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Wyszukujesz frazę "salinity" wg kryterium: Temat


Tytuł:
Soil Salinity Monitoring and Quantification Using Modern Techniques
Autorzy:
Al-Khuzaie, Marwah M.
Abdul Maulud, Khairul Nizam
Mohd Taib, Aizat
Tematy:
salinity
GIS
soil salinity indicator
regression model
Pokaż więcej
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:
https://bibliotekanauki.pl/articles/2202207.pdf  Link otwiera się w nowym oknie
Opis:
Along with sea-level rise, one of the most detrimental effects of climate change, is salinity leakage, which significantly affects agricultural activities throughout most of the world. This occurrence is becoming increasingly dangerous. The purpose of this study was to use Geographical Information Systems (GIS) to assess the current situation of agricultural lands in the province of Al-Diwaniyah, by employing GIS to document the salt-affected sites and arrive at the most important criteria affecting those lands as well as build an application model for suitability to clarify the affected sites and come up with paper and digital maps. To accomplish this, the study relied on the available data by extrapolating and analyzing remote sensing images using salt equations to analyze the Landsat 8 satellite images, after which these data were subjected to spatial statistical treatment in ArcGIS software. Moreover, 20 samples were taken from ground sampling points and subjected to laboratory analysis to compare and document the results. The research resulted in the creation of an up-to-date database for the locations of salt ratio growth or decrease in the province of Al-Diwaniyah, which can be relied on, starting from and expanding in the future. Land maps, both paper and digital, have been created and can be used and inferred. The findings demonstrated the model’s ability to steadily discriminate among all salinity groups while maintaining consistency with the ground truth data. Each of the four major salinity categories was highlighted. The best-performing indicators were used to build the MLR model, which was then used to anticipate soil salinity. The salt levels may be determined by the MLR combining NDVI and SI-5 with a high correlation value (R2 = 75.29%). Finally, it is shown that by combining spectral indicators with field measurements, it is possible to chart and forecast soil salinity on a large scale.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Rhizophagus irregularis Inoculation on Salt Tolerance in Cucurbita maxima Duch.
Autorzy:
Okon, Okon Godwin
Okon, Iniobong Edet
Tematy:
Arbuscular
Cucurbita maxima
Mycorrhizal
Rhizophagus irregularis
Salinity
Soil Salinity
Stress
Pokaż więcej
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:
https://bibliotekanauki.pl/articles/1112334.pdf  Link otwiera się w nowym oknie
Opis:
The influence of mycorrhizal fungi (Rhizophagus irregularis) on salt tolerance of Cucurbita maxima grown in saline soil was investigated in a pot experiment. The experiment was laid out in a completely randomized design, with treatments replicated thrice. Accordingly, soil salinity significantly (p=0.05) reduced total photosynthetic pigments from 58.06 to 38.06 mg/kg. Mineral contents, biomass yield, AMF colonization were also significantly (p=0.05) reduced. In contrast, mycorrhizal dependency was significantly (p=0.05) increased in saline soil plants (from 26.91% to 66.45%). Furthermore, inoculation with R. irregularis significantly (p=0.05) increased total photosynthetic pigments from 58.06 to 62.06 mg/kg; N from 4.88 to 5.47%; P 860.40 to 896.22 mg/kg; K 4430.00 to 4630.00 mg/kg; Mg 558.99 to 592.10 mg/kg and Ca 2810.00 to 3151.00 mg/kg; biomass yield; leaf dry weight from 0.06 to 0.14g; vine dry weight 3.68 to 5.09g; roots dry weight 0.32 to 0.74 and total dry weight 4.06 to 5.97g, R. irregularis colonization (from 33.77 to 58.44%) and mycorrhizal dependency in C. maxima was evident in both saline and non-saline soil treatments. The results of this work shows that R. irregularis can enhance the ability of C. maxima to resist salt stress - possibly through some morphological/ physiological changes, as well as improved vigour, probably via the extensive network of the mycorrhizal roots. This last is considered to be one of several mechanisms that magnify the salt tolerance of host plants through increased nutrient acquisition (N, P, K, Mg and Ca) and water uptake. Inoculation with appropriate AMF can, therefore, be used to increase the productivity of C. maxima in saline soils.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the relation between the dissolved 137cs activity and the simulated salinity in the lithuanian coastal waters
Autorzy:
Davuliene, L.
Valkünas, L.
Trinkünas, G.
