EEEP 4/ 2021
H. Najdenski 3-4
I. MAN AND BIOSPHERE
G. Stoilov, N.Nikolov, D. Stoilov 5-15
II. ECOLOGICAL AND SUSTAINABLE AGRICULTURE
S. Marinova, E. Zlatareva, M. Banov, N. Katijotes 16-20
B. Malcheva 21-28
III. FOREST ECOLOGY AND BIOLOGY
S. Bogdanov 29-36
M. Georgieva, P. Glogov 37-42IV. RADIATION ECOLOGY
E. Geleva, D. Tonev, H. Protohristov 43-49
D. Dimitrov, A. Demerdjiev, V. Pavlova, M. Shehadi, G. Dimitrova, N. Goutev, D. Tonev 50-59
V. SPACE TECHNOLOGY AND ENVIRONMENTAL MONITORING
T. Ivanova 60-67
Prof. Svetla Marinova at the age of 70 68
VII. SCIENTIFIC FORUMS
Ecological Engineering and Environment Protection with Youth Scientific Session and MELiSSA Summer University (EEEP'2021)
30 Sept. - 3 Oct. 2021, Varna, Bulgaria 69-75
Keywords: electrical infrastructure, electrical power lines, securing, impacts on birds
CHARACTERISTICS OF INDUSTRIAL PRODUCT FROM “DEVNYA CEMENT” AD FOR REMEDIATION OF ACID SOILS
Svetla Marinova, Elena Zlatareva, Martin Banov, Nicholas Kathijotes
Abstract. Soil acidity is one of the main problems of soil chemistry, as the soil adsorbent is composed entirely of acids with insoluble anions, different in composition and strength, etc. acidoid. The issues of acidity and liming of soils were raised in Bulgaria more than 60-70 years ago. “Devnya Cement”AD produces the Restart product, as an integral part of the process in the installation of cement clinker in a dry way and contains a high amount of calcium oxide /lime material/. The aim of the study is to characterize and evaluate the industrial flow Restart including agrochemical, chemical and physico - chemical indicators. The product was found to have a high neutralizing ability. It is a fast-acting and effective ameliorant, has the necessary qualities and its effect as an ameliorant on acid soils can be studied.
Keywords: ameliorant, characteristics, neutralizing ability
Abstract: Urbogenic soils from the region of Kardzhali municipality with high concentrations of heavy metals – Pb, Cd, Cu and Zn were studied. The main share in the composition of total microflora is occupied by non-spore-forming bacteria and bacilli, which are most actively involved in the initial stages of self-cleaning of soils from heavy metals and the destruction of organic matter. Actinomycetes and micromycetes are most strongly suppressed by contamination with the studied trace elements. The incidence of pigmented microbes, as a protective mechanism against external chronic stress conditions, is highest in the most contaminated soils. No correlation was found between the content of heavy metals and the total microflora, which again confirms the adaptability of microbes to long-term soil contamination with heavy metals, as well as their self-cleaning capabilities.
Keywords: urbogenic soils, heavy metals, microorganisms
Abstract. In Bulgarian soil system and in the World Reference Base for Soil Resources (WRB), Humus-Carbonate soils (Rendzinas) are primitive soils (Leptosols) formed on calcareous rocks. The paper presents results from study on Rendzinas in the Western Rhodope Mountains. The soils are situated in the Middle forest vegetation zone (700 – 2000 m a. s. l.) of the Tracian forest vegetation area. The factors of soil formation and the soil properties have been analyzed. Soil fertility was determined on the base of soil depth, content of humus, total N, soil available water, pH, bulk density (Q), ratio C/N and soil texture. The bonitet of stands and the composition of tree species have been used as indicators of the soil silvicultural effect. Conformity between soil properties and vegetation development has been established.
Keywords: humus-carbonate soils, factors of soil formation, soil properties, vegetation development.
Mira L. Georgieva, Plamen Glogov
Abstract: Changes in the morphology of invasive alien species (IAS) can serve as an indicator of the dynamics of their populations and ecological conditions in their habitats. The subject of the present study is the one-year IAS Impatiens glandulifera Royle, whose morphology and phenotypic variability are still relatively poorly studied. In the period August-September, 2020 the morphological characteristics of the populations of I. glandulifera in 6 permanent sample plots (PSP) were studied. The following morphological features were measured in each PSP in a random sample of 30 mature individuals: Length of seed pod, Number of seeds per seed pod, Number of developed (fertile) seeds per seed pod, Number of undeveloped (sterile) seeds per seed pod, Weight of developed seeds, Average weight of one fertile seed, Stem height, Number of blooming flowers, Number of flower buds. The results of the analysis of variance show that the variation of all morphological features by sample plots (separate localities) is statistically significant. The “Fanny” cluster analysis classified the observations by sum of morphological features into three cluster groups and highlighted the height of the stem as a morphological feature that could serve as an indicator for monitoring studies of changes in the morphology of populations of I. glandulifera and with the characteristics of the habitat.
morphology, invasive alien species,
Elena Geleva, Dimitar Tonev, Hristo Protohristov
Abstract: The uranium content
of 41 mineral water samples from
different districts in
Bulgaria was determined. The
results show that the concentrations range from ˂ 3.0 µg/L
to 860 µg/L.
Due to differences in the geological structure of the aquifer, a large difference in values of the radioactive content was observed. The estimated total indicative dose (TID) ranged from 2.5 µSv/y to 706 µSv/y. Except one value, TID do not exceed the permissible limit of 100 µSv/year.
The obtained new results are used to assess the radiological status of the investigated waters. They will support timely and adequate measures to reduce the harmful impact of ionizing radiation on the population in cases of increased radioactivity.
Keywords: Mineral water,
uranium, total indicatice dose.
Dobromir T. Dimitrov, Anguel Demerdjiev, Velislava N. Pavlova, Mariam-Rima Shehadi, Galina D. Dimitrova, Nikolai Goutev, Dimitar Tonev
Abstract: The Institute for Nuclear Research and Nuclear Energy at the Bulgarian Academy of Sciences is working on the construction of a National Cyclotron Center. Various fields of science will be the subject of research interest, such as: radiobiology, nuclear physics, nuclear energy, as well as the production of radioisotopes and radiopharmaceuticals for the purposes of nuclear medicine. When creating a new accelerator complex, it is crucial to select the necessary team of qualified personnel. The publication shows that the activity of human resources is an important part of achieving the planned levels of organizational structure, with a clear hierarchy of management of the cyclotron center. A summary of the results obtained so far from the analysis of the radiation protection of the facility through Monte Carlo simulations is made.
resources, radiation protection.
One of the most important Bulgarian
achievements in the space research was the "Bulgaria-1300" program,
in 1981 in honor of the 1300th anniversary of the founding
country, including two research satellites.
The first satellite "Interkosmos-Bulgaria-1300"
was launched on 07.08.1981 into
nearly polar orbit with an altitude of about
900 km with a complex
of 11 Bulgarian scientific instruments for space plasma
measurement and studying
interactions, as well as the laser reflector for geodetic
second satellite "Meteor-Priroda" with scientific
instrumentation for remote sensing, developed with the
participation of Bulgarian
scientists, was launched on 10.07.1981 in
650 km sun-synchronous orbit. The scientific results from
the processed satellite information are world wide used and published up to now.
Keywords: Intercosmos program, "Bulgaria-1300" program,“Interkosmos-Bulgaria-1300” satellite, “Meteor-Priroda” satellite