scholarly journals Сезонні ритми розвитку Hyssopus officinalis за культивування в умовах Житомирського Полісся

2018 ◽  
Vol 8 (1) ◽  
pp. 335-341
Author(s):  
L. A. Kotyuk ◽  
O. V. Shvaika
Keyword(s):  
Growing Season ◽  
Climatic Conditions ◽  
Raw Material ◽  
First Year ◽  
Mass Flowering ◽  
Temperature And Precipitation ◽  
Development Cycle ◽  
Sum Of Effective Temperatures ◽  
Effective Temperatures ◽  
Phenological Phases

<p>The duration of phenological phases of 1-7-yeats-old <em>Hyssopus</em><em> officinalis</em> and its seasonal rhythms depending on the abiotic conditions of growth are established. It has been proved that hyssop belongs to late species by the terms of regrowth, the spring phase of which begins with the establishment of stable heat in April-May. The hyssop is attributed to the summer flowering plants, the flowering is the longest phase, and mass flowering is registered in July-August. Hyssop is a spring-summer-autumn-green plants, which begin the vegetation in spring, and in autumn they stay under the snow in green. Climatic conditions during the years of research were marked by temperature and precipitation fluctuations that affected the duration of the growing season and individual phenophases. First year seedlings of H. officinalis had the period of intensive growth and development from sowing to a period of rest was 159 days, whereas in Zhytomyr Polissya the sum of active temperatures was 2610 °С and sum of effective temperatures – 1180 °С. For 2-7-year-old hyssops the period from the spring regeneration to the death of the blooming plants and the formation of seeds lasted an average for 144 days (from 133 days in 2010 to 147 days in 2014). The range of temperatures required for the entire period was insignificant: active - from 2548.2 °C (2011) to 2696.3 °C (2012); effective - from 1152 °C (2009) to 1402.2 °C (2010). Compared with other phenological phases during the blooming period, plants require considerably more heat. The water scarcity did not affect significant on the duration of H. officinalis season rhythms. It is shown that to complete the development cycle of H. officinalis from the total amount of active temperatures was spent on average: for germination of seeds and spring regrowth – 5.9%, for stem formation phase – 13.5%, budding – 22.11%, blooming – 29.5%, fruiting – 16.5%, seeds maturation and pedicels dying – 12.6%; effective temperatures, respectively - 5.2%, 11.9%, 22%, 32.6%, 17.7%, 10.5%. The climatic conditions of Ukrainian Polissya allow to obtain hyssop plant raw material during one growing season, that indicates the adaptation of the species to the new conditions of growth.                </p>

scholarly journals Features of the phenological phases of introduced strawberry cultivars in the conditions of the Orel region

2021 ◽  
pp. 63-68
Author(s):  
M. I. Zubkova ◽  
S. D. Knyazev ◽  
I. E. Evtikhova
Keyword(s):  
Geographical Origin ◽  
Practical Importance ◽  
Climatic Conditions ◽  
Sum Of Effective Temperatures ◽  
Beginning Of Flowering ◽  
Effective Temperatures ◽  
Strawberry Cultivars ◽  
Phenological Phases

Relevance. The study of the timing and duration of individual phases of the development of strawberry cultivars of different ecological and geographical origin in these climatic conditions is of great practical importance. The purpose of the study was the determination of the timing of the main phenophases of introduced strawberry cultivars in the Orel region, the compliance of the phenorhythms of the studied cultivars with climatic conditions, as well as the ranking of the cultivars by the terms of flowering and maturation.Methods and materials. The article presents the results of phenological observations for the period 2016-2019. 34 strawberry cultivars of domestic and foreign selection were studied. The research was carried out at the VNIISPK site of primary variety study.Results. Based on long - term observations, on the time of entry into the flowering and fruiting phase, the cultivars were ranked into early, medium and late-maturing. The influence of effective temperatures on the onset of phenophases was analyzed. The sum of effective temperatures necessary for the beginning of flowering of strawberry cultivars of different maturation periods in the conditions of the Orel region was determined. For the onset of strawberry flowering, it takes from126.68 to 260.37°effective temperatures. Early cultivars need the sum of effective temperatures of 126.68-197.55°, cultivars of middle maturation need 146.31-225.44°, late cultivars - 159.93-260.37 depending on the year of study. Fruiting occurs at the sum of effective temperatures in early cultivars from 351.73°C to 465.43°C, in middle-maturing cultivars from 390.96 to 535.44°C, in late-maturing cultivars from 450°C to 649°C.