Tematy:
Cs activity
salinity
Pokaż więcej
Wydawca:
Instytut Morski w Gdańsku
Powiązania:
https://bibliotekanauki.pl/articles/972868.pdf  Link otwiera się w nowym oknie
Opis:
In May 2000 the hydrodynamic model developed at the Federal Maritime and Hydrographic Agency in Hamburg. Germany was adopted to the Lithuanian part of the Baltic Sea. I nm grid is chosen. Comparison of measurements (1999.05.15) with the real time simulations of the particular period showed that in general, in the modelled area. the simulated salinity was higher than measured with most differences in the coastal zone. Average salinity distributions and the distribution of salinity standard deviations were analysed. The coastal area of 15 nm from the seashore, especially to the north of the Klaipeda Strait, is distinguished by the highest variance of the salinity. The relation between the salinity and the dissolved 137 Cs activity concentration was observed. However, 137 Cs activity bursts 1.5-2 times higher at the coast than the average, cannot be explained and are more likely to be related to the uplifted particulate matter.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the relation between the dissolved 137cs activity and the simulated salinity in the lithuanian coastal waters
Autorzy:
Davuliene, L.
Valkünas, L.
Trinkünas, G.
Tematy:
Cs activity
salinity
Pokaż więcej
Wydawca:
Instytut Morski w Gdańsku
Powiązania:
https://bibliotekanauki.pl/articles/1920636.pdf  Link otwiera się w nowym oknie
Opis:
In May 2000 the hydrodynamic model developed at the Federal Maritime and Hydrographic Agency in Hamburg. Germany was adopted to the Lithuanian part of the Baltic Sea. I nm grid is chosen. Comparison of measurements (1999.05.15) with the real time simulations of the particular period showed that in general, in the modelled area. the simulated salinity was higher than measured with most differences in the coastal zone. Average salinity distributions and the distribution of salinity standard deviations were analysed. The coastal area of 15 nm from the seashore, especially to the north of the Klaipeda Strait, is distinguished by the highest variance of the salinity. The relation between the salinity and the dissolved 137 Cs activity concentration was observed. However, 137 Cs activity bursts 1.5-2 times higher at the coast than the average, cannot be explained and are more likely to be related to the uplifted particulate matter.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of nano-silica and humic acid on physiological characteristics of Bermuda grass (Cynodon dactylon L.) under salinity stress
Autorzy:
Sharifiasl, R.
Kafi, M.
Saidi, M.
Kalatejari, S.
Tematy:
Iran
Bermuda grass
Cynodon dactylon
wild plant
water salinity
salinity condition
salinity stress
nanosilica
humic acid
physiological characteristics
chlorophyll
proline
Pokaż więcej
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Powiązania:
https://bibliotekanauki.pl/articles/12675903.pdf  Link otwiera się w nowym oknie
Opis:
This research was conducted to evaluate the effects of water salinity and nano-silica (NS) and humic acid (HA) on Bermuda grass. The study was carried out under greenhouse and exterior space conditions in a completely randomized design with factorial arrangements. Treatments included 4 water salinity levels (0, 5, 7 and 9 dS/m) and 4 level of NS (0, 1, 2 and 3 mm/l) as well as 4 level of HA (0, 50, 100 and 150 mg/l). Results indicated a decrease in chlorophyll content, and increase in proline, malondialdehyde (MDA), catalase (CAT), superoxide dismutase (SOD) and electrolyte leakage (EL) with increasing levels of salinity. The chlorophyll content in greenhouse and exterior space also increased with increasing levels of NS and HA, while proline in two environments, with increasing levels of NS and HA decreased. EL with increasing levels of NS fluctuated, but with increasing levels of HA, it decreased in two environments. With increasing levels of NS, CAT in both environments was eventually decreased after the oscillation, but there was no particular trend in HA levels. With increasing levels of NS and HA, MDA in the greenhouse decreased and in the exterior space – it increased. Finally, by increasing levels of NS and HA, SOD did not show any change in the greenhouse condition, but in the exterior space, the SOD was decreased.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biogenic substances in the waters of the gulf of Gdańsk in the IIIrd decade of july 1997, after passage of flood wave
Autorzy:
Bolałek, J.
Aftanas, B.
Lubomirski, K.
Karp, G.
