There were reviewed the results of the study of the
dependence of main of phenological phases of
development of corn hybrids of different maturity
groups of selection of Krasnodar Research Institute of
Agriculture named. P.P. Lukyanenko in a zone of
sufficient moisture of Central Ciscaucasia (Ross 199,
Ross 299, Krasnodar 382 and Krasnodar 410) and the
All-Russian Research Institute of Corn (Mashuk 170,
Newton, RIC 345 and Eric), as well as early-middle
middle Rossiyskaya 1 from the change of average daily
air temperature at different dates of sowing and preplant
seed treatment by the preparation "TMTD-plus"
containing the growth promoter called Krezatsin in its
composition. The studies were conducted in
accordance with the thematic plan of scientific
researches of the department of crop and forage
production of Stavropol State Agrarian University. The
technology of maize growing on the experimental plot
corresponds to the standard technology for this area
and culture. The sowing was performed in three stages.
The first (early) sowing period was at t = + 7 ... +8 ° C.
The second (recommended) – was at t = + 10 ... + 12 °
C. The third (later) sowing period was carried out at t
= +15 ° C. There was identified a high inverse
correlation between the average daily air temperature
and the duration of the intraphase periods of maize
propagation. Thus, at the shifting of maize sowing
dates with the second half of may on the second half of
April, the optimization of heat regime in the generative
period and rising of efficiency of use of thermal of
resources of the region. There was marked the
acceleration of development of corn seedlings when
the average daily air temperatures was up to +12 ° C
at the samples with the application of the disinfectant
TMTD-plus
There are given the results of long-term research of different forms of soil nitrogen content and their relationships with the content of total nitrogen in leaves and yield. It was detected a strong positive correlation among them hydrolyzable nitrogen content in the soil and total nitrogen content in the leaves and yield. It is proposed the use of this index for diagnostic of soil nitrogen supply
The purpose of the researches was the necessity of
deep study of hydraulic dimensionless expense
descriptions of regulative organ of model standard of
band regulator of water, for rice checks. Rice is one
of the most moisture-loving agricultural cultures. Its
productivity straightly depends on adjusting of water
level in rice cotter pins on the different periods of
development of this culture: period of primary
submergence of check, fight against weeds, primary
vegetation, phases of bushing out, vegetations of
suckling and cereous ripeness. On each of the
considered periods of development of plant the
guided water level is needed, that high-quality can be
realized only at application of the systems of
automatic control. In rice irrigation systems there is
plenty enough of losses of water due to not managed
leakage in regulator flow and water level in the
closed position. An actual and meaningful task is
development, research and introduction in practice of
reliable and high-efficiency regulators expense and
water level for rice checks. The article presents
results of research of hydraulic dimensionless
expense descriptions of regulative organ of model
standard, developed by us. Intercommunication of
degree of influence is investigational, on the basis of
application of methods of planning of experiment, on
the function of response, which dimensionless
expense description of regulative organ of model
standard of band regulator of water, relations of
diameters of the downlow openings, is taken for, at
the different relation of workers pressures. From
appraised experimental data approximation
dependences, which were in same queue analysed for
the purpose cross-correlation connection,
determination, elasticity, are built. Also, in the article
there is an estimation of statistical meaningfulness of
the built model of regression given with the use of
criterion of F - Fishera and parameters of
equalization of regression with the use of criterion of
t - St'yudenta, at the set level of meaningfulness α. At
the permanent relations of workers pressures the
analysis of sections of surface of response H/Нmax
0,6; 0,8; 1,0 shows that functions have extremums on a maximum. At minimum relations of workers
pressures H/Нmax equal 0,6 the maximal value of
function of response is equal 81% it will be at the
relation of diameters of the downlow openings of
d/dmax equal 0,9. With the increase of relation of
workers pressures H/Нmax to 0,8 have a trend of
maximum toward an increase and here he comes at
the value of function of response equal 94% and
relation of diameters of the downlow openings of
d/dmax equal 0,92. Further increase of relation of
workers pressures of H/Нmax to 1,0 also results in
the trend of a maximum of function of response
which arrives at a value 118%, here the relation of
diameters of the downlow openings of d/dmax is
equal to 0,94. The combined analysis of curves
shows that at any relation of workers pressures, the
degree of influence on the function of response
increases due to more relation of diameters of the
downlow openings
The article discusses the hybridological analysis of the
inheritance of plant resistance of winter wheat to
brown rust Putignano. For this purpose, we performed
the analysis on the varieties of wheat of local selection,
studied immunological reaction to R. triticina in
connection with the types of wheat resistance to leaf
rust pathogen. In the work, we considered the different
immunological parameters (type of plant response to
the introduction of the pathogen, the intensity of
infection of plants, the size of urediniospores, the
number of urediniospores in one urediniomycetes, the
amount of time from the time of inoculation until the
beginning of the first urediniomycetes (i.e. a measure
of latent period) and the area under the curve of
disease development). Study of the inheritance of the
type of plant responses to the introduction of the
pathogen by the method of hybridological analysis
revealed that this immunological reaction can be
controlled by both dominant and recessive genes.
