scholarly journals RESEARCH OF PRODUCTION TECHNOLOGIES, MICROBIOLOGICAL AND AGROCHEMICAL CHARACTERISTICS OF FERTILIZERS BASED ON MONO-, DYCALCIUM PHOSPHATE WITH ZINC PHYTO-COMPOUND: Communication 2. Study of microbiological and agrochemical characteristics of a composition based on mono-, dicalcium phosphate with a phytocompound of zinc

2021 ◽  
Vol 73 (1) ◽  
pp. 169-175
Author(s):  
M.A. Zholmaganbetova ◽  
◽  
S. Usmanov ◽  
Sh. Baybashchaeva ◽  
K. Makhmudov ◽  
...  
Keyword(s):  
Nitrate Nitrogen ◽  
Phosphorus Pentoxide ◽  
Nitrogen And Phosphorus ◽  
Model Soil ◽  
Mobile Forms ◽  
Production Technologies ◽  
Positive Effect ◽  
Effect Of The Composition ◽  
Hydrolyzable Nitrogen ◽  
Good Agreement

On model soil samples, the positive effect of the composition based on mono-, dicalcium phosphates with a phytocompound of zinc on the number of soil microorganisms affecting the nitrogen and phosphorus nutrition of plants and the accumulation of easily hydrolyzable nitrogen and mobile forms of phosphorus pentoxide in the soil was established. Achieved: an increase in the number of nitrogen-fixing microorganisms in comparison with the standards in 3.14-3.2 times and phosphate-mobilizing 3.4-3.42 times; accumulation of soil 11.5-12.7% of easily hydrolyzable nitrogen and 6.9-8.1% of mobile forms of phosphorus pentoxide. In the reference variants, there is a decrease in the content of phosphorus pentoxide mobile forms by 6.9-8.3%, which is associated with the retrogradation of phosphorus pentoxide. A decrease in the number of oligotrophs and denitrifiers, decomposing humus, and nitrate nitrogen of the soil by 2.18-2.15 times and 2.5- 2.56 times is the basis for the preservation of soil fertility. Under the conditions of a microplot experiment, it was determined that the compositions containing a Phyto compound of zinc provide an increase in the yield of raw cotton in comparison with the standards – mono-, dicalcium phosphates 3.9 and 4.3 c/ha. The data obtained are in good agreement with phenological observations, the content of nutrients in the middle of the growing season, and the results of microbiological studies.

Mechanism Analysis and Experimental Research on the Interception of Nitrogen and Phosphorus Pollutants by Gullies in Northern China

2011 ◽  
Vol 250-253 ◽  
pp. 3392-3396
Author(s):  
Yu Jia Song ◽  
Hui Qing Liu
Keyword(s):  
Total Phosphorus ◽  
Nitrate Nitrogen ◽  
Northern China ◽  
Careful Analysis ◽  
Ammonia Nitrogen ◽  
Mechanism Analysis ◽  
Nitrogen And Phosphorus ◽  
Urban Sewage ◽  
Control Section ◽  
Nitrogen Pollutants

The discharge of urban sewage and agricultural non-point source pollutants is the main reason causing eutrophication in gullies in most cities of northern China. Based on a careful analysis on the ecological structure and ecological characteristics of a gully, this article preliminarily studies the interception and degradation mechanisms of nitrogen pollutants by the gully. Meanwhile, to take gullies in Changchun as the object of the study, this article carries out an experiment on the interception effect of nitrogen pollutants by gullies. This experiment respectively establishes a control section in the upper and lower reaches of a gully, and takes water samples four times in each section from May to August to determine total nitrogen, total phosphorus, nitrate nitrogen, ammonia nitrogen and salinity. The result shows: the gully plays some role in the interception of pollutants; total phosphorus accounts for the largest interception in pollutants in the experimented gully section, with the relative interception rate of 27.46%, followed by ammonia nitrogen, with the interception rate of 21.80%, which is the result of the combined effects of aquatic plants, microorganisms and sediment in the gully.

