Jaunasis mokslininkas 2021: Studentų mokslinė konferencija
Item type:Publication, [Interaction of plant nutrients in spring wheat]research article[2021][P1f][A001]Jaunasis mokslininkas : studentų mokslinės konferencijos pranešimų rinkinys, 2021 m. balandžio 22 d. / Vytauto Didžiojo universiteto Žemės ūkio akademija. Agronomijos fakultetas, p. 44-46The field experiment was conducted in 2018 at Agrocentras agriculture company in Marijampole. The main aim of this study was to establish how different macronutrients fertilizer interact with each other and to evaluate the influence of its combinations with secondary elements in the leaf of spring wheat. Spring wheat rape is grown in moderate loam, medium nitrogen and humus. It was found that the highest nitrogen, phosphorus, potassium and sulfur content of spring wheat accumulated plants fertilized with nitrogen, phosphorus, potassium, sulfur (NPK+S) and with micronutrients Mn, Zn, Cu (foliar application).
13 3 Item type:Publication, [Influence of biological preparations and potassium leaf fertilizers on maize yield]research article[2021][P1f][A001]Jaunasis mokslininkas : studentų mokslinės konferencijos pranešimų rinkinys, 2021 m. balandžio 22 d. / Vytauto Didžiojo universiteto Žemės ūkio akademija. Agronomijos fakultetas, p. 59-61The field experiment was conducted in 2020. Vytautas Magnus University Agricultural Academy Test Station. Field soil is a deeper glycine-saturated loam (PLb-g4 Endohipogleyic-Eutric Planasol - Ple-gln-w, according to FAO). Biological preparations and potassium fertilizers and their combinations were used in field trials of maize. During the experiment, corn grain yield, grain yield of 1 plant, 1000 grain mass and grain content in the cob were determined. Summarizing the results of the experiment, it was found that the highest grain yield (10.05 t ha-1 and 9.97 t ha-1) was when fertilizing potassium leaf fertilizers with the combination of K-Leaf and K-Leaf and Terra Sorb Complex, respectively. The highest amount of grain in the bulb (485 pcs.) Was obtained for the crop using complex preparations of K-Leaf and Terra Sorb, but the changes in the amount of grain in the bulb were insignificant. Changes in the weight of 1000 grains for all variants compared to the control were significant. The studied preparations significantly increased the grain productivity of maize 1 plant. This increase was more due to an increase in the weight of 1000 grains than to a change in the amount of grain in the cob.
2 Item type:Publication, [Influence of black cumin seed (Nigella sativa L.) additive on nutritional value and quality of wheat bread]research article[2021][P1f][A001]Jaunasis mokslininkas : studentų mokslinės konferencijos pranešimų rinkinys, 2021 m. balandžio 22 d. / Vytauto Didžiojo universiteto Žemės ūkio akademija. Agronomijos fakultetas, p. 78-81The main objective was to determine the influence of black cumin seed additive on nutritional value and quality of wheat bread. The research was done at Vytautas Magnus University Agriculture Academy in 2020. Raw materials used for the investigation: whole grain wheat flour, black cumin seeds, dry yeast, salt, sugar and water. Was added 5%, 7%, 10% black cumin seeds additives. In bread, standard methods have been established: fat, protein, fiber and moisture contents. The addition of 10% black cumin seeds during bread production significantly increased the amount of fat (8.68%), protein (15.41%) and fiber (5.42%) in the bread compared to the control variant where the additive was not used. The highest moisture content was established 51.45% in the control variant, at lowest 46.33% in bread with 10% additive of black cumin seeds. Our study showed that black cumin seeds additive significantly reduced the moisture content in the bread.
