The article presents the results of the evaluation of the spatial structure and condition of trees and shrubs in different types of park stands located in the park called “Yamka” in Petrozavodsk. Features of planning and spatial distribution of trees and shrubs have been identified. The species and number of plants in good, satisfactory and unsatisfactory states were determined. The conducted analysis of species distribution and the number of trees and shrubs in each category of state allows suggesting the activities for reconstruction of park stands
The article identifies the value of livestock in the economy of the Bryansk region; we have also given the spatial-temporal analysis state of the industry and identified the key trends in its development over the past 25 years. This work considers the geography of industries and production of major livestock products
The results of the research of the stationary experiment at "Kuban" educational farm of Kuban State Agricultural University have been submitted. We have traced the direction of change of humus status of black leached soil
The use of physical factors for preplant stimulation
of seeds increases vigor, germination and improves
the yield of agricultural products. One of the effective
ways to improve seed grain quality is to impact
on the seeds using physical factors, in particular, an
alternating electromagnetic field of industrial frequency
of 50 Hz (EMF of IF of 50 Hz). We studied
the impact of EMF of IF of 50 Hz on the energy
germination of mid-ripening spring barley seeds of
promising varieties Vakula, Vikont, Ratnik. Carrying
out the experimental studies we used a laboratory
setup with annular pole points of rectangular
cross section. Our disperse analysis resulted in data
on germinative energy of seeds of spring barley
varieties Vakula, Vikont, Ratnik, which showed that
while treating seeds of spring barley by an alternating
electromagnetic field of industrial frequency of
50Hz, we obtained the best values of germinative
energy of seeds of Variety Vikont with a mode of
processing being equal to W = 16%, T = 2 c, L =
0,03 m
Studies were conducted on pure-bred pigs CT and
DM-1. An analysis of variance of economically useful
signs and interior indicators pigs using dietary
supplements "Vita selenium" and "Jerusalem
artichoke"
For the research period (2003-2016), 57 pest species
and 46 pathogens were recorded on stone and
pomaceous fruits in humid Russian subtropics,
among which the representatives of the order
Lepidoptera and the division Ascomycota
predominate. The greatest number of the species was
recorded on the apple tree - 35 pests and 25
pathogens, the smallest - on cherry and sweet cherry
trees (13 and 10, respectively). 43,7 per cent of the
species are polyphages, while the relative abundance
of monophages among fungi is higher than among
arthropods. The species with activity in the summer
are prevalent. A group of species that are harmful in
humid subtropical environments all year round (11
species of phytophages and 19 pathogens) was
identified. Analyzing the changes in the species
composition of the complex through the time, we can
speak about the relative stability of the dominant
species. The group of the typical dominant species of
pests for almost a century has included Grapholita
molesta Busck., G. funebrana Tr., Cydia pomonella
L., Taphrina deformans (Berk.) Tul., Stigmina
carpophila (Lév.) M.B. Ellis, Monilinia laxa (Aderh.
et Ruhland) Honey, M. fructigena Honey,
Podosphaera leucotricha (Ellis & Everh.) E.S.
Salmon, Venturia carpophila E.E. Fisher and pear
V. pyrina Aderh. Eriosoma lanigerum Hausm.,
Scolytus mali Bechst. and Tranzschelia prunispinosae
(Pers.) Dietel are currently dropped out
from the group of the dominants; Halyomorpha halys
Stål, which is a new pest for Russia, was added.
Groups of the species with sharp fluctuations in
abundance or frequently encountered were
distinguished
The exchange experiments results have proved that in terms of aflatoxicose risk the best indicators of the digestion were revealed for the broiler chickens of the native cross “Smena-4” and foreign “Ross 308” using the toxi-nyl admixtures
The anthers of glutinous rice variety Violetta (1400) have been grown in medium N6 producing 72 calluses. Transplanting the calluses to regeneration medium MS gave 7 green fertile plants and one sterile. After 10 months the long cultivated calluses of the glutinous rice Violetta produced regenerated plants. They were passed onto MS medium containing 5 mg/l 6-benzylaminopurine and 1 mg/l IAA. Clonal reproduction was used for production of more haploid regenerated plants
In this article, an anthropogenic influence on natural
ecosystem such as an excavation of sand is discussed.
Investigations were done in Kuyar Forest District of
the Mari El Republic on a sandpit. The adjacent plot
of natural forest was taken as a control. For evaluation
the degree of environment transformation as a result of
sand excavation several indicators were used. As
indicators of physical soil degradation - thickness of
organogenic horizon and soil density; for assessment a
chemical degradation – content of main nutrients and
humus; as an indicator of biological degradation – the
level of active microbial biomass. Besides, a potential
phytotoxicity was estimated. The study proved:
physical and chemical parameters corresponded with
the fourth degree of soil degradation, at the same time,
biological parameters approximated to parameters of
soil from natural territory
To develop the novel herbicide antidotes for the
sunflower vegetative plants, the group of chemical
compounds, belonging to the derivatives of 2-
alkylthionicotinonitrile was synthesized and their
antidote activity both in the laboratory and field
experiments was studied. The compounds with a high
antidote effect were found