Monogenic control of resistance in our study was
fairly uncommon and installed from THERE 200
varieties and Purdue 5396. It is shown that the
majority of the examined lines type of plant response
to the introduction of the leaf rust pathogen is
controlled, as a rule, several genes with different types
of interaction. The results of hybridological analysis
allow to draw a conclusion about what type of plant
response to the introduction of the parasite – an
integral indicator that takes into account the
morphological peculiarities of urediniomycetes (the
size and number of urediniospores produced in them)
Based on many years balance studies, the possibility of humus stock maintenance in common black soils for crop rotations of different structures is given in the article. Fertilizer omitted crop rotations with bare fallow and without it, with perennial legumes and small variations in parts of other crop are considered
In the article, we have made an attempt to develop and calculate a model of humus content estimation in the black leached soil according to remote sensing of the ground. We have presented the model which has a number of restrictions for its continuous use when carrying out soil environmental monitoring of land grounds. It is established, that for calculation of similar model it is necessary to perform the cameral works including selection and the preliminary analysis of fields, including using of contemporary records of Remote sensing of the ground for definition of sampling points, to carry out an assessment of space photo shooting and sampling of soils in optimum terms with the maximum synchronism (cameral work and soil and agrochemical inspection), to make the analysis of the selected samples of soils for humus content with traditional methods, and finally to calculate regression models with use of data of the carried-out space shooting and the agrochemical analysis of soil samples
Results of the long studies of the horizontal structure of different plantings in Mid-Siberia are presented in article. The horizontal structure of the plantings is characterized with significant variety of trees placing. Maximum full (normal) plantings of pines with uniform structure are characterized by casual trees placing. The modal plantings of pines with determined probability were characterized by group placing of trees.
Cedar and fir plantings with different structure have a group distribution of trees and young plants that is normal for the nature of these woods.
The research results of minimization of negative herbicide after-effect on winter wheat root system formation and damage by root rots are reviewed in this article
Under the current conditions, it is very important to
boost the production of pork and improve its sanitary
and hygienic quality for the successful handling of
problems subjected to import substitution of meat
products. This can be reached by means of
strengthening of food reserve. For that purposes, in the
frame of two experiments yacon tubers in combination
with enzymatic agent protosubtilin GZx have been
introduced in the intakes of fattening pork stores
instead of fodder beat, and various doses of carbitox
adsorbent have been additionally added when
superfluous background of heavy metals was
observed. During the 1st experiment, the substitution of
fodder beet with the similar quantity of yacon tubers
has allowed the animals of experimental group to
outweigh the ones from the control group on 7,5% in
the terms of gross formation of body weight, and to
gain 100 kg of body weight for 7 days ahead of the
animals from control group as well. Additionally,
fodder costs per product have been reduced and the
morphological and biochemical values of animals
blood have been optimized. Based on the data from
2
nd experiment, it has been defined that the better dose
for feeding of adsorbent carbitox was 2,0 kg per tonne
of concentrates thereby the animals of 3rd experimental
group had reasonably higher body weight gain and
thereby higher feed-conversion ratio by products.
Therewith, the animals intermediary metabolism has
been speeded up due to optimization of morphological and biochemical values of blood and reduction of
heavy metals content in blood serum, in other words
level of zinc, lead and cadmium was not exceeding
maximum allowable concentration
The article presents the indicators of bio-productivity of phytocenoses and improvement of their structural performance, depending on the design of planting