Pecularities of the seasonal development of the northern oak in the Bryansk region

10.12737/8444 ◽  
2015 ◽  
Vol 4 (4) ◽  
pp. 83-91
Author(s):  
Граборов ◽  
Aleksandr Graborov ◽  
Шошин ◽  
Vladimir Shoshin
Keyword(s):  
Quercus Robur ◽  
Growing Season ◽  
Seasonal Development ◽  
Close Relationship ◽  
Sum Of Effective Temperatures ◽  
English Oak ◽  
Effective Temperatures ◽  
The Relationship ◽  
Phenological Phases ◽  
Generative Organs

The article presents the data of phenological observations for the period of 2011-2013 for northern oak (Quercus borealis) and English oak (Quercus robur) in the training and experimental forestry of BSETA (Bryansk region). An attempt was made to identify the relationship between the amount of effective tem-peratures, the amount of rain and the onset of different phenological phases in northern oak and in Eng-lish oak. The close relationship (r = 0,794) was revealed between the length of the growing season in northern oak and the sum of effective temperatures of air above + 5ºC. Introduced oak, as well as local one, has complete cycle of seasonal development of vegetative and generative organs.

scholarly journals ECOLOGICAL-GEOGRAPHIC APPROACHES TO THE STUDY OF GENETIC DIVERSITY OF BARLEY AND OAT FROM THE VIR COLLECTION

2020 ◽  
Author(s):  
Igor Loskutov ◽  
Lubov Novikova ◽  
Olga Kovaleva ◽  
Nadezhda Ivanova ◽  
Elena Blinova ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Growing Season ◽  
Regression Coefficients ◽  
Cultivation Conditions ◽  
High Productivity ◽  
Sum Of Effective Temperatures ◽  
Economically Valuable Traits ◽  
Effective Temperatures ◽  
The Stability ◽  
Selection Of

Under conditions of climate change, the assessment of the stability of genotypes is of particular importance. To conduct directed selection of genotypes with a narrow or broad reaction rate, it is necessary to assess their stability already in the early stages of breeding. The aim of the study was to study the stability of breeding significant traits of oat and barley samples in contrasting ecological and geographical conditions. 25 oat samples and 25 barley samples were studied over 3 years under contrasting conditions in St. Petersburg and the Tambov region. Varieties are characterized by average values of economically valuable traits and genotype regression coefficients on the influence of the bi environment according to Eberhart and Russell. The most sensitive to a change in the ecological and geographical situation were the durations of the germination-heading, germination-harvest periods and grain yield. These characters varied to a greater extent depending on the cultivation conditions than on the genotype. According to regression coefficients for environmental conditions, significant differences in genotypes were only in yield. Contrasting groups of varieties were distinguished by regression coefficients on environmental conditions, genotypes with high productivity. The durations of germination-heading, germination-harvest, the plant height reacted to the change in the environment the same in different varieties. The duration of the growing season was determined by the sum of effective temperatures above 15C. The reduction of the growing season in both crops was 3 days with an increase in the sum of effective temperatures above 15C by 100C.

scholarly journals Different Wood Anatomical and Growth Responses in European Beech (Fagus sylvatica L.) at Three Forest Sites in Slovenia

2021 ◽  
Vol 12 ◽  
Author(s):  
Domen Arnič ◽  
Jožica Gričar ◽  
Jernej Jevšenak ◽  
Gregor Božič ◽  
Georg von Arx ◽  
...  
Keyword(s):  
Tree Ring ◽  
Climatic Factors ◽  
Ring Width ◽  
European Beech ◽  
Growing Season ◽  
Climatic Conditions ◽  
Maximum Temperature ◽  
Tree Ring Width ◽  
Vessel Area ◽  
Temperature And Precipitation

