scholarly journals АБІОТИЧНІ ТА БІОТИЧНІ ЧИННИКИ ВПЛИВУ НА ЩІЛЬНІСТЬ ПОПУЛЯЦІЇ ВЕЛИКОЇ ЗЛАКОВОЇ ПОПЕЛИЦІ (SITOBION AVENAE F.) У ПРАВОБЕРЕЖНОМУ ЛІСОСТЕПУ УКРАЇНИ

World Science ◽  
2019 ◽  
Vol 1 (11(51)) ◽  
pp. 50-53
Author(s):  
Мостов'як С. М. ◽  
Медвідь В. С.
Keyword(s):  
Coccinella Septempunctata ◽  
Meteorological Conditions ◽  
Forest Steppe ◽  
Summer Drought ◽  
Biotic Factors ◽  
Active Feeding ◽  
Spring Temperatures ◽  
Main Factors ◽  
Abiotic And Biotic Factors ◽  
The Right

Species composition of aphids on winter wheat was determined in the right- bank Forest Steppe of Ukraine during 2017–2018. Interspecies population was formed on wheat. It consisted of three species: S. avenae, Sch. graminum and D. noxia. S. avenae dominated and the other two species were found in small numbers. The abundance of S. avenae was determined by abiotic and biotic factors. The main factors influencing the density of the phytophage population were the meteorological conditions in April, May and June. Low spring temperatures and summer drought have hampered the development and spread of the pest. The influence of the genotype on the abundance of S. avenae is proved. Aphidophages effectively reduced the number of aphids during their active feeding. Aphidophages effectively reduced the number of aphids during their active feeding. Four species of Coccinellidae were identified, of which only one was dominated (Coccinella septempunctata L.).

scholarly journals PRODUCTIVITY AND QUALITY OF POTATO TUBERS ON IRRIGATED SOILS DEPENDING ON AGROTECHNIC CULTIVATION WAYS IN THE FOREST-STEPPE OF THE MIDDLE VOLGA

2018 ◽  
Vol 12 (4) ◽  
pp. 95-99
Author(s):  
Петр Чекмарев ◽  
Petr Chekmarev ◽  
Константин Владимиров ◽  
Konstantin Vladimirov ◽  
Александр Кокров ◽  
...  
Keyword(s):  
Granulometric Composition ◽  
Forest Steppe ◽  
Biotic Factors ◽  
Potato Tubers ◽  
Middle Volga Region ◽  
Middle Volga ◽  
Abiotic And Biotic Factors ◽  
Selection Of ◽  
Irrigated Soils

In modern conditions, one of the priority directions of potato growing is the selection of new highly productive varieties, resistant to the action of abiotic and biotic factors. When potatoes are cultivated, the optimization of mineral nutrition and the depth of planting of seed tubers is an important factor for obtaining sustainable yields. The experiments were laid on gray forest medium loamy granulometric composition of the soil of the forest steppe of the middle Volga region. It was established that the highest yield - 52.50 tons per hectare was formed when fertilizer doses (manure 50 tons per hectare + N135-153P135-145K179-184) were calculated for 50 tons per hectare of tubers, when planting to a depth of 8-10 cm. On tte background fertilization in a dose of manure 50 tons per hectare + N120P120K140 when planting at the same depth yield was 49.50 tons per hectare. On the variant with a planting to a depth of 6-8 cm, the yield of tubers was to 2.89 and 2.92 tons per hectare lower.

scholarly journals Potato productivity depending on variety specialties under cultivating in the right-bank Forest-Steppe of Ukraine

2020 ◽  
pp. 120-127
Author(s):  
M. Ostrenko ◽  
L. Pravdyva ◽  
Yu. Fedoruk ◽  
M. Grabovskiy ◽  
S. Pravdyvyi
Keyword(s):  
Animal Feed ◽  
Climatic Conditions ◽  
Raw Material ◽  
Average Weight ◽  
Forest Steppe ◽  
Potato Varieties ◽  
Modern Agriculture ◽  
Abiotic And Biotic Factors ◽  
The Right ◽  
Mass Increase

