scholarly journals Syntaxonomy and ecological differentiation of the pioneer vegetation of Ukraine Classes: Isoëto-Nanojuncetea, Bidentetea

2021 ◽  
Vol 9 (3) ◽  
pp. 32-52
Author(s):  
Dmytro V. Dubyna ◽  
Tetiana P. Dziuba ◽  
Svitlana M. Iemelianova ◽  
Lyubov M. Felbaba-Klushyna
Keyword(s):  
Abiotic Factors ◽  
Steppe Zone ◽  
Water Bodies ◽  
Forest Steppe ◽  
Soil Humidity ◽  
Ecological Differentiation ◽  
Pioneer Vegetation ◽  
Phytosociological Relevés ◽  
And Cluster Analysis ◽  
High Level

Abstract The studies of the pioneer vegetation of freshwater shorelines of water bodies are of particular interest owing to the specific ecology of these habitats and the short cycle for their development in which periods of flooding and subsequent drainage alternate. Using the methods of phytosociological classification and cluster analysis based on the interpretation of 414 phytosociological relevés, the syntaxonomic structure of the pioneer vegetation of freshwater shorelines of the water bodies of Ukraine has been established that are represented by the phytosociological classes Isoëto-Nanojuncetea and Bidentetea. The class Isoëto-Nanojuncetea includes 8 associations that belong to 2 alliances and 1 order and the class Bidentetea includes 10 associations belonging to 2 alliances and 1 order. Phytocoenoses of both classes are more typical for the Polissia region and the forest-steppe zone of Ukraine, where there are favourable habitats with a flat relief, low degree of dissection and a high level of soil humidity. Using a DCA ordination analysis of associations their position in ecological space was determined. It was established that the main factors of ecological differentiation for Isoëto-Nanojuncetea habitats are soil humidity, soil aeration, nitrogen content, as well as temperature regime. Differentiation in the hyperspace of abiotic factors of the class Bidentetea occurs mainly along the gradients of soil humidity, salt regime and acidity. The ecological distribution of syntaxa of this class is also significantly influenced by the concentration of mineral nitrogen compounds in the soil.

scholarly journals The chemical composition of precipitation in Ukraine and its potential impact on the environment and water bodies

2019 ◽  
Vol 28 (1) ◽  
pp. 79-86 ◽  
Author(s):  
V. K. Khilchevskyi ◽  
S. M. Kurylo ◽  
N. P. Sherstyuk ◽  
M. R. Zabokrytska
Keyword(s):  
Chemical Composition ◽  
Atmospheric Precipitation ◽  
Steppe Zone ◽  
Meteorological Station ◽  
Water Bodies ◽  
Forest Steppe ◽  
High Concentration ◽  
Mixed Forests ◽  
The North ◽  
Potential Impact

This article provides characteristic of the chemical composition of atmospheric precipitation on the territory of Ukraine and its potential impact on the environment and water bodies. In Ukraine, the rainfall is 650 mm/year in the northwest of the country (mixed forests), up to 300 mm/year in the south (steppe zone), in the Ukrainian Carpathians - up to 1,600 mm/year. Acidity of atmospheric precipitation (pH) on the territory of Ukraine according to monitoring meteorological stations is 5.9-6.3. Minimum values of mineralization of atmospheric precipitation are observed in a zone of mixed forests in the north of the country. In particular, according to the weather station of Teteriv, the mineralization of atmospheric precipitation is 27.0 mg/l. In forest-steppe and steppe zones, this rate gradually increases to 35-45 mg/l, reaching a maximum in the steppe zone at the Askania-Nova meteorological station (82.4 mg/l). In the chemical composition of atmospheric precipitation, anion predominates sulfates, and among cations - magnesium. Anthropogenic component of the total mineralization of atmospheric precipitation, calculated for the first time on the territory of Ukraine (meteorological station Kobelyaki) by comparison with the regional natural background, is 69%. Concentration of sulfate ions (8-24 mg/l) in atmospheric precipitation on the territory of Ukraine shows a high level of pollution with sulfur, which corresponds to IV-V levels o environmental pollution. It is noted that with increasing concentrations of sulfates in atmospheric precipitation a tendency towards a decrease in the pH in the water of Svityaz Lake is projected. Current research shows that at high concentrations of sulfates in atmospheric precipitation, the risk of falling individual rains with low pH (so-called acid rains) increases. Waters of high concentration of organic matter and low mineralization of water are widely distributed on the territory of Ukraine (catchments of Polissya and the Carpathian region): up to 100 mg/l in the meadows and up to 30 mg/l in the flood period. Often, the pH of water in them is 6-6.5 and precipitation of acidic precipitation can significantly affect their hydroecological state. The obtained results on the influence of chemical composition of atmospheric precipitation on water objects have a diagnostic character. For more specific results, special synchronized studies of the chemical composition of the water of experimental water reservoirs with sampling ofatmospheric precipitation are required.