European beech (Fagus sylvatica L.) adapts to local growing conditions to enhance its performance. In response to variations in climatic conditions, beech trees adjust leaf phenology, cambial phenology, and wood formation patterns, which result in different tree-ring widths (TRWs) and wood anatomy. Chronologies of tree ring width and vessel features [i.e., mean vessel area (MVA), vessel density (VD), and relative conductive area (RCTA)] were produced for the 1960–2016 period for three sites that differ in climatic regimes and spring leaf phenology (two early- and one late-flushing populations). These data were used to investigate long-term relationships between climatic conditions and anatomical features of four quarters of tree-rings at annual and intra-annual scales. In addition, we investigated how TRW and vessel features adjust in response to extreme weather events (i.e., summer drought). We found significant differences in TRW, VD, and RCTA among the selected sites. Precipitation and maximum temperature before and during the growing season were the most important climatic factors affecting TRW and vessel characteristics. We confirmed differences in climate-growth relationships between the selected sites, late flushing beech population at Idrija showing the least pronounced response to climate. MVA was the only vessel trait that showed no relationship with TRW or other vessel features. The relationship between MVA and climatic factors evaluated at intra-annual scale indicated that vessel area in the first quarter of tree-ring were mainly influenced by climatic conditions in the previous growing season, while vessel area in the second to fourth quarters of tree ring width was mainly influenced by maximum temperature and precipitation in the current growing season. When comparing wet and dry years, beech from all sites showed a similar response, with reduced TRW and changes in intra-annual variation in vessel area. Our findings suggest that changes in temperature and precipitation regimes as predicted by most climate change scenarios will affect tree-ring increments and wood structure in beech, yet the response between sites or populations may differ.

scholarly journals ESTIMATION OF STABILITY OF SPRING BARLEY VARIETIES (Hordeum vulgare L.) IN MODERN CLIMATIC CONDITIONS OF THE ARKHANGELSK REGION

2019 ◽  
Vol 2019 (3) ◽  
pp. 35-47
Author(s):  
Ольга Батакова ◽  
Olga Batakova
Keyword(s):  
Spring Barley ◽  
High Stress ◽  
Stability Index ◽  
Climatic Conditions ◽  
Hordeum Vulgare L ◽  
Temperature And Precipitation ◽  
Sum Of Effective Temperatures ◽  
Resistance To Stress ◽  
Yield Formation

The long-term dynamics of the main meteorological indicators is analyzed, their compliance with the requirements of growth and development of promising varieties of barley is established. Over the past 19 years, there has been an upward trend in temperature and precipitation over all months during the growing season. The significant effect of the sum of effective temperatures and hydrothermal coefficient on the yield formation of the studied barley varieties was established. The data obtained indicate the need to create varieties that are more resistant to high temperatures. Under changing meteorological conditions, important indicators of varieties are their resistance to stress conditions of growth (U2 – U1) and genetic flexibility of the variety (U1 + U2)/2. In our experiments established that the high stress resistance have varieties of Dina and Kotlasskiy; the increased genetic flexibility was highest in the varieties Kotlasskiy and Tausen'. The lowest coefficient of variation (V) was observed in Kotlasskiy variety, the most high — variety Vard. The highest stability index and index of the level of stability of the yield of the variety were noted in the Kotlasskiy variety.

scholarly journals Some aspects of the study on the species Phacelia tanacetifolia Benth. as honey plant in the Republic of Moldova

2021 ◽  
Vol XII (2(21)) ◽  
Author(s):  
Natalia Cirlig ◽  
◽  
◽  
Keyword(s):  
Growing Season ◽  
Climatic Conditions ◽  
Germination Capacity ◽  
Republic Of Moldova ◽  
Development Cycle ◽  
The Subject ◽  
The Republic ◽  
Viable Seeds ◽  
Short Growing Season ◽  
Phacelia Tanacetifolia

Phacelia tanacetifolia Benth., which is a species with high potential as forage and honey plant, served as the subject of a new study. The species is characterized by short growing season, staggered and long flowering period (about 55 days depending on the climatic conditions and the date when it was sown). Under laboratory conditions, the germination capacity of the seeds is 84-92 %. The climatic conditions of the Republic of Moldova allow P. tanacetifolia plants to complete the whole ontogenetic development cycle – they bloom, bear fruit and produce viable seeds.

scholarly journals High resistance to climatic variability in a dominant tundra shrub species