7 Item type:Publication, [Influence of sowing time and seed rate on winter wheat yield and grain quality]research article[2021][P1f][A001]Jaunasis mokslininkas : studentų mokslinės konferencijos pranešimų rinkinys, 2021 m. balandžio 22 d. / Vytauto Didžiojo universiteto Žemės ūkio akademija. Agronomijos fakultetas, p. 10-13The main key objective of the research is to compare the influence of sowing time and seed rate on winter wheat (Triticum aestivum L.) yield and grain quality. The experiment was performed in 2019–2020 at the test station of the Agricultural Academy of Vytautas Magnus University. The relief is a low undulating plain. The influence of sowing time on the productivity of winter wheat sown at different seed rate was investigated in a two–factor experiment. The granulometric composition was dominated by medium loam. The arable layer of the soil before the experiment was set up with neutral reactions (pH–7,0), medium humus content (2,05 %), high phosphorus content (241 mg kg-1 ) and medium potassium content (186 mg kg-1 ). Winter wheat is grown according to the technology applied at VMU Test Station. Pre-sowing - spring wheat. The total area of the field is 40 m2 , the accounting area is 20 m2 . The winter wheat variety ‘Skagen’ was studied in the experiment. The experiment was performed in four replicates. Repetitions are arranged randomized. Before sowing winter wheat fertilized N16P16K16 200 kg ha-1 . In the spring, when the vegetation resumes (March 19), it is fertilized with ammonium nitrate (N68). Later, ammonium nitrate was fertilized on April 8. – N61 and 29 April. – N41. Agricultural Academy of Vytautas Magnus University test station soil – carbonate deeper gleyic leachate (IDg4-k) (Calc (ar) i-Endohypogleyic Luvisol). The highest yields of winter wheat (11.1–10.5 t ha-1 ) were found after sowing 4.11, and on 26, sowing 5–3 million ha-1 seed rate. The lowest yields (9.7–8.2 t ha-1 ) were distinguished by the latest sowing (October 7) and (September 19) sow 4–2 million ha-1 rate sown wheat (9.6–9.8 t ha-1 ).[...]
16 Item type:Publication, [Influence of biological preparations and catch crop on the prevalence of septorosis]research article[2021][P1f][A001]Jaunasis mokslininkas : studentų mokslinės konferencijos pranešimų rinkinys, 2021 m. balandžio 22 d. / Vytauto Didžiojo universiteto Žemės ūkio akademija. Agronomijos fakultetas, p. 17-21The experiment has started in 2017 and will continue until 2021. The experiment is performed at the Experimental Station of the Vytautas Magnus University Agriculture Academy. The article presents the results of research conducted in 2020. In 2018 spring wheat was grown at the site of the experiment. The granulometric composition of the soil is light loam on medium and heavy loam. A two-factor field experiment was performed. The spring wheat variety ‘Wicki’ was selected for the study. The test fields are divided into equal 60 m2 fields. 4 randomized iterations were applied. The field tests were performed according to the following scheme: Factor A - tillage technology: 1. Zero tillage + white mustard catch crop; 2. Bearish tillage. Factor B - soil quality improvement and risk reduction measures: N8 - compensatory nitrogen 8 kg t-1 straw, without biological preparations; F - Fosfix 1l ha-1; R - Ruinex 1l ha-1; P - Penergetic k 0.2 l ha-1; A - Azofix 1 l ha-1; R + P - Ruinex 1l ha-1 + Penergetic k 0.2 l ha-1; R + A - Ruinex 1 l ha-1 + Azofix 0.5 l ha-1; P + A - Penergetic k 0.2 l ha-1 + Azofix 1 l ha-1; R + P + A - Ruinex 1l ha-1 + Penergetic k 0.2 l ha-1 + Azofix 0.5 l ha-1. In the flag leaf stage (BBCH 38–40), the average number of leaves affected by septorosis in bearish tillage technology was 0.82% more than zero tillage. With the application of zero tillage technology together with the catch crop, the majority of septorosis-damaged leaves were found in variant with the preparation of Azofix 1l ha-1, and in the bearish tillage technology Ruinex 1l ha-1 + Azofix 0.5 l ha-1. The intensity of the disease was low (LPI 0.3-1.03), no significant effect of the studied measures was found.[...]