scholarly journals Modelling the hydrology and water quality of 3S river system (Sekong, Sesan and Srepok)

2016 ◽  
Vol 19 (2) ◽  
pp. 107-117
Author(s):  
Trang Thi Thuy Nguyen ◽  
Khoi Nguyen Dao
Keyword(s):  
Water Quality ◽  
Swat Model ◽  
Model Performance ◽  
River System ◽  
Water Quality Assessment ◽  
River Basin Management ◽  
Analysis Tool ◽  
Nitrogen And Phosphorus ◽  
Model Soil

The objective of this study was to simulate the hydrologic characteristic and water quality of 3S rivers system (Sekong, Sesan and Srepok) using SWAT model (Soil and Water Analysis Tool). Agriculture and forest are the main land use types in this basin accounting for more than 80 % of the total area. Therfore, nitrogen and phosphorus were selected to be parameters for water quality assessment. SWAT-CUP model was applied to calibrate the model for stream flow and water quality based on SUFI-2 (Sequential Uncertainty Fitting version 2) method. The model performance has been assessed by three statistical indices, including coefficient corellation (R2), Nash-Sutcliffe efficient coefficience (NSE) and percentage Bias (PBIAS). The results showed that SWAT model was well calibrated for simulating the streamflow and water quality with the values of R2 greater than 0.5 except for the Attapeu and Kontum stations, and of PBIAS less than 10 % and 35 % for streamflow and water quality, respectively. The well-calibrated SWAT model can be applied in predicting the hydrology and water quality for other application. Furthermore, it is a tool supporting the policy makers to offer a suitable decisions regarding the sustainable river basin management.

scholarly journals A 16-week multicenter observational study of the efficiency and safety of rheumatoid arthritis therapy with methotrexate

2018 ◽  
Vol 12 (4) ◽  
pp. 106-111
Author(s):  
R. M. Balabanova
Keyword(s):  
Rheumatoid Arthritis ◽  
Combination Therapy ◽  
Fasting Glucose ◽  
Morning Stiffness ◽  
Hypolipidemic Effect ◽  
Multicenter Observational Study ◽  
High Doses ◽  
Positive Effect ◽  
Good Agreement

Objective: to evaluate the efficiency of combination therapy with methotrexate (MTX) and hydroxychloroquine (HC) in rheumatoid arthritis (RA) in real clinical practice.Patients and methods. The investigation enrolled 430 patients with documented RA who had been followed up for 16 weeks by rheumatologists in different regions of the country. Individual schedules were filled out for the patients, by adding demographic, clinical, and laboratory parameters that made it possible to assess the activity of the disease and to estimate the level of glucose, cholesterol, and low-density lipoproteins (LDL). The results of the investigation were evaluated at the inclusion of patients in it and then at 8 and 16 weeks. Taking into account the insufficient previous effect of MTX, the treatment was enhanced by HC.Results and discussion. By the end of the investigation, the combination therapy with MTX + HC led to significant decreases in the number of swollen and tender joints, the duration of morning stiffness, the severity of pain, and the integrated DAS28 index. The therapy showed a positive effect on the levels of fasting glucose, cholesterol, and LDL. The quality of life improved in patients by Visit 3. The results obtained are in good agreement with the data by foreign and Russian investigators on the greater efficiency of combination therapy with MTX + HC than that of MTX monotherapy and on the pleiotropic (hypolipidemic and hypolipidemic) effect of HC.Conclusion. It is concluded that in Russian practice when monotherapy with MTX shows an insufficient effect or its high doses cannot be administered to enhance the efficacy of RA therapy, it is possible to use a combination of MTX + HC, especially in older patients with comorbidity (hyperglycemia and hypercholesterolemia).

scholarly journals YIELD OF PERENNIAL GRASSES AND SOIL FERTILITY OF SOD-PODZOLIC SOIL IN CASE OF LONG-TERM APPLICATION OF MINERAL FERTILIZERS