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6967 ◽  
Author(s):  
Victoria T. González ◽  
Mikel Moriana-Armendariz ◽  
Snorre B. Hagen ◽  
Bente Lindgård ◽  
Rigmor Reiersen ◽  
...  
Keyword(s):  
Climate Change ◽  
High Resistance ◽  
Climatic Variability ◽  
Growing Season ◽  
Climatic Conditions ◽  
Vegetative Cover ◽  
Growth And Survival ◽  
Growing Season Length ◽  
Temperature And Precipitation ◽  
Precipitation Regimes

Climate change is modifying temperature and precipitation regimes across all seasons in northern ecosystems. Summer temperatures are higher, growing seasons extend into spring and fall and snow cover conditions are more variable during winter. The resistance of dominant tundra species to these season-specific changes, with each season potentially having contrasting effects on their growth and survival, can determine the future of tundra plant communities under climate change. In our study, we evaluated the effects of several spring/summer and winter climatic variables (i.e., summer temperature, growing season length, growing degree days, and number of winter freezing days) on the resistance of the dwarf shrub Empetrum nigrum. We measured over six years the ability of E. nigrum to keep a stable shoot growth, berry production, and vegetative cover in five E. nigrum dominated tundra heathlands, in a total of 144 plots covering a 200-km gradient from oceanic to continental climate. Overall, E. nigrum displayed high resistance to climatic variation along the gradient, with positive growth and reproductive output during all years and sites. Climatic conditions varied sharply among sites, especially during the winter months, finding that exposure to freezing temperatures during winter was correlated with reduced shoot length and berry production. These negative effects however, could be compensated if the following growing season was warm and long. Our study demonstrates that E. nigrum is a species resistant to fluctuating climatic conditions during the growing season and winter months in both oceanic and continental areas. Overall, E. nigrum appeared frost hardy and its resistance was determined by interactions among different season-specific climatic conditions with contrasting effects.

scholarly journals QUANTITATIVE CONTENT OF THE MAIN ACTIVE SUBSTANCES IN THE ROOTS OF THE NATURAL AND IN-TRODUCED PLANT SAPOSHNIKOVIA DIVARICATE (TURCZ.) SCHISCHK.

2021 ◽  
pp. 143-151
Author(s):  
Bayarma Munhoevna Urbagarova ◽  
Vasiliy Vladimirovich Taraskin ◽  
Tat'yana Valer'yevna Elisafenko ◽  
El'vira Eduardovna Shults ◽  
Elena Anatol'yevna Korolyuk ◽  
...  
Keyword(s):  
Raw Materials ◽  
Natural Populations ◽  
Total Content ◽  
Climatic Conditions ◽  
Raw Material ◽  
First Year ◽  
Quantitative Content ◽  
Two Samples ◽  
Saposhnikovia Divaricata ◽  
Active Substances

A HPLC-UV method was developed for the quantitative analysis of chromones in the roots of Saposhnikovia divaricata (Turcz.) Schischk. The optimal parameters of chromones extraction (two-fold ultrasonic extraction with a duration of 40 min with 50% ethyl alcohol at a raw material-extractant ratio of 1:10) were selected. The validation analysis showed that the proposed method is characterized by satisfactory metrological parameters. The method was used for the analysis of raw materials of wild, introduced and commercial samples of S. divaricata. In this work, for the first time in the roots of S. divaricata from natural populations of Buryatia, Trans-Baikal Territory, Mongolia and in the introduced samples, the HPLC-UV method was used to determine the quantitative content of the main active substances: prim-O-glucosylcimifugine (0.13–5.22 mg/g), cimifugine (0.01– 1.82 mg/g) and 4’-O-β-D-glucosyl-5-O-methylvisamminol (0.98–3.25 mg/g). The total content of chromones varies depending on the place of collection and the phase of vegetation. The content of chromones in two samples of roots from introduced S. divaricatae, collected in the first year of introduction in different climatic conditions, was established.

