The study concerns the results of the study of
coenopopulations of the following Fabaceae species:
Medicago falcata, Oxytropis candicans, and
Onobrychis arenaria under conditions of the Middle
Lena River. The study was conducted in Yakutsk
vicinities, 13 km north-east of the city. It is stated that
all the studied coenopopulations are normal. Rather
small values of substitution and recovery indices
evidence certain problems in self-maintaining
processes. The age structure analysis using two age
indices, “delta” and “omega”, allows to classify the
coenopopulations of Medicago falcata, Oxytropis
candicans and Onobrychis arenaria in phytocoenoses
of the Lena River valley as normal young populations.
They were prevailed by juvenile, immature, virginile,
and young reproductive plants
The article discusses the formation of the collection
that includes the most numerous genus Pelargonium
(L.Herit.) from the family Geraniaceae Juss, as well as
its importance, and the prospects for replenishing and
use. There is also analysis of the publications for the
recent years, clarifying approaches and principles in
classifying the representatives of this species. The
collection of Russian Research Institute of Floriculture
and Subtropical Crops is described, taking into account
new palynological and cytogenetic criteria in
pelargoniums section division. It is represented by
more than 120 species, cultivars, as well as
intravarietal and interspecific hybrids and is divided
into three branches (A, B, C2), three subgenus
(Pelargonium. Parvulipetala, Paucisignata) and five
sections (Pelargonium, Otidia, Peristera., Reniformia
Ciconium). Collection samples are included to the
breeding research, as sources of economic features
when creating highly-ornamental hybrids and
cultivars. The work also studies possible using of the
most adapted species, cultivars and hybrids in urban
landscaping on the Black Sea coast
Self-regulation of agricultural systems is based upon taking into account the interaction of their components released in variety of species and trophic relations; agricultural systems is diversified in towards a sustainable, productive and strategic development of the systems; one of the most promising areas of diversification of agricultural systems is considered to be an introduction to the practice of combining crops, known in agriculture for a long time, which shows us the nature. The most developed technology for creating combined crops is the practice of creating mixtures and the nature of the relationship between their different components
During cultivation in the glucose-mineral medium, Escherichia coli M-17, O75, № 14 and VL 613 and Salmonella enteritidis excrete amino acids, their composition and dynamics depend on the species and the strain identity. The total concentration of the ami-no acids for probiotic strains was higher than oppor-tunistic. Comparative analysis of the amino acids to their ability to influence the growth of bacteria, sug-gests that amino acids are carry out certain regulatory functions
We have assessed the effect of the new generations of fungicides on the vital activity of daphnia. The data of the chronic experiment allowed us to determine non-effective and threshold concentrations of the substances studied. The toxic effect of the xenobiotics is shown to be of different intensity. When entering water they may be dangerous, first of all, for the zooplankton that is the food base of young fish, and may have unfavorable effects on fish development
The purpose of examining the roadside agrocenosis in the Aksai district of the Rostov region was a comparative assessment of the ecological condition of ordinary black soil and agricultural products grown in the technologically transformed conditions. The evaluation of agro-forestry factor impact on refraining toxic substances from the techno-genesis road source was also of interest. The study was expected to determine the actual and potential content of copper, zinc and lead in the ordinary black earth, as well as to evaluate the accumulation level of the investigated elements in the winter wheat grain. The potential reserve of investigated elements in ordinary chernozem (or black soil) is several times higher than the potency of the current content. Distribution of the results of the actual and potential reserve determination demonstrated the transfer of gas-dust emissions beyond the forest belt where the production crops are grown. At the remoteness point of 10 meters away from the road beyond the forest belt minimal amounts of actual and potential element content were found. At a distance of 50 - 100 m there was found a significant excess content of copper, zinc and lead. Repeated studies conducted 20 years later, identified the lead content in winter wheat grain exceeding the MPC. The results obtained have demonstrated the lack of agro-forestry effect in refraining gas and dust emissions by the road forest belt
In FSBRI «North-Caucasus zonal scientific-research
institute of horticulture and viticulture» (Krasnodar)
there was carried out the comparative economicbiological
study of the average-height apple-tree
stock М9ЕМLA in comparison with initial weakgrowing
stock М9 in manifold, nursery and garden.
Manifold bushes of the clone M9ЕMLA is quite
worse in force than the stock М9 and were less
branchy. Output of standard per hectare of manifold
at the clone M9ЕMLA was on 35,5 thousand units
more, and а standard condition of cuttings - on 13,2
% higher, than at the stock М9. Cuttings of the clone
were less spiked and better rooted. In the first field of
nursery, the plants of the clone had a vertical growth
of the central conductor, slightly weaved and were
more suitable to inoculation. The output of standard
plants, in the variant with the use of clone M9ЕMLA
by the variety Champion, in average for 2006-2010
was on 3112 units/hа, and on the variety Prikubanskoye
– correspondently on 2470 units/hа higher
than grafted on the stock М9. The cost price of 1000
seedlings on the clone M9ЕMLA was on 1962 rubles
less than on the stock М9, and the standard of profitability
of seedling growing, on the contrary was on
14-19 % higher. In the garden the trees on the clone
M9ЕMLA were worse in growth of trees grafted on
М9: on volume of the crone on 0,4-0,6 m3
, in diameter
of the stem on 9-12 mm, in dependence on
the variety, independently on the fact that some trees
on clone were more weaker than grafted on the stock
М9, their productivity for 2011-2015 was higher as
from one tree as from the unit of area. The intensity
of fruiting expressed in yield in kilos from a tree on
the unit of volume of the top of a tree on the clone
M9ЕMLA was on 33-39% higher than at the trees on
the stock М9
The main contribution to the soil biological properties change in the combined pollution with lead and an alternating magnetic field makes lead pollution. Contribution of the interaction of factors of 20-30%. The contribution of the alternating field was
insignificant or unreliable. Black soil and brown forest soils are similar in degree of resistance to the combined pollution. Grey sands have less stability
Complex compost includes all elements of the periodic table and is valuable due to the complexity of its system. Among the elements forming a chemical composition of the complex compost we can identify two most important, which are distinguishing a specific character of the interaction with each other and defining the basic processes to ensure vegetation of living system - nitrogen and carbon. Nitrogen determines the rate of energy and connects with living forms of organic matter; it is included as the part of protein and is a major element in determining the productivity of ecosystems. At the cycle of carbon its organic forms and carbon dioxide take a part, presenting the main factors of the processes of respiration and photosynthesis
Toxicity complex compost arises during compiling of organomineral mixtures of various waste of life, agriculture and mineral industries. One of detoxification factors of complex compost is the ability of heavy metal cations to the formation insoluble compounds, which are fixed by clay materials and different disperse systems, and differ markedly by calcium content, acidity and humus soil-absorbing complex