2021 ◽  
Vol 250 ◽  
pp. 71-77
Author(s):  
A. Yu. Gavrilova ◽  
◽  
A. M. Konova ◽  
Keyword(s):  
Perennial Grasses ◽  
Mineral Fertilizers ◽  
Yield And Quality ◽  
Mobile Forms ◽  
Unit Dose ◽  
Phosphorus And Potassium ◽  
Higher Doses ◽  
Positive Effect

The article considers the effect of increasing doses and various combinations of mineral fertilizers applied to the cover crop on the yield and quality of a mixture of perennial grasses of two - years use, as well as the effect of fertilizers on the agrochemical parameters of sod-podzolic light loamy soil. The objects of the study were Stodolich meadow clover and Leningradskaya 204 meadow timothy grass. The studies were carried out in two crop rotations - with standard and reduced single doses of mineral fertilizers. The research results showed that in the years (VIII rotation) when the unit dose of fertilizers was increased to N20P20K25, the yield of perennial grasses was higher compared to the harvest in the VII rotation. The most appropriate dose in the VII rotation on perennial grasses of the 1st year was N30P30K45, on grasses of the 2nd year - doses of N30P30K45 and N40P40K60. In the VIII rotation, the highest yield of perennial grasses of the 1st year of use was obtained at a dose of N160P160K200 (8.4 t / ha), of grasses of the 2nd year of use at doses of N80P80K100 and N100P100K125 (6.5 t / ha). Positive effect of increasing doses of mineral fertilizers on the content of soil organic matter has been noted. On the contrary, the soil acidity increased from 4.7 to 4.3 units with an increase of mineral doses. Higher doses of fertilizers increased the content of mobile forms of phosphorus and potassium in the soil.

scholarly journals (48) Substrate Media and Fertilizer Source Affect Nitrogen and Phosphorus Levels in Leachate from Container-grown Shasta Daisy

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 1055B-1055
Author(s):  
Gladis Zinati
Keyword(s):  
Nitrate Nitrogen ◽  
Nitrogen Concentration ◽  
Dry Weight ◽  
Pine Bark ◽  
Nitrogen Release ◽  
Irrigation Regime ◽  
Nitrogen And Phosphorus ◽  
Recommended Level ◽  
Phosphorus Levels

Plugs of Leucanthemum × superbum `Becky' (Chrysanthemum `Becky', shasta daisy) were grown in #2 containers using pine bark–peat–sand or vermiculite–peat–sand (40:40:20 by volume). Containers were top dressed with either Osmocote Plus 15N–3.9P–9.9K (15–9–12) or Nutricote Plus (18N–2.6P–6.6K (18–6–8) at five rates (0, 0.5×, 1.0×, 1.5×, and 2.0×) to supply 3.9 g N per container at the recommended level (1.0×). Plants were irrigated twice a week using a cyclic irrigation regime consisting of two irrigation applications. Leachates from these containers were collected and evaluated for nitrate and orthophosphate concentrations. Irrespective of the substrate media, Osmocote Plus exhibited a higher rate of nitrogen release at the beginning of the season than Nutricote Plus. Nitrate nitrogen concentration was at least 2.5 times higher in leachates collected from media amended with Osmocote Plus than those with Nutricote Plus. Higher levels of nitrate were found in leachates collected from vermiculite-based media when compared to those from bark-based ones. Phosphate levels in leachates increased as rate of fertilizer increased and were higher in vermiculite-based media than those collected from bark-based media. Plants fertilized with Osmocote Plus were 1.7-fold greater in dry weight than plants fertilized with Nutricote Plus and were 1.2 times greater in vermiculite-based media than those in bark-based media.

scholarly journals Criteria for selection of probiotics for effective therapy of gut microbiota disorders