Intra-annual climatic signal in tree rings of Larix sp. based on the Vaganov-Shashkin model output

2021 ◽  
Author(s):  
Marina Fonti ◽  
Olga Churakova (Sidorova) ◽  
Ivan Tychkov
Keyword(s):  
Tree Ring ◽  
Tree Growth ◽  
Climatic Factors ◽  
Ring Width ◽  
Growing Season ◽  
Climatic Conditions ◽  
Limiting Factor ◽  
Precipitation Regime ◽  
The North ◽  
Temperature And Precipitation

&lt;p&gt;Air temperature increase and change in precipitation regime have a significant impact on northern forests leading to the ambiguous consequences due to the complex interaction between the ecosystem plant components and permafrost. One of the major interests in such circumstances is to understand how tree growth of the main forest species of the Siberian North will change under altering climatic conditions. In this work, we applied the process-based Vaganov-Shashkin model (VS - model) of tree growth in order to estimate the daily impact of climatic conditions on tree-ring width of larch trees in northeastern Yakutia (Larix cajanderi Mayr.) and eastern Taimyr (Larix gmelinii Rupr. (Rupr.) for the period 1956-2003, and to determine the extent to which the interaction of climatic factors (temperature and precipitation) is reflected in the tree-ring anatomical structure. Despite the location of the study sites in the harsh conditions of the north, and temperature as the main limiting factor, it was possible to identify a period during the growing season when tree growth was limited by lack of soil moisture. The application of the VS-model for the studied regions allowed establishing in which period of the growing season the water stress is most often manifest itself, and how phenological phases (beginning, cessation, and duration of larch growth) vary among the years.&lt;/p&gt;&lt;p&gt;The research was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-44-240001 and by the Russian Ministry of Science and Higher Education (projects FSRZ-2020-0010).&lt;/p&gt;

scholarly journals REPRODUCTIVE POTENTIAL OF POTATO ACCESSIONS FROM THE VIR COLLECTION IN MURMANSK PROVINCE

2019 ◽  
Vol 180 (3) ◽  
pp. 110-115
Author(s):  
S. N. Travina ◽  
Т. Е. Zhigadlo
Keyword(s):  
Potato Plant ◽  
Reproductive Potential ◽  
Growing Season ◽  
Potato Cultivars ◽  
The Arctic ◽  
Mass Flowering ◽  
The Third ◽  
The North ◽  
Self Pollination ◽  
Phenological Phases

Background. Knowledge of the reproductive potential in plants is of vital importance for potato cultivation in the Arctic environments.Materials and methods. From 2008 through 2017, 1594 potato cultivars with diverse maturation schedules from VIR’s collection were studied at the Polar Experiment Station of VIR. The material was evaluated according to the timing of their phenological phases (germination, budding, and flowering) and the possibility of their reproductive organs’ development.Results: With the same agricultural practice applied, cultivars of different maturation groups began to germinate and produce shoots at about the same time within the growing season, with a slight difference from 0.2 days (2010) to 3.3 days (2015). Further passing of phenological phases under the conditions of the Arctic depended on the mean daily air temperature and precipitation. The duration of the period from germination to flowering was largely affected by the temperature regime. The emergence of mass shoots was observed on average 18.5 ± 2.9 days after planting. The budding phase started 31.9 ± 4.7 to 43.0 ± 6.9 days after planting. The beginning of flowering occurred at the beginning of the third decade of July or 46.8 ± 4.9 to 57.5 ± 7.5 days after planting. The duration of the mass flowering of potato plants on average covered the time frame from the end of July to the middle of the third ten-day period of August. To move a potato plant from the budding phase to the flowering/mass flowering phase, a sum of effective July temperatures of 300°C is required. During the growing season, for all the years of the study, 97% of the varieties, as related to the total number of accessions, were able to set up buds; 85.7% entered the flowering stage; 63.3% moved to the stage of mass flowering; and 22.2% were able to set berries from self-pollination. According to the data of the long-term analysis of perennial agrometeorological data, the most favorable conditions for setting berries after potato self-pollination recurred every five years in the north. These conditions were formed under the sum of active air temperatures from 1170 to 1300°С (for June, July, and August), combined with insufficient provision of precipitation. Under the natural conditions in the north, the lack of moisture stimulates plants to enter the stages of flowering and fruit setting quicker and more intensively.Conclusion: The study made it possible to identify the optimal conditions for the fruit to be set by a potato plant in the north and also to acquire more data on the reproduction characteristics of potato cultivars.

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