In terms of geographical distribution and consumption, potatoes occupy one of the leading positions in the structure of food production in Ukraine. It is also used extensively as animal feed. The versatility of use in diff erent sectors of the economy with potatoes cannot be compared to any crop. Potato is of great importance as a raw material for the production of starch, sugar, molasses, alcohol, glucose and etc. A signifi cant reduction in the commodity production of food potatoe in farms is related to the solution a whole complex of important issues, in particular seed production, agro-technology of cultivation, application of highly eff ective pesticides, availability of agricultural machinery and material-technical support. The difficult ecological and energy situation in modern agriculture proves that it is possible to obtain high and stable yields of all crops only if there are varieties in production adapted to diff erent soil and climatic conditions. Variety is one of the important factors of yield stability and fi xed assets of agricultural production. A variety, as a genotype or a set of very close genotypes, exists in a specific environment and, moreover, interacts with it, encountering complex communication, intensity and time of manifestation, abiotic and biotic factors. At the same time, a connection is established between a variety and an environment that infl uences the formation and manifestation of morphological, economic and biological characters. The aim of the research was to study the growth, development and yield of early ripe potato varieties in the rightbank Forest-Steppe of Ukraine. The article presents the results of studies on the cultivation of early ripe varieties of potatoes. Namely, the germination and survival of potato plants was studied, which amounted to 89.5 and 87.3 % in the Skarbnytsa variety, 90.2 and 88.7 % in the Shchedryk variety, and 88.6 and 86.5 % in the Dnipryanka variety; the number of formed stems per plant is calculated, which is 3.3 in the Skarbnytsa variety, 3.6 in the Shchedryk variety and 2.7 in the Dniprianka variety. The dynamics of the mass increase and the fractional composition of potato tubers are shown. On average, during the research, the average weight of tubers from the bush was high for the Shchedryk variety and amounted to 616.2 g, somewhat less than those for the Skarbnytsa (484,5 g) and Dniprianka (397,8 g) varieties. It was established that the Shchedryk variety had the highest potato productivity in the experiment – 250.3 c/ha, in the Skarbnytsa and Dnipryanka varieties, the yield was 210.0 and 201.2 c/ha, respectively. Key words: potato, varieties, plant survival, tubers weight, productivity.

scholarly journals Introduction into culture of the Psathyrostachys juncea (Fisch.) Nevski

1970 ◽  
pp. 45-56
Author(s):  
V. V. Buhayov ◽  
V. D. Buhayov
Keyword(s):  
Crude Protein ◽  
Dry Matter ◽  
System Analysis ◽  
Climatic Conditions ◽  
Meteorological Conditions ◽  
Perennial Grasses ◽  
Forest Steppe ◽  
Psathyrostachys Juncea ◽  
Calculation Results ◽  
The Right

Purpose. To evaluate a promising selection sample of the Psathyrostachys juncea (Fisch.) Nevski for its adaptability to the agro-climatic conditions of the Right-Bank Forest-Steppe and on its basis to create a highly productive multipurpose variety. Methods. System analysis, field, laboratory, comparative calculation. Results. It has been established that Psathyrostachys juncea acquires optimal hay ripeness in the end of the first–at the beginning of the second decade of May, which is 12-13 days earlier in comparison with awnless bromegrass and crested wheat grass. The forage productivity of the green mass of the Psathyrostachys juncea for two mowings ranged from 3.31 kg/m2 in 2018 to 4.90 kg/m2 in 2017 and on average over the years of research was at the level of 4.15 kg/m2, or 41.5 tons/ha, while the yield of dry matter averaged 1.40 kg/m2. It is proved that the forage productivity of the Psathyrostachys juncea for the three years of use primarily depended on meteorological conditions during crop formation. The content of nutrients during the years of research was: crude protein – 14.84, fat – 2.36, fiber – 21.89 and ash – 7.46%, which meets the requirements of highly nutritious feed, especially for beef cattle farming. Conclusions. Psathyrostachys juncea (Fisch.) Nevski enters into the phase of mowing ripeness in conditions of the Right-Bank Forest-Steppe 12-13 days earlier in comparison with other studied perennial grasses. The dry matter yield averages 1.40 kg/m2 with a deviation over the years from 1.20 to 1.65 kg/m2. The value of forage productivity of this species is strongly influenced by meteorological conditions during crop formation. The content of nutrients over the years of the research was: crude protein –14.84, fat – 2.36, fiber – 21.89 and ash – 7.46%. According to the results of the research, the Askanijskyi cultivar of the Psathyrostachys juncea (Fisch.) Nevski variety was submitted for the qualification examination in the system of the state variety testing (application №19658001 dated 21.10.2019).

