scholarly journals Resource efficiency in ecological technologies of tomato production in the conditions of hydrothermal climate tension

2021 ◽  
Vol 843 (1) ◽  
pp. 012027
Author(s):  
E V Kalmykova ◽  
O V Kalmykova
Keyword(s):  
Growth Regulator ◽  
Growth Period ◽  
Initial Growth ◽  
High Quality ◽  
Tomato Production ◽  
Effective Measure ◽  
Lower Volga Region ◽  
Good Taste ◽  
Vegetable Products ◽  
Sowing Seed

Abstract The complex conditions of the modern period of agricultural production development determine the need to develop new elements of technologies adapted to modern conditions of land use. The article presents the results of studies of the growth regulator effect on obtaining high-quality tomato products. It is proved that the organosilicon preparation Energy-M stimulated the growth and development of plants, increased the productivity of tomatoes in the acutely arid conditions of the Lower Volga region. The object of the study was the tomato variety Hercules. The highest yield of tomatoes with the formation of a large number of large fruits with good taste indicators was obtained on the variety Hercules on the variant with pre-sowing seed treatment, as well as non-root treatment of plants in the initial growth period and in the budding-flowering phase. The use of the Energy-M growth regulator on tomato culture is an effective measure. It is recommended that producers of high-quality vegetable products widely use this drug against the background of sufficient mineral nutrition by soaking the seeds before sowing and processing the plant throughout the growing season.

scholarly journals Effectiveness of Growth-regulator Energy-M By Seedlings of Tomatoes in Strict Arid Conditions of the Low Volga Region

2019 ◽  
Author(s):  
Alexander Ivanovich Belyaev ◽  
Anna Mikhaylovna Pugacheva ◽  
Nikolay Yur’evich Petrov ◽  
Yelena Vladimirovna Kalmykova ◽  
Ol’ga Vladimirovna Kalmykova ◽  
...  
Keyword(s):  
Growth Regulator ◽  
New Technologies ◽  
Initial Period ◽  
Vegetation Period ◽  
Volga Region ◽  
Vegetable Production ◽  
High Quality ◽  
Foliar Nutrition ◽  
Effective Measure ◽  
Arid Conditions

The complicated conditions of the modern period of intensification of agricultural production cause the necessity in the development of new technologies adapted to current conditions of land use. Thereby we have developed the concept of “The system of technological measures for growing of vegetable cultures providing the rational effective use of material and energy resources and getting of economically profitable yields”. The paper presents the results of research on the effectiveness of growth-regulator for getting of high-quality yield of tomatoes. It was approved that the organosilicone product Energy-M stimulated plants‘ growth and development, and increased the productivity of tomatoes in strict arid conditions of the Low Volga region. The object of research was the tomato grade Hercules. The highest yields of tomatoes with the formation of big quantity of large fruits with pretty good eating characteristics were harvested when planting of the grade Hercules on the site with pre-sowing treatment of seeds and foliar nutrition of plants during the initial period of growth and the phase of budding-blossom. The application of the growth-regulator Energy-M on tomato sowings is an effective measure. The producers of high-quality vegetable production are recommended to use the said product widely when sufficient mineral nutrition by moistening of the seeds prior to sowing and by the treatment of the plants during the whole vegetation period.

Epitaxial growth manner and structure of superconducting oxide films

1990 ◽  
Vol 48 (4) ◽  
pp. 2-3
Author(s):  
Yoshichika Bando ◽  
Takahito Terashima ◽  
Kenji Iijima ◽  
Kazunuki Yamamoto ◽  
Kazuto Hirata ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Film Surface ◽  
High Energy ◽  
Epitaxial Films ◽  
Layer By Layer ◽  
Initial Growth ◽  
In Situ Growth ◽  
High Quality ◽  
Activated Reactive Evaporation

The high quality thin films of high-Tc superconducting oxide are necessary for elucidating the superconducting mechanism and for device application. The recent trend in the preparation of high-Tc films has been toward “in-situ” growth of the superconducting phase at relatively low temperatures. The purpose of “in-situ” growth is to attain surface smoothness suitable for fabricating film devices but also to obtain high quality film. We present the investigation on the initial growth manner of YBCO by in-situ reflective high energy electron diffraction (RHEED) technique and on the structural and superconducting properties of the resulting ultrathin films below 100Å. The epitaxial films have been grown on (100) plane of MgO and SrTiO, heated below 650°C by activated reactive evaporation. The in-situ RHEED observation and the intensity measurement was carried out during deposition of YBCO on the substrate at 650°C. The deposition rate was 0.8Å/s. Fig. 1 shows the RHEED patterns at every stage of deposition of YBCO on MgO(100). All the patterns exhibit the sharp streaks, indicating that the film surface is atomically smooth and the growth manner is layer-by-layer.

