scholarly journals Typological structure and age composition of beach stands in the mountainous Crimea

2021 ◽  
pp. 26-37
Author(s):  
Y. V. Plugatar' ◽  
V. P. Koba ◽  
V. V. Papelbu ◽  
O. L. Muntyan
Keyword(s):  
Weather Conditions ◽  
Landsat 8 ◽  
Beech Forests ◽  
Age Composition ◽  
Adult Trees ◽  
Cyclical Process ◽  
Growing Conditions ◽  
Typological Structure ◽  
Young Growth ◽  
Mountainous Crimea

The features of the typological structure, age composition and territorial distribution of beech stands in the Mountainous Crimea were studied. It is shown that nowadays beech forests grow in the range of altitudes from 400-500 to 1300-1400 m above sea level on an area of 34.9 thousand hectares, which is 13.4% of the forested territory of the peninsula. The age structure of beech stands is characterized by the cyclical process of renewal of indigenous stands, which is determined by the implementation of favorable natural factors - the level of seed yield and weather conditions during the formation of seed renewal generation, the frequency of which is 40-50 years. Based on the analysis of the ecological spectrum of the species composition of the grass layer, it is established that the forest growing conditions in the beech stands in the central part of the Main Ridge of the Crimean Mountains should be characterized as fresh sudubravas and beech forests. The density of beech young growth in ecotopes in this area varies from 0.5 to 4 thousand pieces per 1 ha. In areas where the light regime improves, the young trees grow in the form of small bunches, often forming groups of young plants around the trunks of adult trees. Using satellite images of the Landsat 8 space sensing system, it was revealed that at present, in the central part of the beech forests of the Mountainous Crimea, significant areas are completely devoid of forest vegetation, or are covered with sparse woodlands, in the phytocenotic structure of which herbaceous plants predominate.

scholarly journals FOREST GROWING CONDITIONS OF PINUS PALLASIANA D. DON IN THE EASTERN PART OF THE SOUTHERN SLOPE OF THE MAIN RIDGE OF THE CRIMEAN MOUNTAINS

2021 ◽  
Vol 7 (73) (1) ◽  
pp. 64-74
Author(s):  
V. P. Koba ◽  
R. A. Nikiforov ◽  
V. V. Papelbu ◽  
M. L. Novitsky
Keyword(s):  
Weather Conditions ◽  
Satellite System ◽  
Research Area ◽  
Landsat 8 ◽  
Southern Slope ◽  
Crimean Mountains ◽  
Erosion Processes ◽  
Development Processes ◽  
Growing Conditions ◽  
The Stability

The objective of the research was to study the forest conditions and forest inventory characteristics of P. pallasiana in the eastern part of the southern slope of the Main ridge of the Crimean Mountains, the evaluation of its growth in connection with high-rise zoning and dynamics of soil properties. The studies were carried out using the methods of laying hypsometric profiles. Soil characteristics were studied in soil sections in five layers with an interval of 10 cm. The ecotopic grid of the Mountainous Crimea was used for the typological classification of phytocenoses. The features of the territorial distribution of artificial coniferous stands in the study area were analyzed using the data of space sensing of Landsat 8 satellite system. As a result of the conducted studies, it was found that the forest crops of P. pallasiana in the eastern part of the southern macroslope of the Main Ridge of the Crimean Mountains in the lower belt are characterized by low taxation indicators. With an increase in the height of the growing area, their state and growth intensity improve. Dynamics of forests conditions in the study area is associated with increasing dryness of the climate, a decrease in precipitation, the number of which decreases in the direction from the central to the eastern part of the southern slopes of the Main ridge of the Crimean Mountains. The high-altitude zoning of soil fertility is revealed. In the ecotopes of the middle belt, there is a decrease in the content of humus in the upper layer of the soil, which is associated with increased erosion processes in the territory of anthropogenic degradation of forest vegetation. High seasonal variability and instability of precipitation over the years, especially in the summer growing season, the weather conditions of which largely determine the implementation of growth and development processes, reduce the stability of the structure and composition of plant communities, form a negative ecological background, which determines the deterioration of the life state of P. pallasiana forest cultures. In the research area edaphic characteristics of forest crop ecotopes of P. pallasiana in the lower and middle belt correspond to forest-growing conditions such as dry sudubrava, and in the upper belt – fresh sudubrava.