scholarly journals Cultured flora of the Dendrological Park “Askania Nova”: a current state and main factors of influence

2021 ◽  
pp. 40-45
Author(s):  
N.O. Havrylenko
Keyword(s):  
Rare Plants ◽  
Biotic Factors ◽  
Ecological Resistance ◽  
Resistant Species ◽  
Current State ◽  
Plant Life ◽  
Factors Of Influence ◽  
Main Factors ◽  
Abiotic And Biotic Factors ◽  
A Current

The paper describes the composition of introduced species that form the collection fund of the Dendrological Park «Askania Nova», groups of arboreal plants are identified in connection with their ecological resistance. Information about the influence of abiotic and biotic factors on plant life is given, pest-resistant species are proposed for use. The tendencies of transformation of phytocenotic structure of the old park' s stands are noted. The directions of work on preservation of collection plantations and rare plants of different protection levels are described.

Researches on Slope Treatment Technologies under Complicated Geological Conditions in High Temperature and Rainy Regions

2014 ◽  
Vol 580-583 ◽  
pp. 940-946
Author(s):  
Rong Xiang Shan ◽  
Hai Ping Li
Keyword(s):  
Meteorological Conditions ◽  
Key Factors ◽  
Geographical Environment ◽  
Geological Conditions ◽  
Treatment Technologies ◽  
The Common ◽  
Main Factors ◽  
Slope Treatment ◽  
The Right ◽  
External Incentives

The appearance and development of deformation and loss of stability in the slope of cut is closely related with such interior causes as the qualities of layer rocks. Some external incentives like meteorological conditions, hydrology and process of construction are the main factors leading to the deformation of slope and its development. Three problems of deformation of slope, which is one of the common geographical hazards. The thesis, making an analysis of the geographical environment, the process of deformation and mechanism of destruction on slope of the right cut in Guangle Road K142+320~K142+740, reveals the key factors of deformation and damages of slope and proposes a reasonable realignment methods about slopes, which has achieved a good engineering effect and set a good example for the other similar slopes to be strengthened and improved.

Effects of abiotic and biotic factors on Vibrio harveyi ATCC 14126T survival dynamics in seawater microcosms

2019 ◽  
Vol 83 (2) ◽  
pp. 109-118 ◽  
Author(s):  
M Orruño ◽  
C Parada ◽  
E Ogayar ◽  
VR Kaberdin ◽  
I Arana
Keyword(s):  
Vibrio Harveyi ◽  
Biotic Factors ◽  
Abiotic And Biotic Factors

Influence of meteorological factors on potato yield in the conditions of the Right-Bank Forest-steppe

2018 ◽  
Vol 1 (94) ◽  
pp. 55-61
Author(s):  
R.O. Myalkovsky
Keyword(s):  
Meteorological Factors ◽  
Weather Conditions ◽  
Climatic Conditions ◽  
Potato Yield ◽  
High Yield ◽  
Forest Steppe ◽  
Potato Tubers ◽  
Middle Aged ◽  
Lower Yield ◽  
The Right