Improvement of separate elements of the techno-logy of cultivation of white cabbage in the conditions of the of the central region of the non-chernozem zone

2020 ◽  
Author(s):  
A.V. Konstantinovich ◽  
◽  
A.S. Kuracheva ◽  
E.D. Binkevich
Keyword(s):  
Seed Treatment ◽  
Unit Area ◽  
Growing Season ◽  
Agricultural Products ◽  
Stress Factors ◽  
High Quality ◽  
Temperature And Precipitation ◽  
White Cabbage ◽  
Sowing Seed

In conditions of climate change, when temperature and precipitation fluctuations occur more and more frequently during the growing season, it is necessary to obtain high quality seedlings with "immunity" to various stress factors, including high weediness, the damage from which is associated with a decrease in yield (by 25 -35%) and with a deterioration in the quality of agricultural products. Due to the imbalance in production technology, seedlings are often weakened, overgrown, with a low yield per unit area and survival rate in the field. One of the solutions to this problem is the use of PP for pre-sowing seed treatment to increase the competitiveness of seedlings in the field.

scholarly journals Investigation of the Heteroepitaxial Process Optimization of Ge Layers on Si (001) by RPCVD

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 928
Author(s):  
Yong Du ◽  
Zhenzhen Kong ◽  
Muhammet Toprak ◽  
Guilei Wang ◽  
Yuanhao Miao ◽  
...  
Keyword(s):  
High Temperature ◽  
Buffer Layer ◽  
Layer Thickness ◽  
Growth Temperature ◽  
Crystalline Quality ◽  
Initial Growth ◽  
Two Dimensional ◽  
High Quality ◽  
Reduced Pressure

This work presents the growth of high-quality Ge epilayers on Si (001) substrates using a reduced pressure chemical vapor deposition (RPCVD) chamber. Based on the initial nucleation, a low temperature high temperature (LT-HT) two-step approach, we systematically investigate the nucleation time and surface topography, influence of a LT-Ge buffer layer thickness, a HT-Ge growth temperature, layer thickness, and high temperature thermal treatment on the morphological and crystalline quality of the Ge epilayers. It is also a unique study in the initial growth of Ge epitaxy; the start point of the experiments includes Stranski–Krastanov mode in which the Ge wet layer is initially formed and later the growth is developed to form nuclides. Afterwards, a two-dimensional Ge layer is formed from the coalescing of the nuclides. The evolution of the strain from the beginning stage of the growth up to the full Ge layer has been investigated. Material characterization results show that Ge epilayer with 400 nm LT-Ge buffer layer features at least the root mean square (RMS) value and it’s threading dislocation density (TDD) decreases by a factor of 2. In view of the 400 nm LT-Ge buffer layer, the 1000 nm Ge epilayer with HT-Ge growth temperature of 650 °C showed the best material quality, which is conducive to the merging of the crystals into a connected structure eventually forming a continuous and two-dimensional film. After increasing the thickness of Ge layer from 900 nm to 2000 nm, Ge surface roughness decreased first and then increased slowly (the RMS value for 1400 nm Ge layer was 0.81 nm). Finally, a high-temperature annealing process was carried out and high-quality Ge layer was obtained (TDD=2.78 × 107 cm−2). In addition, room temperature strong photoluminescence (PL) peak intensity and narrow full width at half maximum (11 meV) spectra further confirm the high crystalline quality of the Ge layer manufactured by this optimized process. This work highlights the inducing, increasing, and relaxing of the strain in the Ge buffer and the signature of the defect formation.

scholarly journals EFFECTS OF MICROPROPAGATION TECHNIQUES ON GROWTH. AND DEVELOPMENT OF MINIATURE ROSES.

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1138a-1138
Author(s):  
C.Y. Chu ◽  
S.L. Knight
Keyword(s):  
Growth And Development ◽  
Low Cost ◽  
High Potential ◽  
Internode Length ◽  
Photon Flux ◽  
Initial Growth ◽  
Multiplication Rate ◽  
Stem Tissue ◽  
Photosynthetic Photon Flux ◽  
High Quality