SENSITIVITY OF FORSYTHIA POLLEN TO THE FACTORS OF THE ENVIRONMENT OF THE MEGAPOLIS

2021 ◽  
pp. 56-74
Author(s):  
Matiashuk R. ◽  
Tkachenko I.
Keyword(s):  
Air Pollution ◽  
Ecological Status ◽  
Pollution Index ◽  
Weather Conditions ◽  
Botanical Garden ◽  
Control Value ◽  
Adverse Weather ◽  
Long Time ◽  
Growing Conditions ◽  
High Level

The sensitivity of the reproductive structures of Forsythiasuspensato the complex influence of undifferentiated environmental factors has been studied.The monitoring sites are located in 15 different park ecosystems in 6 administrative districts of Kyiv. Data from the Borys Sreznevsky Central Geophysical Observatory (air pollution index (API) and meteorological conditions for 2018-2020) were used to assess the conditions of the growthenvironment. The influence of a complex of ecologically important factors during the flowering offorsythia on the quality of the formedpollen is noted. Thus, growing plantsfor a long time in conditions with a low level of air pollution (APIup to 5.0) in abnormal weather conditions in 2020,40-50% less fertile grainswere formed. And forplants, which grow in areas with increasedlevel (API5.0-7.0) and high level (API7.0-14.0) of air pollution, the share of fertile grains in the pollen population decreased by 60-80%. In the closed bud,the pollen has higher resistance to a complex of exogenous growth factors. Forsythia plants, which are located in large parklands, lose less pollen quality in adverse weather conditions and affected byurbotechnogenic factors. F. suspensa is an acceptable indicator of the level of environmental pollution by the deviation of pollen fertility from the control value. In areas with high aerogenic load, for example, areas with large highways (Bus Station «Darnytsia»), as well as with a significant recreational load (HolosiivskyiPark, Recreation Park on the Olena Teliha Street) much smaller pollen is formed. Itis noted that the conditions of forsythia growth affect the quantitative indicators of the formed pollen not only in the flower but also in the closed bud, which confirms the chronic effect of the complex of ingredients of aerotechnogenic emissions on plants of this species. The coefficient of sterility of pollen (CS) was used to objectively compare the data of 2019 and 2020 on the condition of the generative organs of F. suspensa in the studied areas. The calculation of the CS confirmed that in the closedbud pollen has a higher resistance to exogenous factors. In areas with high and increased levels of air pollution,during budding and flowering of plants (March-May,) there is a much higher CS of pollen of F. suspensа. Significant parkland territoriesof the city (for example, HolosiivskyiPark, Botanical Garden named after O. V. Fomin) provide less stressful conditions for growth and development of plants, even with the "very high" level of air pollution (ISA above 14.0) observed in April 2020 on this territory.The study of the susceptibility of F. suspensаpollen to growing conditions will be continued, as the prospects of using this species for bioindication of ecological status and zoning of park ecosystems of Kyiv according to the gradient of anthropogenic impact have been revealed.Key words:forsythia, fertility, coefficient of sterility of pollen, bioindication. Проведене дослідження чутливості репродуктивних структур Forsythiasuspensaдо комплексного впливу недиференційованих факторів навколишнього середовища. Моніторингові ділянки розташовані в 15 різних паркових екосистемах 6 адміністративних районівКиєва. Для оцінки умов середовища вирощування рослин використані дані Центральної геофізичної обсерваторії імені Бориса Срезневського (індекс забруднення атмосферного повітря (ІЗА) та метеорологічні умови за 2018-2020 рр.). Відмічено вплив комплексу екологічно важливих факторів (за показниками відхилення від норми середньої місячної температури повітря та місячної кількості опадів у Києві) уперіод квітування форзиції на якість сформованого пилку. Так, за тривалої експозиції рослин в умовах з низьким рівнем забруднення повітря (ІЗА до 5,0) в аномальних погодних умовах 2020 р. сформувалось на 40-50% менше фертильних зерен. А у форзиції, яка росте на територіях з підвищеним (ІЗА 5,0-7,0) та високим (ІЗА 7,0-14,0) рівнями забруднення частка фертильних зерен в популяції пилку зменшилась на 60-80%. У закритому бутоні пилок має вищу стійкість до комплексу екзогенних факторів середовища зростання. Рослини форзиції, які розташовані у значних за площею паркових насадженнях, менше втрачають якість пилку за несприятливих погодних умов та дії урботехногенних чинників. За відхиленням показника фертильності пилку від контрольного значення F. suspensaє допустимим індикатором рівня забруднення середовища. На територіях з підвищеним аерогенним навантаженням, наприклад, ділянки з автотранспортними магістралями (Автостанція «Дарниця»), а також зі значним рекреаційним навантаженням (Голосіївський парк імені М. Рильського, Парк відпочинку по вул. Олени Теліги)формується значно дрібніший пилок. Відмічено, що умови росту позначаються на кількісних показниках сформованого пилку не лише в квітці, але й в закритому бутоні, що підтверджує хронічний вплив комплексу інгредієнтів аеротехногенних викидів нарослини цього виду. Для об’єктивного співставлення даних 2019 і 2020 рр. щодо стану генеративних органів F. suspensaна досліджених ділянках був використаний коефіцієнт стерильності (КС) пилку. Розрахунок КС підтвердив, що в закритому бутоні пилок має вищу стійкість до впливу екзогенних чинників. Вищий КС був у F. suspense, з ділянок, на яких в період бутонізації і квітування рослин (березень-травень) відмічений високий і підвищений рівень забруднення атмосфери. Значні за площею паркові насадження міста (наприклад, Голосіївський парк, Ботанічний сад ім.акад. О.В. Фоміна) забезпечують менш напружені умови росту і розвитку рослин навіть при відміченому в квітні 2020 р. «дуже високому» рівні забруднення повітря (ІЗА вище 14,0) на цих територіях. Дослідження чутливості пилку F. suspenseдо умов вирощування буде продовжене,оскільки виявлена перспективність використання цього виду для біоіндикації екологічного стану та зонування паркових екосистем Києва за градієнтом антропогенного впливу.Ключові слова: форзиція, фертильність, індекс стерильності, біоіндикація.

