzyjne utrzymanie lub planowane są szybkie zmiany potencjału wody glebowej. Doświadczenia fitotronowe z użyciem systemu opartego na porowatych rurkach wiążą się z kompromisem pomiędzy zapotrzebowaniem na wodę roślin i dopuszczalnym zaburzeniem struktury gleby wywołanym obecnością rurek porowatych w ośrodku glebowym.
Źródło:: Acta Agrophysica; 2011, 18, 2[193]
1234-4125
Pojawia się w:: Acta Agrophysica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Growth and development of Polish provenances of Picea abies in the IUFRO 1972 experiment
Autorzy:: Matras, J
Powiązania:: https://bibliotekanauki.pl/articles/41653.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: Norway spruce
Picea abies
provenance
plant growth
plant development
plasticity
genetic variability
international conference
Polska
reforestation
experiment
plot experiment
Opis:: The paper presents the results of research on the genetic variability in the growth characteristics and plasticity of Polish provenances of Norway spruce, tested on thirty plots established in Europe and Canada in the IUFRO 1972 provenance experiment. Special consideration was devoted to the plots in Poland, especially in Knyszyn. The variability in the growth and quality characteristics of the provenances, found at experiment level, is high (within 6.099 standard deviation units). At provenance level, it ranges between 4.674 for Kartuzy and 2.192 for Rycerka Zwardoń. This indicates that the performance of the provenances depends much on environmental conditions. Although no provenance can be considered adaptable to any conditions thatmay occur in the cultivation of spruce, the Istebna Bukowiec and Zwierzyniec Lubelski provenances, having a very high breeding value and high plasticity, may be recommended for a wider use in reforestation.
Źródło:: Dendrobiology; 2009, 61 Supplement
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Variation in growth and survival among European provenances of Pinus sylvestris in a 30-year-old experiment
Autorzy:: Barzdajn, W.
Kowalkowski, W.
Chmura, D.J.
Powiązania:: https://bibliotekanauki.pl/articles/41160.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: plant growth
survival
provenance transfer
provenance trial
forest tree
Scotch pine
Pinus sylvestris
variation
long-term experiment
productivity
Opis:: Provenance trials with forest trees provide valuable information about growth and adaptability of populations often transferred over large geographical and climatic distances. In this study we evaluated growth and survival of 19 Scots pine (Pinus sylvestris L.) populations representing most of the natural range of the species in Europe, growing in a 30-year-old provenance trial in the northeastern Poland. We used cluster analysis to investigate differentiation among those populations in growth and survival. We also used published data on needle morphology and allozyme and DNA marker variation for those same populations to compare groupings of populations based on growth and needle traits and markers. We found significant variation among tested populations in all investigated traits – the largest variation was found for stand volume which integrates information on growth and survival. Variation in growth traits was related to the latitude of population origin with populations from the latitudinal band between 49° N and 54° N showing the best performance. Populations originating from both north and south off of that region showed lower productivity, which for southern provenances resulted from their particularly low survival, reflecting the lack of adaptation to the environment of the research site. Grouping of populations based on growth traits revealed three clusters corresponding to the three latitudinal regions – northern, central and southern. Needle morphological traits were not appropriate as markers of productivity. Clustering of populations based on needle morphology, and especially based on biochemical and molecular markers, did not correspond to the grouping based on growth traits.
Źródło:: Dendrobiology; 2016, 75
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Effect of municipal solid waste on the growth of maize (Zea mays L.)
Autorzy:: Simeon, P.O.
Ambah, B.
Powiązania:: https://bibliotekanauki.pl/articles/11002.pdf
Data publikacji:: 2013
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: municipal solid waste
plant growth
maize
Zea mays
pot experiment
greenhouse
growth parameter
plant height
leaf area
statistical analysis
Opis:: A pot experiment was conducted in the green house to determine the effect of municipal solid waste on the growth of maize (zea mays). Growth parameters of percentage emergence, plant height, leaf area and number of levers per plant were collect and subjected into statistical analysis, using ANOVA and fisher’s L.S.D. at 5 % probability level. Plant growth parameters decreased with increase in cropping cycle. Similarly, maize grown on dumpsite soils did better than the control soil samples. It show increase in plant height, leaf area and number of leaves per plant at a range of 16.82 cm to 12.87 cm, 5 to 4 and 64.69 cm to 59.88 cm for the dumpsite and control samples respectively. Soil PH, organic matter (OM), total Nitrogen (N), Phosphorus (P), Potassium (K), Calcium (Ca), Magnesium (Mg), Sodium (Na) and Effective Cat-ion Exchange Capacity (ECEC) decreased with increase in cropping cycle respectively. The Dumpsite soil sample recorded higher mean values than the control (P < 0.05). There is every indication that municipal solid waste is beneficial to plant if only proper and careful sorting and separation of hazardous waste is done.
