scholarly journals Phytocenotic and hydrochemical conditions of the new localities of Aldrovanda vesiculosa (Droseraceae) in Chernihiv Polissya

2020 ◽  
Vol 77 (6) ◽  
pp. 466-471
Author(s):  
O.V. Lukash ◽  
◽  
V.M. Popruha ◽  
O.Yu. Kupchyk ◽  
S.I. Strilets ◽  
...  
Keyword(s):  
Growth Conditions ◽  
Projective Cover ◽  
Organic Carbon Content ◽  
Short Term ◽  
The Czech Republic ◽  
Area 7 ◽  
Quantitative Characteristics ◽  
New Localities ◽  
Hydrochemical Conditions ◽  
Muddy Sediments

Aldrovanda vesiculosa is a rare stenotopic species threatened due to destruction of its biotopes. Since the species is protected nationally and internationally, monitoring of its populations is required. Information on growth conditions of A. vesiculosa in three new localities recorded in 2019 and 2020 in lentic (standing water) reservoirs with muddy sediments in the Chernihiv Polissya region is provided. All populations were found in communities of the alliance Utricularion vulgaris. In the first locality (Snovsk, an artificial pond with an area 0.6 ha), the population of A. vesiculosa (projective cover of 10%) occupied an area of 0.5 m × 1.5 m within the shoreline community of the Spirodelo-Aldrovandetum vesiculosae association. In the second locality (Lake Perekop, area 7 ha, in the floodplain of the Desna River) the species was found in an area of 1.5 m2, with projective cover of 25%, also within the Spirodelo-Aldrovandetum vesiculosae communities. In the third locality (Lake Nizhniy Bolhach, floodplain of the Dnipro River), this species was found in an area of 0.5 m2 within the communities of the Lemno-Utricularietum vulgaris association, with projective cover of 3%. The comparison of hydrochemical conditions of biotopes in the found localities and hydrochemical indicators of habitats of this species in the Czech Republic and Poland was carried out. In the first and second localities, the hydrochemical indices are optimal for A. vesiculosa. In Lake Nizhniy Bolhach, some quantitative characteristics of the water chemical composition are beyond the ecological optimum for this species, in particular, exceeded values of hydrogen index (pH 7.0), hardness (12.1 mmol/L), concentrations of calcium (163.039 mg/L) and magnesium ions (49.025 mg/L), while organic carbon content (1214 mg/L) is reduced. A short-term existence of A. vesiculosa in this locality is predicted.

scholarly journals Short-Term Decomposition and Nutrient-Supplying Ability of Sewage Sludge Digestate, Digestate Compost, and Vermicompost on Acidic Sandy and Calcareous Loamy Soils

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2249
Author(s):  
Nikolett Uzinger ◽  
Orsolya Szécsy ◽  
Nóra Szűcs-Vásárhelyi ◽  
István Padra ◽  
Dániel Benjámin Sándor ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Organic Carbon ◽  
Carbon Content ◽  
Plant Biomass ◽  
Test Plant ◽  
Organic Carbon Content ◽  
Short Term ◽  
Mineral N ◽  
Average Residual

Organic waste and the compost and vermicompost derived from it may have different agronomic values, but little work is available on this aspect of sewage sludge. A 75-day pot experiment with perennial ryegrass (Lolium perenne) as the test plant aimed to investigate the fertiliser value and organic matter replenishment capacity of digested sewage sludge (DS) and the compost (COM) and vermicompost (VC) made from it, applied in 1% and 3% doses on acidic sand and calcareous loam. The NPK content and availability, changes in organic carbon content and plant biomass, and the efficiency of the amendments as nitrogen fertilisers were investigated. The final average residual carbon content for DS, COM, and VC was 35 ± 34, 85 ± 46, and 55 ± 46%, respectively. The organic carbon mineralisation rate depended on the soil type. The additives induced significant N mineralisation in both soils: the average increment in mineral N content was 1.7 times the total added N on acidic sand and 4.2 times it on calcareous loam for the 1% dose. The agronomic efficiency of COM and VC as fertilisers was lower than that of DS. In the short term, DS proved to be the best fertiliser, while COM was the best for organic matter replenishment.