scholarly journals Ontogeny of beech seedlings in the first vegetation period in stand conditions

2002 ◽  
pp. 81-91 ◽  
Author(s):  
Martin Bobinac
Keyword(s):  
Growth Period ◽  
Weather Conditions ◽  
Vegetation Period ◽  
Biological Properties ◽  
Beech Forests ◽  
Vegetation Growth ◽  
Closed Canopy ◽  
Stand Conditions ◽  
Root Collar ◽  
Intensive Growth

The ontogenetic properties of moesian beech seedlings were analysed in the first vegetation growth period at identical sites, but in different stand conditions based on the divergent values of unique and complex biological characteristics. The seedlings were formed on the deluvium at the site of montane beech forests (Fagetum moesiacae montanum typicum Jov. 1976) on deep eutric brown soil. The terrain is gently sloped, exposure east-southeast, altitude about 470 m The seedlings from the completely closed part of the stand are the phenotype of the sciomorphic structural form. Their above-ground shoots usually consist of: hypocotyl, cotyledons (or their scars), above-cotyledon internode-epicotyl, a weak (leafless, as a rule), sylleptically formed "above-epicotyl axis", two opposite, primary, leaves and vegetative buds, large terminal and undeveloped in the axyl cotyledons and primary leaves Compared to the conditions in the closed canopy, seedlings on the felling area differ in some biological properties and form a different phenotype In the different environment conditions, the greater significance of differences between identical biological properties is expressed according to the order of their origin. The most expressed differences occur in the development of the "above-epicotyl axis". In the juvenile stage of ontogeny, in the conditions of more illuminated felling area, Moesian beech can form shoots with shortened or incomplete cycle of morphogenesis and thus it is ontogenetically adapted to site and weather conditions More intensive growth of the "above-epicotyl axis" of the seedlings on the felling area conditioned the averagely higher seedlings at the end of the first vegetation growth period, more numerous assimilation apparatus, larger diameter root collar, larger diameter of hypocotyl and epicotyl parts. The range between average effects of growth in closed stands and in felling area points to the development potentials of beech depending on the factors of ecological nature, which can be controlled, to some extent, by silvicultural measures.