Tematy:
salinity
Gulf of Gdańsk
Pokaż więcej
Wydawca:
Instytut Morski w Gdańsku
Powiązania:
https://bibliotekanauki.pl/articles/1920397.pdf  Link otwiera się w nowym oknie
Opis:
The paper discusses the distribution of salinity and of dissolved non-organic salts of nitrogen and phosphorus (nitrates, nitrites, ammonium, phos;hates) in the surface waters of the Gulf of Gdańsk after the flood wave passed in the IIIrd decade of July 1997. It was found, by comparing with data obtained in the past years, that the summer flood wave did not cause large changes in the amounts of the investigated biogenic substances in the waters of the region.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Drilling Waste Addition on the Salinity of Soils and Growth of Selected Grass Species
Autorzy:
Kujawska, Justyna
Wasąg, Henryk
Gawryluk, Adam
Tematy:
drill cuttings
reclamation
salinity
Pokaż więcej
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:
https://bibliotekanauki.pl/articles/123167.pdf  Link otwiera się w nowym oknie
Opis:
The soils that sustained damage from the mining industry are threatened with high salinity. The aim of the research involved assessing the impact of drilling wastes on the salinity of soils, and the influence of salinity on the germination and growth of various grass species. The research involved the energy, germination capacity and growth of four grass species: tall fescue Festuca arundinacea (cv. Odys), red fescue Festuca rubra (cv. Areta), perennial ryegrass Lolium perenne (cv. Gazon) and smooth meadow grass Poa pratensis (cv. Alicja) in the soils with various amount of drilling wastes addition and different salinity. The drilling waste addition in the amount of 5%, 10%, 15%, 20%, 30% (v/v) (pH 4.1, EC = 8.84 µS/cm) significantly increased the salinity of the prepared mixtures to the levels of >2.5 dS/m, determined as harmful for most plants. Studies indicated that 5%, 10% and 15% (v/v) drill cuttings addition does not inhibit the growth of the considered grasses, while at the 25% addition of drill cuttings, the length of seedlings and roots is halved in comparison to the control sample without drilling waste addition. The mixture with 30% drilling waste addition, characterized by the salinity of 18 dS/m, inhibits the growth of all considered plant species. The conducted discrimination analysis indicated that cv. Gazon and cv. Odys differ from the other considered grass species, exhibiting the highest resistance to salinity caused by drilling waste addition. In turn, cv. Alicja was characterized by the lowest tolerance to salinity.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some characteristics of fine structure and microstructure of Baltic Sea waters
Autorzy:
Golenko, N.
Tematy:
Baltic Sea
intrusions
salinity
Pokaż więcej
Wydawca:
Instytut Morski w Gdańsku
Powiązania:
https://bibliotekanauki.pl/articles/972856.pdf  Link otwiera się w nowym oknie
Opis:
It is generally agreed that fine structure and microstructure are usually beyond the resolution of numerical models. Nevertheless, corresponding processes have a considerable influence on water dynamics and exchanges in the Baltic Sea. Measurements of fine structure were carried out with the scanning CTD probe. Microstructure measurements were performed by towing a system with fast-response velocity, conductivity, and temperature sensors. Bottom turbulence was investigated with the Acoustic Doppler Velocimeter. Domains of high mixing and stining activity were revealed by means of high-resolution profiling on temperature and salinity transects. These domains were found near inhomogeneities of bottom relief such as the Słupsk Sill, the bottom elevation on eastern boundary of the Słupsk Furrow and in areas of ray concentration of quasi-inertial internal waves. Data on transects with manifestations of convection provide an evidence of the non-uniform distribution of turbulence in the upper layer. A bottom turbulence patch with duration of about 2 hours was registered over the slope of the Gotland Deep. The rate of turbulent energy dissipation is about ]105cm2/s3. In the area of Hamrarne and Słupsk Sill, horizontal scales of turbulent patches are between O(10m) and 0(100 m). All obtained data testify the high level of turbulent intermittency, so probability of detecting turbulent patches is high.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measured and predicted values of water temperature and salinity with special focus on the surface layer
Autorzy:
Kamińska, M.
Tematy:
salinity
POLRODEX
water temperature
Pokaż więcej
Wydawca:
Instytut Morski w Gdańsku
Powiązania:
https://bibliotekanauki.pl/articles/1920509.pdf  Link otwiera się w nowym oknie
Opis:
The Baltic is a stratified sea. The upper layer is under the influence of atmospheric and terrestial factors. The mechanisms of these external factors on the surficial and subsurface water layer are well recognised but the vertical exchange in the water body is still not sufficiently investigated. Field measurements at sea are time consuming and expensive. A model of the Baltic Sea distributed to and accessible by institutions investigating the Baltic Sea is advantageous because of easier exchange modelled data. The modelling, especially of the surface layer is important due to the fact that outside the coastal zone continuous measurements of physical parameters is difficult. The comparison between measured in situ and modelled data serves as a tool for the corrections to HIROMB resulting in better approximation of real phenomena occurring in the Baltic Sea. Temperature and salinity values obtained on board rlv Baltica during the POLRODEX'97 expetriment were compared with modelled values. The analysis showed significant differences between in situ measurements and obtained from the HIROMB model.
Dostawca treści:
Biblioteka Nauki
Artykuł

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