scholarly journals The Wagner’s law testing in the Visegrád Four countries

2020 ◽  
Vol 20 (4) ◽  
pp. 409-430
Author(s):  
Žaneta Tesařová
Keyword(s):  
Var Model ◽  
Capital Expenditures ◽  
Public Expenditures ◽  
Short Term ◽  
The Czech Republic ◽  
Wagner’S Law ◽  
Vec Model ◽  
Wagner's Law ◽  
Johansen Cointegration Test ◽  
The Relationship

AbstractThis research paper analyses the relationship between gross domestic product and public expenditures in nominal terms. The analysis is being done by using the standard Peacock-Wiseman specification of the Wagner’s law and provides the results for the Visegrád Four countries, i.e. the Czech Republic, Slovakia, Poland and Hungary. We aim to answer a question concerning the existence of a long and/or short-term relationship between the nominal GDP and nominal public expenditures, which consist of current and capital expenditures. To address this question, we employ the VAR model, the Johansen Cointegration test and the VEC model. We study a period between the first quarter of 1999 and the second quarter of 2019 and find out mixed results for the Visegrád Four countries.

scholarly journals Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem

2019 ◽  
Author(s):  
Hongying Yu ◽  
Zhenzhu Xu ◽  
Guangsheng Zhou ◽  
Yao Shou
Keyword(s):  
Soil Temperature ◽  
Soil Carbon ◽  
Field Experiments ◽  
Arid Ecosystems ◽  
Organic Carbon Content ◽  
Climatic Warming ◽  
Short Term ◽  
Desert Steppes ◽  
Carbon Release

Abstract. Climate change severely impacts grassland carbon cycling, especially in arid ecosystems, such as desert steppes. However, little is known about the responses of soil respiration (Rs) to different warming magnitudes and watering pulses in situ in desert steppes. To examine their effects on Rs, we conducted long-term moderate warming, short-term acute warming and watering field experiments in a desert grassland of Northern China. While experimental warming significantly reduced Rs by 32.5 % and 40.8 % under long-term and moderate and short-term and acute warming regimes, respectively, watering pulses stimulated it substantially. Warming did not change the exponential relationship between Rs and soil temperature, whereas the relationship of Rs with soil water content (SWC) was well fitted to the Gompertz function. The soil features were not significantly affected by either long-term or short-term warming regimes, respectively; however, soil organic carbon content tended to decrease with long-term climatic warming. This indicates that soil carbon release responses strongly depend on the duration and magnitude of climatic warming, which may be driven by SWC and soil temperature. The results of this study highlight the great dependence of soil carbon emission on warming regimes of different durations and the important role of precipitation pulse during growing season in assessing the terrestrial ecosystem carbon balance and cycle.

scholarly journals Analysis of Consumption on the Goods and Services Market in the Cybernetic Model of Selected Country

2019 ◽  
Vol 61 ◽  
pp. 01021
Author(s):  
Pavel Rousek
Keyword(s):  
Czech Republic ◽  
Theoretical Basis ◽  
Consumption Function ◽  
Short Term ◽  
Cybernetic Model ◽  
The Czech Republic ◽  
The Real ◽  
Goods And Services

The paper analyses the consumption on the goods and services market in the cybernetic model of Czechia. The theoretical basis is given by the consumption function in the short-term, the macroeconomic multiplier of the two-sector economy and the cybernetic model with the goods and services market. All the above-mentioned theory is applied to the real conditions of the selected country, which is the Czech Republic.

scholarly journals New finds of Cryphonectria parasitica and the first record of chestnut blight on red oak Quercus rubra L. in the Czech Republic

