Ecology of diapausing copepodids of Cyclops kolensis Lill. in reservoirs of the Upper Volga

Hydrobiologia ◽  
1996 ◽  
Vol 320 (1-3) ◽  
pp. 235-241 ◽  
Author(s):  
Irina C. Rivier
Keyword(s):  
Upper Volga ◽  
Cyclops Kolensis

USE OF AGRO-RESOURCE POTENTIAL OF GRAY FOREST SOILS OF UPPER VOLGA REGION

2020 ◽  
Keyword(s):  
Forest Soils ◽  
Perennial Grasses ◽  
Organic Fertilizers ◽  
Volga Region ◽  
Winter Rye ◽  
Resource Potential ◽  
Field Crops ◽  
Upper Volga ◽  
Gray Forest Soils ◽  
Winter Cereals

The results of long-term research on the influence of main indicators on their agro-resource potential are summarized on gray forest soils of the upper Volga region. For the conditions of the Vladimir Opolie, the probable yield of biomass and the main products of field crops were calculated at different coefficients ofphotosynthetic active radiation (FAR) use. Calculations of the main product yields are made taking into account the distribution of biomass to by-products and crop-root residues. For field crops of the studied crop rotations, the coefficients of precipitation utilization are estimated. They varied from 44 to 71%, depending on the crop rotation culture. On the slope of the southern exposure when cultivating winter cereals and perennial grasses, the main moisture losses were observed in the spring during snowmelt, when growing spring crops and potatoes, they were close in the autumn and spring periods. The sizes of moisture use by crops depending on the fertilizer systems for the creation of 1 C of grain units (g.u.) and from sub-arable layers are determined. In comparison with the liming background, the use of organic fertilizers reduced the water consumption coefficient from 9.6 to 8.5 mm/C g.u., their combination with a single dose of NPK - up to 7.3, and with a double dose - up to 6.8 mm / C g.u. Based on the amount of moisture used by crops, their possible yields are calculated. In spring crops, the amount of precipitation consumed (326-356 mm) corresponds to the use of 2.7-3% of the FAR and provides 54-60 C/ha of grain, in winter rye and wheat - about 4% of the FAR (yield 71-80 C/ha). In perennial grasses for 2 mowing, the moisture consumed is enough to use about 3% of the FAR., in potatoes -1.5%.

PRODUCTIVITY OF SPRING WHEAT DEPENDING ON GROWING CONDITIONS

2020 ◽  
Keyword(s):  
Growth Regulators ◽  
Economic Efficiency ◽  
Spring Wheat ◽  
Mineral Nutrition ◽  
Photosynthetic Activity ◽  
Volga Region ◽  
Mineral Fertilizers ◽  
Biological Products ◽  
Upper Volga ◽  
The Upper Volga Region

Spring wheat is the main grain crop. Stable production of high-quality wheat grain is the key to the country's food independence. Therefore, the study of the elements of growing spring wheat technology, aimed at increasing the productivity of crops, is important. The study of the interaction of plants and microorganisms depending on the level of mineral nutrition in crop planning is currently ofparticular relevance. The use of biological products, growth regulators improves the mineral nutrition of plants, increases productivity and its quality, and also provides savings in mineral fertilizers. In the upper Volga region, the main spring crops are wheat, barley and oats. To further increase them in the region, it is necessary to study the characteristics of the formation of yields and determine the most productive crops depending on the level of nutrition, biological products and growth regulators. The scientific article presents the results of the study of these drugs on the productivity of spring wheat. In field experiments, it was planned to get 30, 40 and 50 tons of grain per hectare. Fertilizers for the planned harvest were made taking into account the agrochemical properties of the soil. From biological products used Flavobacterin, which has a protective effect against diseases and improves product quality, from growth regulators used agrochemicals HUMATE + 7 (10 % liquid concentrate), which is characterized by high biological activity. The yield level was determined taking into account the average long-term moisture supply and qualitative assessment of arable land. The indicators of photosynthetic activity of crops, crop and its structure, quality characteristics of grain and economic efficiency of growing spring wheat in the upper Volga region are presented. As a result of researches the optimum level of mineral nutrition for wheat, the efficacy of agrochemical diazotroph and programming yields of spring wheat, determined the photosynthetic activity of crops and grain yield, calculated economic efficiency of the studied techniques and established the qualitative characteristics of the crop. The program for obtaining the planned wheat yields in the years of the experiments was completed by 68-91 %. Close to the planned the program was implemented using a biological product and growth regulator-74-91 %.