scholarly journals Yielding and quality indicators of new buckwheat varieties Kamianchanka

2019 ◽  
Vol 24 ◽  
pp. 49-52
Author(s):  
L. A. Vilchynska ◽  
A. S. Gorash
Keyword(s):  
Plant Height ◽  
Abiotic Factors ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Average Yield ◽  
New Variety ◽  
Standard Methods ◽  
Study Evaluation ◽  
State Test ◽  
State Registration

Aim. To compare the new variety of buckwheat Kamianchanka by individual indicators of suitability for distribution, difference, uniformity and stability with a conditional national variety-standard. Methods. The creation, study, evaluation, reproduction and transfer to the State trials of a new variety was carried out in accordance with the generally accepted methods of state trials. Results. The article presents the main identification indicators of the Kamianchanka buckwheat variety, created in the Podilskyi State Agrarian Engineering University. In terms of the suitability of the variety for distribution, difference, uniformity and stability, the Kamianchanka buckwheat variety exceeds the average yield of the varieties that have passed state registration in the previous five years in the Forest-Steppe Zone. The average yield of the new variety was higher than the conventional standard by 1.7 and 3.7 c / ha, or by 9.3 and 19.6%, respectively. Plant height varied from 73 to 156 cm and was on average 15 cm higher than the standard. The mass of 1000 seeds varied from 25.4-35 g and was higher in the Forest-steppe zone by 3.7-5 g (11.4-11.7%) compared with the conventional standard. A new variety of buckwheat Kamenchanka is sufficiently resistant to biotic and abiotic factors, suitable for cultivation in intensive technologies and mechanized harvesting. Сonclusions. A new variety of buckwheat Kamianchanka is listed in the Register of Plant Varieties of Ukraine for 2019. Recommended for growing farms of various forms of ownership. Keywords: buckwheat, yield, qualitative parameters, state test.

scholarly journals TRANSFORMATION OF THE HALOPHYTIC VEGETATION OF THE “SERDOBSKY SOLONETS” SERDOBSKY DISTRICT, PENZA REGION)

Ekosistemy ◽  
2021 ◽  
pp. 5-11
Author(s):  
L. A. Novikova ◽  
E. V. Mikhailova ◽  
V. M. Vasjukov ◽  
T. V. Gorbushina
Keyword(s):  
Plant Communities ◽  
Environmental Conditions ◽  
Vascular Plants ◽  
Anthropogenic Impact ◽  
Steppe Zone ◽  
Forest Steppe ◽  
South Eastern ◽  
Natural Monument ◽  
High Level

Halophytic vegetation is very rare in the forest-steppe zone. It was studied in the tract Serdobsky solonetsin the vicinity of Serdobsk (Serdobsky district, Penza region). The studies were conducted in the years 2009–2018, using the technique of geobotanical profiling. 80 trial areas were laid (35 in 2009 and 45 in 2008). Ecological and phytocenotic classification of plant communities is performed on the dominant principle. Comparison of two descriptions of vegetation with an interval of 10 years allows us to trace the transformation of halophytic vegetation after intensive anthropogenic impact (grazing and partial plowing) in different environmental conditions. The flora of Serdobsky solonets consists of 179 species of vascular plants, of which 13 species are included in the Red book of the Penza region (2013). The share of halophytic vegetation on the territory of Serdobsky solonetshas changed over 10 years: from 97.0 % to 63.8 %. Moreover, halophyte meadows occupied 67.0 % and halophyte steppes 30.0 % of the area in 2009. Now (2018) halophytic steppes make up 30.8 %, and halophytic meadows 33.0 %.The main stages of demutation of halophytic steppe and meadow vegetation were identified in various environmental conditions (meadows and steppes). The same stages of demutation were identified earlier for the South-Eastern Solonets (Neverskinsky district of the Penza region). However, a special stage of annual saline grasslands has been identified.This place requires protection due to the high level of floral and phytocenotic diversity. We offer to organize here a natural monument called “Serdobsky solonets”.

scholarly journals Оценка воздействия препаратов на основе Bacillus Subtilis и Trichoderma Viride на фитосанитарную ситуацию в посевах и продуктивность яровой пшеницы в северной лесостепи Западной Сибири