An efficient micropropagation system is being investigated to produce low cost and high quality miniature rose plants. Dormant literal buds of miniature roses were cultured on media containing MS, 30 g·l-1 sucrose, 8 g·l-1, and 25 combinations of NAA and BA. Initial explant growth was achieved on a medium containing NAA at 0.001-0.01 ppm and BA at 0.1 ppm. The highest multiplication rate was achieved when explants were subcultured on a medium containing MS, NAA at 0.01 ppm, BA at 2 ppm, and sucrose at 30 g·l-1. Growth was enhanced after culturing when dormant buds had more parental stem tissue. In addition, explants from the lowest two nodes with the shortest internode length exhibited the poorest growth. The higher the photosynthetic photon flux (PPF) (5 to 40 μmol·s-1m-2), the more quickly explants grew and aged. The most optimal PPF for initial growth was 20 μmol·s-1m-2. Subculture microcuttings of one cm or more in length grew vigorously one month after cuttings were dipped in 1000 ppm IBA and placed on a mist bench. Our results indicate that micropropagation of miniature roses has high potential for use in commercial industry.

scholarly journals Freshwater Composition and Connectivity of the Connecticut River Plume During Ambient Flood Tides

2021 ◽  
Vol 8 ◽  
Author(s):  
Michael M. Whitney ◽  
Yan Jia ◽  
Kelly L. Cole ◽  
Daniel G. MacDonald ◽  
Kimberly D. Huguenard
Keyword(s):  
Mixing Time ◽  
Growth Period ◽  
Tidal Currents ◽  
Surface Flow ◽  
River Plume ◽  
Tidal River ◽  
Initial Growth ◽  
Connecticut River ◽  
Tidal Period ◽  
Source Waters

The Connecticut River plume interacts with the strong tidal currents of the ambient receiving waters in eastern Long Island Sound. The plume formed during ambient flood tides is studied as an example of tidal river plumes entering into energetic ambient tidal environments in estuaries or continental shelves. Conservative passive freshwater tracers within a high-resolution nested hydrodynamic model are applied to determine how source waters from different parts of the tidal cycle contribute to plume composition and interact with bounding plume fronts. The connection to source waters can be cut off only under low-discharge conditions, when tides reverse surface flow through the mouth after max ambient flood. Upstream plume extent is limited because ambient tidal currents arrest the opposing plume propagation, as the tidal internal Froude number exceeds one. The downstream extent of the tidal plume always is within 20 km from the mouth, which is less than twice the ambient tidal excursion. Freshwaters in the river during the preceding ambient ebb are the oldest found in the new flood plume. Connectivity with source waters and plume fronts exhibits a strong upstream-to-downstream asymmetry. The arrested upstream front has high connectivity, as all freshwaters exiting the mouth immediately interact with this boundary. The downstream plume front has the lowest overall connectivity, as interaction is limited to the oldest waters since younger interior waters do not overtake this front. The offshore front and inshore boundary exhibit a downstream progression from younger to older waters and decreasing overall connectivity with source waters. Plume-averaged freshwater tracer concentrations and variances both exhibit an initial growth period followed by a longer decay period for the remainder of the tidal period. The plume-averaged tracer variance is increased by mouth inputs, decreased by entrainment, and destroyed by internal mixing. Peak entrainment velocities for younger waters are higher than values for older waters, indicating stronger entrainment closer to the mouth. Entrainment and mixing time scales (1–4 h at max ambient flood) are both shorter than half a tidal period, indicating entrainment and mixing are vigorous enough to rapidly diminish tracer variance within the plume.

Development of individual elements of the technology for growing determinant tomato hybrids on subirrigation aeroponics "Fitopiramida "

2020 ◽  
Author(s):  
Kh. Farawn ◽  
◽  
V.I. Leunov ◽  
T.A. Tereshonkova ◽  
M.N. AL-Rukabi
Keyword(s):  
Environmental Pollution ◽  
Production Technology ◽  
Test Results ◽  
Tomato Production ◽  
Yield Increase ◽  
Vegetable Products ◽  
Urgent Task ◽  
Early Ripening ◽  
Low Volume ◽  
Selection For

In modern conditions of progressive environmental pollution, the need to save water and electricity, the production of fresh vitamin, environmentally friendly vegetable products on multi-tiered plants can be considered an urgent task. The article discusses the results of experiments on the development of individual elements of tomato production technology on a hydroponic multi-tiered pipe growing plant "Fitopiramida ". It was revealed that 2 foliar dressings at a dose (N: P: K 10:54:10) 2.5 g / l + Maxifol 2 g / l) - have a significant effect on the productivity and productivity of determinant tomato hybrids Flame F1 and Rosana F1, providing a yield increase in comparison with the control by 7.87 kg / m2 and 2.52 kg / m2, respectively. Testing of 24 varieties and hybrids of the determinant type made it possible to identify the 3 most early ripening varieties with a ripening period of 85-90 days. Based on the analysis of the test results, the directions of tomato selection for the conditions of low-volume technology are outlined. The main features are formulated for the determinant hybrid model for the " Fitopiramida " technology.

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