scholarly journals The effect of growing conditions and pollination mode on the Lonicera caerulea berry mass

2021 ◽  
Vol 38 ◽  
pp. 00018
Author(s):  
Irina G. Boyarskikh
Keyword(s):  
Related Species ◽  
Weather Conditions ◽  
Closely Related Species ◽  
Lonicera Caerulea ◽  
Fruit Setting ◽  
Growing Conditions ◽  
Pollination Mode ◽  
Blue Honeysuckle

The berry mass of the blue honeysuckle plants of different environmental and geographical provenance was shown to be affected by the weather conditions at the time of the fruit setting and ripening. Pollination by defective pollen and by the pollen of closely-related species resulted in the decreased berry mass.

scholarly journals Sugar accumulation in winter wheat crops depending on the sowing dates

2019 ◽  
Vol 49 (2) ◽  
pp. 27-33
Author(s):  
S. I. Anosov ◽  
A. S. Surnachev ◽  
K. K. Musinov
Keyword(s):  
Winter Wheat ◽  
Coefficient Of Variation ◽  
Sugar Content ◽  
Weather Conditions ◽  
Sugar Accumulation ◽  
Planting Dates ◽  
Air Temperatures ◽  
Sowing Dates ◽  
Soft Winter Wheat ◽  
Growing Conditions

The object of the research was to study the influence of sowing dates on sugar accumulation in different varieties of soft winter wheat. Less winterhardy variety of soft winter wheat Novosibirskaya 2 was compared with more winter-hardy ones Novosibirskaya 3, Novosibirskaya 40 and Krasnoobskaya ozimaya. The research was carried out in 2016-2018 inthe established experimental plot in the foreststeppe of Priobye, theObregion. The predecessor was bare fallow. The planting dates were August 20, September 1, September 10. Weather conditions of the autumn growing season, during which the accumulation of sugars occurs, differed significantly depending on the year of study and the sowing dates. The warmest conditions were in 2018, whereas the coolest – in 2017. The amount of accumulated sugars varied depending on the growing conditions and genotypic characteristics of varieties. The highest amount of sugars was accumulated by all varieties during the third term of planting, the lowest amount – during the second term. Lower air temperatures contributed to the increase in the amount of sugars, even when the duration of their accumulation period was shortened, which can be explained by a change in carbohydrate balance in crops when the accumulation of sugars is greater than their consumption for crop respiration. The genotype plays an important role in the carbohydrate metabolism of plants. In more winter-hardy varieties (Novosibirskaya 40, Novosibirskaya 3), the change in the amount of accumulated sugars in contrasting conditions ranged insignificantly (the coefficient of variation was 9.1 and 8.7%, respectively). At the same time, plants of the less winter-hardy variety of Novosibirskaya 2 showed a significantly greater variation in the sugar content under similar conditions (the coefficient of variation 24.7%). Cooler conditions of a later term of sowing contributed to the greatest amount of accumulated sugars. Varietal differences also determined changes in carbohydrate balance.

scholarly journals Grassland communities in the USA and expected trends associated with climate change

2016 ◽  
Vol 69 (2) ◽  
Author(s):  
David Paul Belesky ◽  
Dariusz Piotr Malinowski
Keyword(s):  
Net Primary Productivity ◽  
Weather Conditions ◽  
Anthropogenic Factors ◽  
Plant Resources ◽  
Global Trends ◽  
Temperature And Precipitation ◽  
The Usa ◽  
Grassland Communities ◽  
Growing Conditions