2020 ◽  
Author(s):  
С. Бурлакова ◽  
◽  
М. Егорычева ◽  
Keyword(s):  
Seed Treatment ◽  
Trichoderma Viride ◽  
Steppe Zone ◽  
Growth Conditions ◽  
Biological Properties ◽  
Growth Effect ◽  
Forest Steppe ◽  
Biochemical Processes ◽  
Chemical Treatments ◽  
High Level

The study was carried out in laboratory conditions and in the field experiment in the forest-steppe zone of Western Siberia. The protective effect of seed treatment with biofungicides Trichodermin and Sporobacterin in combination with spraying wheat crops with Fitosporin against root rot, the growth effect in the synergism of the biological properties of drugs was studied. It is shown that under the greening growth conditions of wheat, it is possible to replace the combination of chemical treatments with biological ones while maintaining a high level of productivity. The mechanism of influence of some combinations of drugs, revealing the peculiarities of biochemical processes in the cells of flag leaves of plants, on the forecast of productivity at the early stages of plant development has been revealed.

Distribution and morphological variation of Vipera berus nikolskii Vedmederja, Grubant et Rudaeva, 1986 in Western Ukraine, The Republic of Moldova and Romania

2010 ◽  
Vol 31 (1) ◽  
pp. 51-67 ◽  
Author(s):  
Vladimir Ţurcanu ◽  
Oleksandr Zinenko ◽  
Alexandru Strugariu
Keyword(s):  
Morphological Variation ◽  
Morphological Differentiation ◽  
Steppe Zone ◽  
Morphological Description ◽  
Forest Steppe ◽  
Meristic Characters ◽  
Vipera Berus ◽  
Republic Of Moldova ◽  
The Republic ◽  
High Level

AbstractMorphological variation of vipers of the Vipera berus complex in Eastern Romania, the Republic of Moldova and Western and Central Ukraine was studied using multivariate statistics. Discriminant analysis, based on ten meristic characters in 89.7% of cases (males) and in 92.0% cases (females), was able to separate reference samples of subspecies Vipera berus berus and Vipera berus nikolskii and was conducted to classify snakes from the studied territory. According to these results, V. b. nikolskii inhabits the broad-leaved forests in the forest-steppe zone in the Republic of Moldova, the hilly part of Eastern Romania and Central Ukraine. Specimens from a contact zone between V. b. berus and V. b. nikolskii have intermediate morphology and, thus, could represent the result of introgression. Populations of the Nikolsky's viper from the western part of its range combine high level of morphological differentiation from V. b. berus with the presence of non-black specimens and even include populations without melanistic specimens, previously thought not to occur in this taxon. A morphological description of the largest samples is given and determination of V. b. nikolskii is discussed.

APPLICATION OF NITROGEN FERTILIZERS BY FERTIGATION AT SEABUCKTHORN NURSERY

2021 ◽  
Vol 16 (3) ◽  
pp. 48-52
Author(s):  
Tatyana Nelyubova ◽  
Marina Ryzhova ◽  
Aleksandr Kanarsky
Keyword(s):  
Nitrogen Fertilizer ◽  
Nitrate Nitrogen ◽  
Steppe Zone ◽  
Nitrogen Fertilizers ◽  
Forest Steppe ◽  
Marketable Yield ◽  
One Year ◽  
High Level ◽  
Positive Effect

The effect of fertilizers application by the method of fertigation with drip irrigation during seabuckthorn growing in the nursery was estimated. The research has been carried out in the nursery field, in the forest-steppe zone of Altai Krai in 2019-2020. The soil on the experimental plot is gray-forest, reaction of the medium pH 5.8-5.9. The content of nitrate nitrogen was in the range of 7.8-9.8 mg/kg in the control variant; after fertilization, these values rose to 87.9 mg/kg. Nitrate nitrogen was determined by the ion-selective method. The soil at a high level is provided with mobile phosphorus 342-453 mg/kg and potassium 181-355 mg/kg - determined according to Chirikov. The research object – is one-year-old seabuckthorn trees of Altaiskaya cultivar. Urea was applied as nitrogen fertilizer in three rates of the active ingredient (40, 60, and 80 kg/ha). Double superphosphate (30 kg/ha) and potassium chloride (30 kg/ha) were used as the background. The soil moisture level was maintained at 70-80% of the LWC. The effectiveness of fertilizers was assessed by the marketable yield of two-year-old seedlings and their quality indicators. The measurements were carried out in the fall, after excavation. According to the values of the parameters of the aboveground part, the dose of nitrogen fertilizer of 60 kg/ha turned out to be the best option. At the same time, the seedlings had a height of 89.5 cm, the number of branches was 4.4 pcs., The diameter of the trunk was 8.4 cm, which is 15.4 cm, 0.5 pcs. and 1.3 mm above the control. The yield of seedlings of the first commercial grade in the experiment averaged 164 pieces. (82.8%), the maximum is marked on the N60P30K30 variant 190 pcs. (93.8%). Control without the use of fertilizers in all respects is significantly inferior to options with fertilizers. Thus, the use of nitrogen fertilizers has a positive effect on the quality of the seabuckthorn planting material. As a result, the utilization of nitrogen fertilizers has a positive effect on the quality of the seabuckthorn plant material, while higher concentrations become unprofitable compared to low ones due to high costs and insignificant differences in the quality of trees