Źródło:: International Letters of Natural Sciences; 2013, 02
2300-9675
Pojawia się w:: International Letters of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Abundance and community structure of ammonia oxidizing archaea and bacteria in response to peanut growth under controlled condition in Shandong, China
Autorzy:: Huang, C.
Xu, N.
Fu, Z.
Sun, B.
You, S.
Ma, D.
Yu, J.
Powiązania:: https://bibliotekanauki.pl/articles/12689395.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:: China
plant cultivation
peanut
Arachis hypogaea
plant growth
community structure
microorganism abundance
ammonia-oxidizing bacteria
ammonia-oxidizing archaea
field experiment
three-year field experiment
controlled condition
Opis:: Based on a three-year field experiment under controlled condition in Ji’nan, China, the effects of peanut growth on the variation in the abundance and community structure of ammonia oxidizing bacteria (AOB) and archaea (AOA) before and after peanut growth were investigated through quantitative PCR and cluster analysis of terminal-restriction fragment length polymorphism. Our results show that the community composition of AOA and AOB was greatly affected by the peanut growth leading to the decreased abundance of AOA and increased abundance of AOB. Furthermore, AOA and AOB community structures varied before and after peanut growth. Phylogenetic analysis indicated that all AOA and AOB community sequences were clustered into the uncultured group. Altogether, the results suggested that the abundance of AOA and AOB in soil and their community compositions can be greatly affected by the peanut growth.
Źródło:: Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 6; 119-127
1644-0692
Pojawia się w:: Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Influence of provenance transfer on the growth and survival of Picea abies provenances
Autorzy:: Krajmerova, D
Longauer, R.
Pacalaj, M.
Gomory, D.
Powiązania:: https://bibliotekanauki.pl/articles/41447.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: international conference
Europe
forest ecosystem
plant breeding
tree
Norway spruce
Picea abies
provenance experiment
global warming
adaptation
growth
survival
Opis:: Two provenance experiments with Norway spruce in Slovakia were used to reveal trends in the behaviour of provenances after their transfer. Regressions between the average height and survival of provenances and the differences between the geographic and selected climatic characteristics of the place of origin and provenance plots were significant for most of the characteristics tested. Data from the experiment with Polish and Slovak provenances from 1972 indicated that transfer into warmer regions with a longer vegetation period results in improved height growth and survival, with the exception of survival at initial stages. The experiment from 1964 with a broader altitudinal range of provenance plots, but with unadjusted latest measurements at individual plots available, revealed the best height growth of Slovak Norway spruce provenances after their transfer to sites with the mean annual temperature approximately 1°C higher and with the vegetation period 12 days longer than at places of origin. Transfer into lower altitudes, a warmer climate and a longer vegetation period improved survival. In both experiments, transfer to areas with increased rainfall had a negative effect on growth, which is probably associated with the fact that provenances are not able to exploit additional precipitation for the growth in areas with a colder climate and a shorter vegetation period.
Źródło:: Dendrobiology; 2009, 61 Supplement
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Influence of salinity on growth and organic compounds content of carrot (Daucus carota L.)
Autorzy:: Shiyab, S.
Al-Qarallah, B.
Akash, M.
Powiązania:: https://bibliotekanauki.pl/articles/12691227.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:: plant cultivation
carrot
Daucus carota
Jordan cultivar
Napoli cultivar
vegetable
plant growth
plant development
organic compound
organic compound content
relative water content
sodium chloride
salinity
salinity impact
salinity tolerance
salt stress
saline soil
saline water
cultivation experiment
long-term experiment
Opis:: Carrot production of valuable carotenes, carbohydrate and protein are hindered by elevated salinity levels in many parts of the world. To assess this problem, germination and growth of two carrot cultivars (Daucus carota cvs Jordan and Napoli) were studied in vivo and in vitro under different salt stress concentrations (0, 75, and 150 mM NaCl). Seeds were directly or gradually exposed to these salt concentrations. With elevated salinity levels, significant reductions in growth parameters (dry shoot weight, fresh shoot weight, shoot length, root length, and root number) were observed. Also, significant difference in germination percentage was observed at 150 mM NaCl in both cultivars when compared with control treatment (90% germination percentage in Napoli and 71% in Jordan cultivar). Growth rate, tolerant index, and relative water content (RWC) declined as salinity increased. The 150 mM NaCl salinity treatment significantly reduced the shoot chlorophyll and protein content, but increased carbohydrate content. Lesser impairment by the gradual exposure of seedling to salinity provides an opportunity to study the acquirement of salt tolerance.
Źródło:: Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 6; 85-96
1644-0692
Pojawia się w:: Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:: Biblioteka Nauki

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