5 Item type:Publication, [Effect of biological seed treatment products on development and protection of root rot of winter wheat]research article[2021][P1f][A001]Jaunasis mokslininkas : studentų mokslinės konferencijos pranešimų rinkinys, 2021 m. balandžio 22 d. / Vytauto Didžiojo universiteto Žemės ūkio akademija. Agronomijos fakultetas, p. 47-50Two biological seed treatment products Biomas Protect (Bacillus amyloliquefaciens) and Biomas Universal (Bacillus subtilis) were tested in field and controlled environment experiments on winter wheat (Triticum aestivum). The aim of this study was to evaluate effect on plant development and control against root rot in comparison to chemical seed treatment fungicide alone and in tank mix with bioproducts. Results of this study suggested that biological products had some positive effect on germination energy and germination in controlled environment, no significant effect on plant development was recorded regarding Biomas products. Biomas Protect (B. amyloliquefaciens) had insignificant efficacy against root rot in this study. In contrast to that, Biomas Universal (B. subtillis) was effective against root rot in field experiment. Biological products used in tank mix with chemical seed treatment fungicide (STF) had no significant difference compared to STF used alone.
7 Item type:Publication, [Color and anthocyanin content of dried blueberry juice powder]research article[2021][P1f][A001]Jaunasis mokslininkas : studentų mokslinės konferencijos pranešimų rinkinys, 2021 m. balandžio 22 d. / Vytauto Didžiojo universiteto Žemės ūkio akademija. Agronomijos fakultetas, p. 70-74The research was carried out in 2020 at Vytautas Magnus University Agriculture Academy, Open Access Joint Research Center for Agriculture and Forestry, in the Laboratory of Raw Plant Materials Quality. Corn maltodextrin (14–17 eqv.) and chicory inulin were used for the experiment. The blueberry juice was mixed with 10, 20 and 30% of maltodextrin, also with 10, 20 and 30% of maltodextrin and inulin at the ratio 1:1. The same additives were added to the blueberry juice before dissolving them in distilled water at the ratio 1:2 (The additive:distilled water). The juice with additives was dried with the spray dryer. Juice drying parameters: liquid flow – 436.5 ml h-1 or 7.275 ml min-1 (± 10%); air flow – 87.6 m3 h-1. Inlet and outlet temperature 140°C / 70°C. Drying of the blueberry juice with the addition of 10% maltodextrin and inulin (1:1) was unsuccessful. The color of dried blueberry juice powder was measured using ColorFlex spectrophotometer. L * – from white to black, a * – from green to red, b * – from blue to yellow. Other color parameters were also calculated: The total color difference ΔE, chroma (C *), hue angle (h°), browning index (BI) (Lee, Coates, 1999; Lee, Castle, 2001; Correia et al., 2017; Luchese et al., 2017). The total anthocyanin content was determined by pH differential spectroscopic method (Gollucke, 2010). The darkest blueberry juice powder was determined with 10 % maltodextrin (25.07 NBS units), and the lightest with 30% dissolved maltodextrin additive (L * – 48.92 NBS units). As the amount of additive increases, the powder lightens. The additive and dissolution in water resulted in a lighter color of the powder. The highest anthocyanin content was determined in a powder with 10% maltodextrin (328.03 mg per 100 g-1). Higher additive concentrations and the dissolution in water reduced the amount of anthocyanins content in the powder.[...]
3 Item type:Publication, [Improving the quality of wheat bread crispers with different additives]research article[2021][P1f][A001]Jaunasis mokslininkas : studentų mokslinės konferencijos pranešimų rinkinys, 2021 m. balandžio 22 d. / Vytauto Didžiojo universiteto Žemės ūkio akademija. Agronomijos fakultetas, p. 99-102The aim of the study – to evaluate the oil absorption content of wheat bread chips with different fiber additives. The research was performed in 2020 in the self-monitoring research laboratory of the company Traškuva ir Ko. Baked wheat bread control samples, as well as three test samples with additives: wheat bread with bamboo fiber (10%, 30 μm fraction), wheat bread with wheat fiber (10%, 30 μm fraction) and wheat bread with apple fiber (10%, 30 μm fractions). High-stability rapeseed oil produced in Germany by Cargill GmbH, which has a shelf life until 2022, is used for cooking chips. Products baking temperature: 170 °C, 175 °C, 180 °C, cooking time 25 s. The experiment found that the lowest fat content was in wheat bread chips with bamboo fibers when fried in oil at 180 °C for 25 s. Wheat and apple fiber supplements did not have a significant effect on the decrease in fat absorption. The cooking temperature also affected the fat content of the product: the lower the cooking temperature, the higher the fat content of the chips. When baking bread chips at 180 °C for 25 seconds, the fat absorption was reduced by 4.9% and 6.1% compared to baked at 170 °C and 175 °C. The cooking temperature is a significant factor in the absorbency of the oil. The obtained results coincided with the data of the research conducted by the researchers: when baking at lower temperatures for a longer time, the oil is absorbed faster into the deeper layers, because the evaporation of moisture and the penetration of the oil are not synchronous phenomena. Substantially the lowest fat content of 21.9% was found in a sample with bamboo fibers with a moisture content of 33% in the semi-finished product.