Goal. The purpose of the research was to determine the influence of meteorological factors on potato yield in the conditions of the Right Bank Forest-steppe of Ukraine. Methods.Field, analytical and statistical. Results.It was established that among the mid-range varieties Divo stands out with a yield of 42.3 t/ha, Malin white – 39.8 t/ha, and Legend – 37.1 t/ ha. The most favourable weather and climatic conditions for the production of potato tubers were for the Divo 2011 variety with a yield of 45.9 t/ha and 2013 – 45.1 t/ha. For the Legenda variety 2016, the yield of potato tubers is 40.6 t/ha and 2017 – 43.2 t/ha. Malin White 2013 is 41.4 t/ha and 2017 42.1 t/ha. The average varieties of potatoes showed a slightly lower yield on average over the years of research. However, among the varieties is allocated Nadiyna – 40.3 t/ha, Slovyanka – 37.2 t/ ha and Vera 33.8 t/ha. Among the years, the most high-yielding for the Vera variety was 2016 with a yield of 36.6 t/ha and 2017 year – 37.8 t/ha. Varieties Slovyanka and Nadiyna 2011 and 2012 with yields of 42.6 and 44.3 t/ha and 46.5 and 45.3 t/ha, respectively. Characterizing the yield of potato tubers of medium-late varieties over the years of research, there was a decrease in this indicator compared with medium-early and middle-aged varieties. However, the high yield of the varieties of Dar is allocated – 40.0 t/ha, Alladin – 33.6 t/ha and Oxamit 31.3 t/ha. Among the years, the most favourable ones were: for Oxamit and Alladin – 2011 – 33.5 and 36.5 t/ha, and 2017 – 34.1 and 36.4 t/ha, respectively. Favourable years for harvesting varieties were 2011 and 2012 with yields of 45.7 and 45.8 t/ha. Thus, the highest yield of potato tubers on average over the years of studies of medium-early varieties of 41.2-43.3 t / ha were provided by weather conditions of 2011 and 2017 years, medium-ripe varieties 41.0-41.1 - 2012 and 2011, medium- late 37,6-38,5 t / ha - 2012 and 2011, respectively.

scholarly journals Effects of Dysbiosis and Dietary Manipulation on the Digestive Microbiota of a Detritivorous Arthropod

2021 ◽  
Vol 9 (1) ◽  
pp. 148
Author(s):  
Marius Bredon ◽  
Elisabeth Depuydt ◽  
Lucas Brisson ◽  
Laurent Moulin ◽  
Ciriac Charles ◽  
...  
Keyword(s):  
Crucial Role ◽  
Structure And Function ◽  
Ecological Interactions ◽  
Dietary Manipulation ◽  
Biotic Factors ◽  
Abiotic And Biotic Factors ◽  
And Function ◽  
Multicellular Organisms ◽  
Over Time

The crucial role of microbes in the evolution, development, health, and ecological interactions of multicellular organisms is now widely recognized in the holobiont concept. However, the structure and stability of microbiota are highly dependent on abiotic and biotic factors, especially in the gut, which can be colonized by transient bacteria depending on the host’s diet. We studied these impacts by manipulating the digestive microbiota of the detritivore Armadillidium vulgare and analyzing the consequences on its structure and function. Hosts were exposed to initial starvation and then were fed diets that varied the different components of lignocellulose. A total of 72 digestive microbiota were analyzed according to the type of the diet (standard or enriched in cellulose, lignin, or hemicellulose) and the period following dysbiosis. The results showed that microbiota from the hepatopancreas were very stable and resilient, while the most diverse and labile over time were found in the hindgut. Dysbiosis and selective diets may have affected the host fitness by altering the structure of the microbiota and its predicted functions. Overall, these modifications can therefore have effects not only on the holobiont, but also on the “eco-holobiont” conceptualization of macroorganisms.

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