Grasslands, including managed grazinglands, represent one of the largest ecosystems on the planet. Managed grazinglands in particular tend to occupy marginal climatic and edaphic resource zones, thus exacerbating responses in net primary productivity relative to changes in system resources, including anthropogenic factors. Climate dynamism, as evident from the fossil record, appears to be a putative feature of our planet. Recent global trends in temperature and precipitation patterns seem to differ from long-term patterns and have been associated with human activities linked with increased greenhouse gas emissions; specifically CO<span><sub>2</sub></span>. Thus grasslands, with their diverse floristic components, and interaction with and dependence upon herbivores, have a remarkable ability to persist and sustain productivity in response to changing resource conditions. This resistance and resilience to change, including uncertain long-term weather conditions, establishes managed grasslands as an important means of protecting food security. We review responses of grassland communities across regions of the USA and consider the responses in productivity and system function with respect to climatic variation. Research is needed to identify plant resources and management technologies that strengthen our ability to capitalize upon physiological and anatomical features prevalent in grassland communities associated with varying growing conditions.

scholarly journals Stress-resilient maize for climate-vulnerable ecologies in the Asian tropics

2020 ◽  
pp. 1264-1274
Author(s):  
P.H. Zaidi ◽  
Thanh Nguyen ◽  
Dang N. Ha ◽  
Suriphat Thaitad ◽  
Salahuddin Ahmed ◽  
...  
Keyword(s):  
Climate Change ◽  
Agricultural Research ◽  
Weather Conditions ◽  
Climatic Conditions ◽  
Yield Potential ◽  
Specific Situation ◽  
Environment Interaction ◽  
Maize Germplasm ◽  
Growing Conditions ◽  
Variable Weather

Most parts of the Asian tropics are hotspots of climate change effects and associated weather variabilities. One of the major challenges with climate change is the uncertainty and inter-annual variability in weather conditions as crops are frequently exposed to different weather extremes within the same season. Therefore, agricultural research must strive to develop new crop varieties with inbuilt resilience towards variable weather conditions rather than merely tolerance to individual stresses in a specific situation and/or at a specific crop stage. C4 crops are known for their wider adaptation to range of climatic conditions. However, recent climatic trends and associated variabilities seem to be challenging the threshold limit of wider adaptability of even C4 crops like maize. In collaboration with national programs and private sector partners in the region, CIMMYT-Asia maize program initiated research for development (R4D) projects largely focusing on saving achievable yields across range of variable environments by incorporating reasonable levels of tolerance/resistance to major abiotic and biotic stresses without compromising on grain yields under optimal growing conditions. By integrating novel breeding tools like - genomics, double haploid (DH) technology, precision phenotyping and reducing genotype × environment interaction effects, a new generation of maize germplasm with multiple stress tolerance that can grow well across variable weather conditions were developed. The new maize germplasm were targeted for stress-prone environments where maize is invariability exposed to a range of sub-optimal growing conditions, such as drought, heat, waterlogging and various virulent diseases. The overarching goal of the stress-resilient maize program has been to achieve yield potential with a downside risk reduction.

scholarly journals Evaluation and Use of Genetic Resources in Spring Malting Barley Breeding in Lithuania

2009 ◽  
Vol 63 (1-2) ◽  
pp. 57-62
Author(s):  
Algė Leistrumaitė ◽  
Vanda Paplauskienė ◽  
Audronė Mašauskienė
Keyword(s):  
Grain Yield ◽  
Genetic Resources ◽  
Agronomic Traits ◽  
Spring Barley ◽  
Weather Conditions ◽  
Malting Barley ◽  
Breeding Lines ◽  
Barley Breeding ◽  
Extract Yield ◽  
Growing Conditions

