This article discusses the adaptive nature of the correlations between the elements and sub-elements of the productivity of main spike of the F1, and F2 hybrids, constant breeding lines (F3, F4) and parental varieties. We have shown the possibility to determine the individual components of spike productivity with a selective advantage in the selection of winter wheat on the adaptability and efficiency in the conditions of the region
The researches have been carried out on hogs of Steppe type (ST) of fast-ripening meat breed (FM – 1), large white breed (LW) and their cross-breeds ST*LW, LW*ST. Researches showed that gilts LW excelled the patterns of PSE – port in pH. NOR – port, in its turn, was distinguished by higher contents of components composing dry and organic matter. The superiority of cross-bred hogs ST*LW over LW*ST according to the quantity of triptofan in pork was determined. The analysis of physic-chemical properties of fat has shown, that gilts of Steppe type with PSE – pork were distinguished by lowered to of fat melting and increased iodine quantity against NOR – quality pork
The analytical description of the change of the temperature distribution in the container for planting during time has been created. The analytical formula is derived by the way of mathematical processing of the experimental data of the temperature distribution on the surface of the container and inside the sub-strate
Remineralization of leached black soil was carried out by making such rocks as loess-like loam, shell limestone, apatite phosphogypsum. It was revealed, that the introduction of species did not change substantially the content of boron during the growing season. The manganese content in relation to the control increased by 13-15%, 25-30% for copper, zinc, 35-45%, 25-30% cobalt, and molybdenum in 2-3 times, and especially when combined application of rock. Seasonal dynamics was expressed, but does not give definite pattern
The article presents results of studying the total content and the forms of Nickel in the Western Caucasus leached Chernozem at three rotations of 11-fild grain-grass-arable crop rotation. The Nickel content in the soil is close to its Clark (40 mg/kg) and significantly lower than UEC (80 mg/kg). Scientifically based system for fertilizing crop rotation does not lead to the accumulation of Nickel in the soil, but creates the conditions for increasing its mobility. In the future, we may experience the need of the inclusion of Nickel into the system of fertilization of crops grown on leached Chernozem. The Nickel content in the leached Chernozem before development of crop rotation was generally close to Clark soils of the world (40 mg/kg) and significantly lower than UEC (80 mg/kg), which favors the production of high quality produce. After three rotations of the crop rotation without using fertilizers, the total content of Nickel and acid-insoluble form in the soil decreased slightly, but the number of the element extracted with both buffer and acid extractor, increased insignificantly. The decrease of the total content of Nickel and its reserve (acid-insoluble) fund in the soil we explain with the annual exclusion of the element with harvests crops from the fields, and the trend of increasing mobile and acid-soluble - mineralization of humus followed by acidification of the soil. Systematic mineral fertilization on field crop rotation was slightly up for the Nickel fund of the soil, but did not ensure the recovery of the initial level. At the same time, at fertilize crop rotation we observed a clear trend of increasing the number of rolling and acid-soluble Nickel. If we consider that the value of the MPC for moving Nickel is equal to 6 mg/kg, these changes may not have any negative environmental impacts, but rather will encourage the use of this ultra-microelement by plants
The article presents the results of the study on the magnesium mode of leached chernozem of Western Ciscaucasia at three rotation of grain-grass-tilled crop rotation. Magnesium in the soil is represented mainly by non-exchangeable form, the number of which is estimated at 90,18 and 91,29 % of gross reserves. Exchange forms of magnesium are 8,68 and 7,71 % respectively in arable and the subsurface layer. The share of water-soluble and organic forms account for less than 1 % - of 0.62 and 0.68 and 0.46 and 0.38% respectively. For three rotation 11-full rotation of gross stocks of magnesium in the soil in which crops were grown without fertilizers has decreased by 0.02 % (200 mg/kg), with fertilizers of 0.03 and 0.02 % (300 and 200 mg/kg). Intense magnesium has been leached from the topsoil. There was a change of the soil content of the forms of magnesium. In the rotation without fertilizer, the share of non-exchangeable magnesium in the General Fund item increased from baseline by 0.27 % in arable and 0.11% of the subsurface layer of soil that the absolute content decreased. The amount of water-soluble, exchangeable and organic magnesium of the soil decreased. Reducing the amount of water-soluble (0.05 and 0.06 %) and metabolic (0.18 and 0.02 %) of magnesium was due to its consumption of the plants. The proportion of magnesium organic part of the soil is reduced as a result of steadily declining yields, and, therefore, the amount of organic residues. In crop rotation, use of mineral fertilizers we have observed different behavior of magnesium compounds in the soil. The number of non-exchangeable magnesium decreased from baseline by 0.13 % in arable and 0,58 % of the subsurface layer of soil. The content of the exchange of magnesium increased respectively 0.43 and 0.41 %, water soluble - 0.13 and 0.10 %, and the organic part of the soil - 0.02 and 0.02 %
The article presents results of the studies that
obtained because of the long-term experience of the
Department of Agricultural Chemistry of Kuban
State Agrarian University. We have found the
optimal dose of micronutrients at different levels of
mineral nutrition, to achieve maximum yield of
green mass of alfalfa quality. We have calculated the
dynamics of the accumulation of nutrients in plants
throughout the growing season
The article describes the results of studies on elemental composition of corn grain under various fertilizer treatments. The balanced application of fertilizers is an important factor in optimizing corn nutrition on ordinary black soils and obtaining ecologically safe
and clean crop production
The contents of lead in soils are primarily determined by regional factors: the composition of parent rocks, relief, climate, vegetation. In recent years, these factors have increased the anthropogenic source of element. In order to assess its impact, requires knowledge of the natural, i.e., background lead levels, the so-called reference points, which can later be used to monitor changes occurring in the soil. Under background refers to the content of the element in soils at a great distance from the areas of receipt of contamination. Background content of lead in each type of soil depends mainly on composition of parent rocks. The correlation coefficient between the content of lead in parent rocks and soils, with the background contents is equal to 0,86±0,17 at p=0,95. For each soil type there are low variations in lead content due to the composition of parent rocks. Lead concentrations in the soils increased at the expense of its receipt from the atmosphere, irrigation water, drainage during mining, as a result of agricultural use, lead containing chemicals. Comparing the obtained results with existing currently permissible concentrations (APC, MPC) it is necessary to note that the lead content in leached chernozem soil after three rotations of the rotation may not cause any pathological changes or anomalies in the course of biological processes and lead to accumulation in the agricultural plants, and therefore may interfere with biological optimum
Nowadays, domestic pig production is dynamically
changing in technological and selection terms and is
one of the most effective sectors. In the current
conditions of pig breeding in intensive technology, the
requirements to the level and direction of pig
production, the rational use of genetic resources are
increasing. The development of effective methods for
the production of pork on the basis of the wide use of
highly productive breeds and types of both imported
and domestic selection allows to obtain the maximum
possible productivity of animals, to produce pork of
good quality, to reduce the cost of production and to
fully realize the genetic potential of animals. Genetic
and selection techniques have significantly changed
the physiological, morphological and productive
capabilities of modern animals. In connection with
this, the actual for the pig industry is the identification
of opportunities to increase the duration of the use of
pigs, and the inclusion of new indicators in breeding
work when creating specialized maternal lines. The
research was carried out on the electronic database
(KP ACC, OOO "Selikom", Ryazan), the breeding
center "Lozovoye" ZAO "Plemzavod-Yubileyniy" of
the Tyumen region. The center is engaged in
thoroughbred breeding and improvement of four pigs:
large white, landrace, pietren, duroc