The Assessment of the Diffuse Pollution from Agricultural Territories in the Upper Volga Basin and the Development of Measures to Reduce It: Case Study of the Yakhroma River

2020 ◽  
Vol 47 (5) ◽  
pp. 709-720
Author(s):  
L. V. Kireycheva ◽  
E. A. Lentyaeva ◽  
A. D. Timoshkin ◽  
V. M. Yashin
Keyword(s):  
Diffuse Pollution ◽  
Volga Basin ◽  
Upper Volga

Structural and functional characteristics of the bacterioplankton of rivers flowing through a large city (Cherepovets, Upper Volga Region)

2016 ◽  
Vol 43 (10) ◽  
pp. 1350-1356 ◽  
Author(s):  
A. I. Kopylov ◽  
T. V. Ievleva ◽  
A. V. Romanenko ◽  
E. A. Zabotkina
Keyword(s):  
Large City ◽  
Volga Region ◽  
Functional Characteristics ◽  
Upper Volga

Productivity of binary herbage based on non-traditional forage crops in the Upper Volga region

2021 ◽  
Author(s):  
N. V. Shmeleva ◽  
Keyword(s):  
Species Composition ◽  
Sugar Content ◽  
Field Studies ◽  
Volga Region ◽  
Forage Crops ◽  
High Sugar ◽  
Upper Volga ◽  
High Sugar Content ◽  
The Upper Volga Region

The article presents the results of field studies aimed at expanding the species composition of herbs and the search for adaptive cereals with a high sugar content in the Upper Volga region in 2015-2020.

IMPACT OF AGRICULTURAL TECHNOLOGIES ON WINTER RYE PRODUCTIVITY IN THE UPPER VOLGA REGION

2021 ◽  
pp. 10-14
Author(s):  
Alina Eduardovna Loshchinina ◽  
Galina Vasilievna Vikhoreva ◽  
Svetlana Valerievna Shishkina
Keyword(s):  
Volga Region ◽  
Winter Rye ◽  
Agricultural Technologies ◽  
Upper Volga ◽  
The Upper Volga Region

Chromatin Diminution in Cyclops kolensis Lill. (Copepoda, Crustacea) as a Radical Way to Inactivate Redundant Genome in Somatic Cells

2018 ◽  
Vol 156 (3) ◽  
pp. 165-172 ◽  
Author(s):  
Andrey K. Grishanin ◽  
Maxim V. Zagoskin
Keyword(s):  
Chromosome Number ◽  
Repetitive Sequences ◽  
Early Embryogenesis ◽  
Chromosome Size ◽  
Chromatin Diminution ◽  
Elimination Process ◽  
Dna Elimination ◽  
Molecular Studies ◽  
Cyclops Kolensis

Chromatin diminution (CD) is a phenomenon of programmed DNA elimination which takes place in early embryogenesis in some eukaryotes. The mechanism and biological role of CD remain largely unknown. During CD in the freshwater copepod Cyclops kolensis, the genome of cells of the somatic lineage is reorganized and reduced in size by more than 90% without affecting the genome of germline cells. Although the diploid chromosome number is unchanged, chromosome size is dramatically reduced by CD. The eliminated DNA consists primarily of repetitive sequences and localizes within granules during the elimination process. In this review, we provide an overview of CD in C. kolensis including both cytological and molecular studies.

Viruses in bottom sediments in a eutrophic reservoir (Ivankovo Reservoir, Upper Volga)

2015 ◽  
Vol 8 (3) ◽  
pp. 236-241 ◽  
Author(s):  
A. I. Kopylov ◽  
E. A. Zabotkina ◽  
A. V. Romanenko
Keyword(s):  
Bottom Sediments ◽  
Eutrophic Reservoir ◽  
Upper Volga ◽  
Ivankovo Reservoir
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