Evaluation and Use of Genetic Resources in Spring Malting Barley Breeding in Lithuania During the period 2004-2006, grain yield stability and malt quality characteristics of 47 spring barley varieties and 55 promising breeding lines from the collection of spring barley genetic resources were investigated at the Lithuanian Institute of Agriculture (LIA). The growing conditions in 2004 were fairly normal compared with the long-term mean, and the years 2005 and 2006 were rather dry. The varieties and breeding lines tested showed from medium to high variation of grain > 2.5 mm yield (CV 11.5-34.3%) and medium variation of grain yield (CV 4.39-13.33%). However, high temperatures and drought in June of 2006 caused a low grain > 2.5 mm yield (by on average 55.0-67.8%). Promising breeding lines were characterised as having higher grain yield and extract output per ha compared with barley varieties. However, the data showed that grain grading 2.5 mm should be improved for the breeding lines. Using the software STABLE we estimated the stability of malting barley quality traits in relation to weather conditions during the crop year, genotype properties for varieties and breeding lines, as well as the interactions of variety and weather conditions. The selection of lines promising in terms of grain yield, > 2.5 mm grain yield and extract yield, was based on their ability to realise the genetic potential in various growing conditions. The highest score in integral assessment of grain yield, grain > 2.5 mm yield and extract yield was identified for the varieties Tocada', Sebastian', Scarlett' and breeding lines: 7939-1, 7661-1, and 8080-4. The varieties and breeding lines that exhibited high grain stability, high grain quality and other agronomic traits were utilised in further breeding programmes.

scholarly journals Morphobiology and assessment of the introduction possibilities of Leonurus cardiaca L.

2021 ◽  
Vol 21 (2) ◽  
pp. 211-219
Author(s):  
Ekaterina V. Pikalova ◽  
◽  
Yulia F. Kukhlevskaya ◽  
Keyword(s):  
Medicinal Plants ◽  
Weather Conditions ◽  
Botanical Garden ◽  
Morphometric Parameters ◽  
Collection Site ◽  
Seed Morphometry ◽  
Leonurus Cardiaca ◽  
Viable Seeds ◽  
Growing Conditions ◽  
Very High

The data on the study of morphometric parameters of one of the most valuable medicinal plants – Leonurus cardiaca L., growing in the collection site of medicinal plants of the Botanical garden of the OSU are presented. The parameters of samples, obtained from the cities of Samara and Kazan were compared . All the studied plants have passed the full cycle of their development with the formation of viable seeds. It is established, that the studied species adapts well to new growing conditions, while the morphometric parameters vary within the middle – very high levels of variability. Analysis of seed morphometry showed that the maximum values of the length and width of the seed are typical for samples from Kazan, the weight of 1000 seeds varies from 7.3 g to 9.2 g, depending on the weather conditions of a particular year of research. The assessment of introduction resistance made it possible to classify the species as stable and promising for cultivation.

scholarly journals Seed yield and seed quality of subterranean clover (Trifolium subterraneum L.) in growing conditions of Finland

1990 ◽  
Vol 62 (3) ◽  
pp. 221-226
Author(s):  
E. Varis ◽  
U. Peltola ◽  
R. Kauppila
Keyword(s):  
Seed Yield ◽  
Seed Quality ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Weather Conditions ◽  
Considerable Proportion ◽  
Early Variety ◽  
Growing Conditions ◽  
The University

Seed yield and overwintering of seeds of 22 Australian subterranean clover varieties were investigated in 1986 and 1987 at the Viikki Experimental Farm of the University of Helsinki. The seed yield varied remarkbly according to the variety and weather conditions of the two summers. Some varieties, such as Seaton Park, Woogenellup and Karridale, and during the summer of 1987 also the early variety Dalkeith, produced lots of seed. Some late varieties, e.g. Treeton, Tallarook and Esperance, produced very few seeds or no seeds at all. A considerable proportion of the seeds degenerated during the wet autumn conditions, by the end of October. Many seeds showed embryo dormancy, but complete dormancy or hard seeds were found only exeptionally. In spring 1988, some seedlings which had developed from overwintered burrs were found. There seems to be little hope of finding self-seeding subterranean clovers suitable for Finnish growing conditions.

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