2012 ◽  
Vol 51 (No. 6) ◽  
pp. 256-258 ◽  
Author(s):  
P. Haltofová ◽  
L. Jankovský ◽  
D. Palovčíková
Keyword(s):  
Czech Republic ◽  
Castanea Sativa ◽  
First Record ◽  
Cryphonectria Parasitica ◽  
Chestnut Blight ◽  
Red Oak ◽  
The Czech Republic ◽  
Sweet Chestnut ◽  
New Localities ◽  
Endothia Parasitica

The causal agent of the chestnut blight, the fungus Cryphonectria parasitica (Murrill) M. E. Barr (syn. Endothia parasitica (Murrill) P. J. Anderson et H. W. Anderson), was found out at new localities in the Czech Republic. The chestnut blight was observed for the first time in the Czech Republic in 2002. Two new localities were discovered in southern Moravia in May and June 2004. The disease was identified both on the sweet chestnut (Castanea sativa Mill.) and on the red oak (Quercus rubraL.). Infected trees were treated according to the order of the State Phytosanitary Administration of the Czech Republic. 

Mathematical model of aerobic stabilization of old landfills

2012 ◽  
Vol 66 (6) ◽  
Author(s):  
Radoslaw Slezak ◽  
Liliana Krzystek ◽  
Stanisław Ledakowicz
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Organic Carbon ◽  
Aeration Rate ◽  
High Rate ◽  
Experimental Simulation ◽  
Co2 Production ◽  
Organic Carbon Content ◽  
Short Term ◽  
Aerobic Stabilization

AbstractA short-term aerobic stabilization of digested waste in the final methane phase was studied. The effect of aeration rate on the reduction of leachate parameters and on the rate of CO2 production and O2 assimilation was investigated. Experimental simulation of aerobic landfill stabilization was carried out using lysimeters. When testing the effect of aeration rate on the reduction of leachate indices (BOD5, COD, N-NH4+), it was reported that the most significant reduction was obtained at the highest rate of aeration and the smallest reduction of leachate indices was attained not at the lowest but at medium aeration rates. Both the rate of CO2 production and the O2 assimilation reached their highest values in the lysimeters aerated at a high rate of aeration. The proposed mathematical model which consists of a system of five differential equations describing CO2 production, O2 assimilation and the changes of organic carbon content in the leachate correspond well with the experimental data.

Response of labile organic carbon content in surface soil aggregates to short-term nitrogen addition in artificial Pinus tabulaeformis forests

2017 ◽  
Vol 37 (20) ◽  
Author(s):  
姚旭 YAO Xu ◽  
景航 JING Hang ◽  
梁楚涛 LIANG Chutao ◽  
谷利茶 GU Licha ◽  
王国梁 WANG Guoliang ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Surface Soil ◽  
Soil Aggregates ◽  
Nitrogen Addition ◽  
Pinus Tabulaeformis ◽  
Organic Carbon Content ◽  
Short Term ◽  
Labile Organic Carbon

Swiss policy turn may dampen Polish consumption

2015 ◽  
Keyword(s):  
Central Europe ◽  
Banking Sector ◽  
Balance Sheet ◽  
Capital Adequacy ◽  
Financial Risks ◽  
Short Term ◽  
The Czech Republic ◽  
Content Type ◽  
Credit Portfolio ◽  
The Impact

Subject The impact on Central Europe of the reverse in Swiss monetary policy. Significance The Swiss National Bank's (SNB) decision in January to scrap its exchange-rate peg against the euro raised concerns about a mortgage repayment crisis and lending practices in Central Europe (CE). Banks across the region are well capitalised on the whole, and better placed to absorb the impact of financial risks arising from the decision than those of countries further south-east, where deleveraging has continued. Banks in the Czech Republic and Hungary are the least exposed to foreign exchange (FX) risk; those in Poland are the most exposed. Impacts Poland's capital-adequacy ratios and strong credit portfolio will offset balance-sheet risks, but profits may fall in the short term. Hungary's banking sector is under heavy strain as a result of the government's FX debt relief programme. However, the Funding for Growth Scheme, and high forint and FX reserves, provide a liquidity buffer. Czech banks are CE's most profitable and liquid and will not be affected owing to tiny exposure to Swiss franc denominated loans.

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