12 Item type:Publication, [The influence of biological preparations and weed control methods on the soil biological properties in the winter oilseed rape agrocenosis]research article[2021][P1f][A001]Jaunasis mokslininkas : studentų mokslinės konferencijos pranešimų rinkinys, 2021 m. balandžio 22 d. / Vytauto Didžiojo universiteto Žemės ūkio akademija. Agronomijos fakultetas, p. 31-35The field experiment was conducted at the Experimental Station of Vytautas Magnus University on the soil type Calc(ar)i-Endohypogleyic Luvisol in 2016 and 2017. The aim of investigations was to determine the influence of biological preparations and different weed control methods on the soil biological properties in the agrocenosis of winter oilseed rape. The highest earthworms number and mass was found in crop where thermal weed control and biological preparations were used. The using of biological preparations significantly increased 2.5 times earthworms number in the soil, where smothering system was used. Application of the thermal weed control method and using of biological preparations significantly 2.0 times stimulated the activity of enzyme urease in the soil, compared with plots where mechanical weed control method and smothering was used. The use of biological preparations, as compared to their non-use, significantly 2.0 times inhibited the activity of enzyme urease in the soil, where mechanical weed control method was used. The highest activity of enzyme saccharase was observed in the soil, where thermal weed control method and biological preparations were used. The use of biological preparations, as compared to their non-use, significantly 24.1% stimulated the activity of enzyme saccharase in the plots where thermal weed control method was used, significantly 14.5% inhibited the activity of enzyme saccharase in the soil, where smothering was used.
13 Item type:Publication, [Extraction of phenolic compounds of Urtica dioica L.]research article[2021][P1f][A001]Jaunasis mokslininkas : studentų mokslinės konferencijos pranešimų rinkinys, 2021 m. balandžio 22 d. / Vytauto Didžiojo universiteto Žemės ūkio akademija. Agronomijos fakultetas, p. 103-106The research was carried out in 2020 at Vytautas Magnus University Agriculture Academy, Open Access Joint Research Center for Agriculture and Forestry, in the Laboratory of Raw Plant Materials Quality. The aim of the research is to determinate the influence of solvents of different polarity on the content of phenolic compounds in leaves and root extracts of stinging nettle (Urtica dioica L.). To evaluate the extraction efficiency of solvents of different polarity, the extracts were prepared using the maceration method. Briefly, 5 g of dried nettle leaves and roots were weighed into individual dark glass vials and poured with 150 mL of solvent. To prepare the extracts was using water and different concentrations of ethanol (50, 70, 96%) and methanol (50, 70, 96%). Maceration was performed in sealed dark glass vials at 4°C in the dark for 72 hours. The total phenolic content, in the extracts of nettle leaves and roots, was determined spectrophotometrically according to the Folin–Ciocalteu method (using gallic acid as a standard). Total flavonoids in the extracts of nettle leaves and roots were determined according to the aluminium chloride colorimetric method using quercetin as a standard. The data was evaluated by the method of variance analysis (ANOVA) by the programme STATISTICA. The studies revealed high levels of flavonoids and phenolic compounds in the leaves extract with 96% methanol. The study showed that nettle leaves contain on average 5.2 times more phenolic compounds than roots. In the roots, extraction of phenolic compounds was most efficient using 50% methanol, the significant maximum content of flavonoids was determined using 50% ethanol as a solvent.
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