2018 ◽  
pp. 52-59
Author(s):  
A. A. Masharova ◽  
N. N. Danilevskaya
Keyword(s):  
Functional Activity ◽  
Correct Choice ◽  
Quantitative Composition ◽  
Gut Dysbiosis ◽  
Human Microbiota ◽  
Substantial Progress ◽  
Production Technologies ◽  
Pathogenic Agents ◽  
Current Guidelines ◽  
Positive Effect

Recently, the substantial progress has been made toward understanding the human microbiota as an ecosystem that functions as a separate organ in a macro-organism. More and more data on the microbiome as the aggregate of microorganism genes that reside on or within the human body appear. Deterioration of the environment, changes in food production technologies, widespread use of antibiotics result in serious human microbiota disorders, most often in the form of gut dysbiosis of varying severity. The investigation into the causes and the correct choice of a probiotic containing the identified microorganisms with the indication of genus, species, strain and their quantitative composition is the criterion for the success of dysbiosis therapy. The purpose of this article is to discuss the criteria for rational probiotic therapy and prevention of gut dysbiosis and associated diseases. It should be considered that the treatment of diseases accompanied by dysbiosis should be comprehensive and include the elimination of the cause of the disease, the correction of nutrition, the elimination of pathogenic agents and their toxins in the gastrointestinal tract, as well as the restoration of the microbiota composition and functional activity. Probiotics play an important role in restoring the composition and functional activity of microbiota. According to the current guidelines of the World Gastroenterological Organization (WGO), a certain quantity of bacteria (KOE of microorganisms) that is necessary to achieve a  positive effect is an important criterion for the efficacy of probiotic drugs. 

Skeleton weed (Chondrilla juncea) in the Victorian Mallee. 4. Effects of fallowing on wheat yields and weed populations

1971 ◽  
Vol 11 (50) ◽  
pp. 313 ◽  
Author(s):  
GJ Wells
Keyword(s):  
Soil Nitrogen ◽  
Nitrate Nitrogen ◽  
Wheat Yield ◽  
Individual Response ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Rainfall Distribution ◽  
Weed Density ◽  
Weed Growth ◽  
The Individual

Experiments to compare the duration of fallows and the substitution of a 2,4-D spray for some fallow cultivations for wheat production on skeleton weed land were conducted in the Victorian Mallee from 1962 to 1966. Generally winter fallows outyielded spring fallows, commenced only two months later, and these in turn gave higher yields than an autumn-cultivated treatment. Compared with autumn cultivation, winter fallowing reduced skeleton weed density by an average of 49 per cent. Substituting a 2,4-D spray for some Gltivations had little effect on wheat yield, but improved the control of skeleton weed. Grain yield was determined primarily by the level of nitrate nitrogen in the surface 15 cm of soil before sowing, and this effect was attributed to the low soil nitrogen status found in skeleton weed situations. Soil moisture was conserved only occasionally, owing to the difficulty of controlling weed growth during the summer coupled with the variable rainfall distribution in the Mallee. Although a nitrogen and phosphorus fertilizer interaction was significant at all sites, neither the individual response nor the interaction was affected by fallow treatment.

scholarly journals On the Ratio of Nitrogen to Phosphorus in the Sea

1937 ◽  
Vol 22 (1) ◽  
pp. 177-182 ◽  
Author(s):  
L. H. N. Cooper
Keyword(s):  
Nitrate Nitrogen ◽  
Marine Plankton ◽  
Nitrogen And Phosphorus ◽  
Broad Outline ◽  
Broad Generalization

Data are presented confirming the belief of Harvey and of Redfield that, in broad outline, the ratio of nitrate-nitrogen and of phosphate-phosphorus in the sea and of nitrogen and phosphorus in marine plankton lies within fairly narrow limits. The ratio approaches twenty to one when expressed in terms of milligram-atoms or nine to one by weight. There are however deviations from this broad generalization, but they do not provide a reason for discarding the concept but rather suggest close examination of the causes of the variations.

Sign in / Sign up

Export Citation Format

Share Document