Search

The aim of the research is increasing the productivity of potatoes via the use of organic fertilizers. Research was carried out on crop rotation fields with potato plantations of Arnica and Arosa breeds. The distance between the ridges is 75 cm, the ridge height is 18-20 cm, and the distance between seats in a row is 24 cm. In the applied crop rotation, potato was planted on fallow steam. The object of study is the soil of the upper farm field (0-30 cm). The results of applying programmed soil fertilizers for potato plants consisting of background mineral fertilizers N120P150K300 and manure in doses of 20 t/ha and 60 t/ha for four experimental plots with an area of 210 ha are pre-sented. Determination of heavy metal content was performed within the certified laboratory of the Federal state Uni-versity «Station of agro-chemical service «Samara» by atomic absorption spectroscopy. Based on the results of heavy metals mobile forms in the soil, a concentration coefficient was calculated, which showed that the actual av-erage value exceeds the background level. The lead concentration coefficient amounting to 1.6 – indicates the ac-cumulation of the element on the research area. Organo-mineral fertilizer N120P150K300+manure 60 t / ha allows you to restore the balance of mould on the research ordinary Chernozem, get an increase in yield of 4.1-8.9 t / ha, has an effect on reducing the content of gross heavy metals in the soil: Cd – by 1.2-1.4 times; Cu – 1.1-1.2 times, Pb, Zn, Mn and Fe – 1.1 times compared to the control area. Within the experiment N120 P150K300 + manure 60 t / ha lead mobility reduces to 3.9%, copper, zinc, iron-less than by 1 %, cadmium mobility increases by 3.4-5.7 %.

The aim of study is reduction of accumulation of heavy metals in agrocenosis of pulse crops due to the action of biologically active substances in the conditions of the middle Volga forest. An experiment study in order to reveal the effect of pre-sowing seed treatment with biologically active substances on the accumulation of heavy metals by soils and plants in agrocenoses of peas and soybeans was conducted in 2013-2015. The results of pre – sowing treatment of soybean seeds of the Samer 3 breed and peas of the Flagman 12 with the Rizotorfin and Rizotorfin in combination with analogues – Agrica and Humariz biologically active substance are presented. The analysis of heavy metals content in soil and plant samples was performed in the laboratory of the «Samara agrochemical ser-vice» Station by method of atomic adsorption spectroscopy. It is established that the introduction of biologically ac-tive substances into the soil containing heavy metals can reduce the concentration of their mobile forms and restrict access to grain. The content of mobile forms of elements in the soil under soybean growing areas, in comparison with the control, decreases: lead by 1.14 times when treated with Rhizotorphin+Humariz, cadmium – 1.18 times when treated with Rhizotorphin, copper – 1.2 times and cobalt – 2.0 times under the influence of the combination of Rhizotorphin and Agrica. According to the coefficients of biological absorption of pea and soy grains, the studied heavy metals are referred to the elements of biological capture of CАB

The purpose of this study is to develop agrotechnological methods of establishing and controlling the content of heavy metals in plant products. For laboratory experiments we used the typical black soil. The results of lead and copper in soil and plants of spring wheat variety Kinelskaya 59, with different levels of pollution in the conditions of a pot experiment. It is established that with the increase of applied doses of salts of heavy metals increases their content in soil and spring wheat seedlings. The percentage of mobility in the soil of copper and lead in the soil increases with the pollution level 2.9 times and 9.2 times, respectively. With increasing doses of copper and lead increases the concentration of plant-available forms of nitrogen and phosphorus. For all variants of experience is typical acropetal distribution of heavy metals in plants – copper: the roots (46.59) > shoots (of 14.66); lead: the roots (47.0) > shoots (12.78). The value of Iа decreases with increasing dose of applied salt that is indicative of the culture of spring wheat variety Kinelskaya 59 barrier. High correlation observed between the content of copper in plant roots and gross values (r = 0.98) and mobile forms(r = 0.94) in the soil. The value of copper in the shoots of plants are weaker related to the content of the element in the soil (r = 0.66). Between the content of gross and mobile forms of lead in soil revealed a high correlation (r = 1.00), the same value when item is marked with the plant roots and shoots.

Статья посвящена практико-ориентированному обучению при подготовке специалистов лесного хозяйства. Приводятся опыт организации учебного процесса студентов на кафедре «Лесоводство, экология и безопасность жизнедеятельности» с использованием производственной площадки учебного лесного питомника.

This article contains results of data processing on pedestrian detection test. Pedestrian detection is herein implemented using the automotive MIMO radar. Probing signal is frequency-modulated continuous wave in the band range of 77 – 81 GHz. The description of all the equipment used during following test is also included. The pedestrian detection ranges are derived via coherent and incoherent signal integration.

This article contains experimental results of object detection in a typical urban environment using millimeter-wave radar and comparative analysis of those results with the data obtained employing simulation model.

Accurate evaluation of ultrasonic wave attenuation is important in many medical applications of ultrasound. The aim of this work is to present a thorough analysis of the effectiveness of using complementary Golay coded sequences (CGCS) during the evaluation of ultrasound attenuation in tissue-like materials, especially at greater depths or at high attenuation. In order to compare the results of the attenuation measurement with the use of CGCS transmission and a short two sine cycles pulse, ultrasound backscattered from medium with predefined attenuation of 0.3, 0.7 and 2 dB/[MHz × cm] were simulated. Also for the same transmission signals, measurements of ultrasound echoes scattered in the tissue phantom with an attenuation of 0.5 dB/[MHz × cm] were performed. In the case of numerically simulated data, for the CGCS excitation, the maximum depth for which the attenuation was correctly determined increased from 55 mm to 80 mm for the 0.7 dB/[MHz × cm] phantom and from 20 mm to 50 mm for the 2 dB/[MHz × cm] phantom compared to excitation of the transducer with a short two sine cycles pulse. When the measurement data obtained using the tissue phantom was used to estimate the attenuation coefficient, the relative error was determined to be 6% and 16% for the depths of 10 mm and 40 mm for the short two sine cycles pulse excitation, respectively. Corresponding values for CGCS excitation and considered depths were 2% and 4%. The use of CGSC sequence during attenuation measurements increases measurement accuracy and can improve medical diagnostic techniques.

Structural instability has a strong influence on the understanding of superconductivity in iron-containing 122 phases. Similar to the 122 iron-based high-temperature superconductors, the intermetallic compound BaNi2Ge2 undergoes an orthorhombic-to-tetragonal structural phase transition. The compound was prepared by arc-melting mixtures of the elements under an argon atmosphere. Single crystals were obtained by a special heat treatment in a welded tantalum ampule. The crystal structure of the compound was investigated by powder and single-crystal X-ray diffraction. Differential thermal analysis of BaNi2Ge2 showed a reversible phase transition at ca. 480 °C. In situ temperature-dependent synchrotron powder X-ray diffraction studies revealed that below 480 °C the crystal structure of BaNi2Ge2 is orthorhombic [own structure type, space group Pnma, a = 8.3852(4) A, b = 11.3174(8) A, and c = 4.2902(9) A at 30 °C] and the high-temperature phase above 510 °C belongs to the tetragonal ThCr2Si2-type structure [spac...