scholarly journals Economic assessment of application of new reforestation technologies in conditions of climate change in the forest-steppe zone of Russia

2021 ◽  
Vol 875 (1) ◽  
pp. 012027
Author(s):  
S Morkovina ◽  
E Panyavina ◽  
I Podmolodina ◽  
A Burmistrov
Keyword(s):  
Climate Change ◽  
Root System ◽  
Economic Assessment ◽  
Steppe Zone ◽  
Innovative Technology ◽  
Forest Steppe ◽  
Forest Nurseries ◽  
High Level ◽  
Labor Consuming ◽  
Regions Of Russia

Abstract The development and application of new reforestation technologies remain relevant due to climate change. The main technology of forest sowing in Russia does not provide effective reforestation. Innovative technologies of reforestation based on seedlings with a closed root system make it possible to increase the livelihood of plants and accelerate reforestation processes. Using the method of determining costs, a comparative economic analysis of the technologies for growing oak seedlings with an open and closed root system in the forest-steppe regions of Russia was carried out. It was found that the technology of growing seedlings with a closed root system is less labor-consuming and provides a high level of income for investments. The innovative technology of growing seedlings with a closed root system in greenhouses is more competitive and its use allows to generate income from one hectare of area 50 times more than when growing seedlings in forest nurseries by increasing the number of seedling rotation. A comparative economic assessment of two oak seedling projects under forest-steppe conditions suggests the feasibility of moving to innovative reforestation technologies. In the current climate change conditions, a serious correction of approaches to reforestation in the forest-steppe zones of Russia is necessary.

scholarly journals Формування та симбіотична активність бульбочкових бактерій рослин гороху вусатого в Лісостепу України

2016 ◽  
pp. 89-93
Author(s):  
В. С. Пилипенко
Keyword(s):  
Positive Impact ◽  
Steppe Zone ◽  
Mineral Fertilizers ◽  
Forest Steppe ◽  
Nodule Bacteria ◽  
And Performance ◽  
Sowing Seed ◽  
Symbiotic Relation ◽  
High Level ◽  
Favorable Conditions

Наведені основні результати дослідження, проведеного в північній частині Правобережного Лісостепу України протягом 2014–2016 рр. на чорноземі типовому. Встановлено, що сортові особливості культури, передпосівна обробка насіння «Ризогуміном» та удобрення мали позитивний вплив на формування кількості і маси бульбочок у рослин гороху. Найбільш сприятливі умови для формування симбіотичного апарату створюються за поєднання посівної інокуляції насіння із внесенням мінеральних добрив у варіанті К1+N10P10 BBCH13-19 + N10P10 BBCH55-59+ N10P10 BBCH61-65. На фоні внесення мінеральних добрив N30P90K90 посилюється формування та продуктивність симбіотичного апарату рослин гороху. Вказаний рівень мінерального живлення є ефективним і за сівби насінням, яке не підлягало інокуляції. Внесення високих рівнів мінерального азоту негативно впливає на симбіотичний зв'язок між рослинами гороху і бульбочковими бактеріями. The basic results of research conducted in the northern part of Right-Bank of Forest-Steppe zone of Ukraine for 2014–2016 years on typical black earth are presented. We established that the varietal characteristics of culture, preplant treatment of seeds and fertilizer had a positive impact on the formation of the quantity and mass of nodules in pea plants. The most favorable conditions for the formation of symbiotic system are created by the combination of sowing seed inoculation with fertilizer in version K1 + +N10P10 BBCH13-19 + N10P10 BBCH55-59 + N10P10 BBCH61-65. Against the background of mineral fertilizers N30P90K90 the formation and performance of the device symbiotic pea plants amplified. The indicated level of mineral nutrition is effective and for the sowing seeds that are not subject to inoculation. The high level of mineral nitrogen negatively affects on the symbiotic relation between pea plants and nodule bacteria.

Sign in / Sign up

Export Citation Format

Share Document