REAKCIJA KUKURUZA NA GNOJIDBU FOSFOROM NA HIDROMORFNOME TLU BOSANSKE POSAVINE

In a four year experiment the effect of ameliorative phosphorus (P) fertilization (0, 750, 1250 and 1750 P2O5 kg ha-1 in the form of triple superphosphate containing 45 % P2O5) on maize grain yields and maize nutrient status (the ear-leaf at silking) was examined. P fertilization resulted mainly in considerable yield increase being 17%(4-year means 2005-2008: 4.30 and 5.02 t ha-1, for control and ameliorative P-fertilized treatments, respectively). Yield increases were achieved mainly by application of the first step of P in level of 750 kg P2O5 ha-1, while differences among P treatments were significant only in the second year of testing. P application had significantly influence on P, Mg, Mn and Zn status in maize leaves (0.36 and 0.56% P, 0.61 and 0.77% Mg, 53.3 and 69.2 mg Mn kg-1, 68.0 and 41.1 mg Zn kg-1, for control and 1750 kg P2O5 kg ha-1, respectively), while differences in leaf K, Ca, S Fe and Cu were non-significant (means 1.05% K, 0.83% Ca, 0.23% S, 148 mg Fe kg-1 and 11.1 mg Cu kg-1). Protein, starch and oil contents in maize grain (2-year means: 8.83%, 72.04% and 3.78%, respectively) were independent on P fertilization.Istraživan je utjecaj melioracijske gnojidbe fosforom (0, 750, 1250 i 1750 P2O5 kg ha-1 u obliku trostrukoga superfosfata 45% P2O5) na prinose i stanje ishrane kukuruza (list ispod klipa u svilanju). Gnojidba fosforom povećala je prinose kukuruza u prosjeku za 17% (4-g prosjek 2005.-2008.: 4.30 i 5.02 t ha-1, na kontroli i na tretmanima gnojidbe fosforom). Povećanje prinosa uslijedilo je već primjenom 750 kg P2O5 ha-1, a statistički značajne razlike između pojedinih stepenica dodanoga P bile su evidentne samo u 2006. godini. Melioracijska gnojidba fosforom značajno je utjecala na koncentracije P, Mg, Mn i Zn u listu (0,36 i 0,56% P; 0,61 i 0,77% Mg; 53,3 i 69,2 mg Mn kg-1; 68,0 i 41,1 mg Zn kg-1 za kontrolu, odnosno 1750 kg P2O5 kg ha-1), dok su koncentracije K, Ca, S, Fe i Cu bile slične (prosjeci 1,05% K, 0,83% Ca, 0,23% S, 148 mg Fe kg-1 i 11.1 mg Cu kg-1). Sadržaj bjelančevina, škroba i ulja u zrnu (2-god. prosjeci: 8,83%, 72,04%, odnosno 3,78%) bili su neovisni o gnojidbi fosforom

Milk yield and composition, body condition, rumen characteristics, and blood metabolites of dairy cows fed diet supplemented with palm oil

Background: An addition of rumen-protected fat to the diet of cows may limit negative energy balance and/or shorten its duration, leading to increased milk production with reduced risk of metabolic disorders in dairy cows. The aim of the study was to test the effect of rumen-inert fat supplement of palm oil on milk production, milk composition, rumen characteristics, and metabolic variables of early lactating dairy cows. For this purpose, 24 Holstein-Friesian cows were divided into two equal groups and fed a corn silage-based diet, without palm oil supplementation (control) or with 300 g palm oil (Palm Fat 99, Noack & Co. GmbH, Vienna, Austria) per cow for 8 weeks starting from day 30 after parturition. Milk, rumen, and blood samples were taken three times during experiment at days 30, 58, and 86 of lactation. Body condition scores of cows were determined in the same time periods. Milk yields were measured at the morning and evening milking (6(00) and 18(00)). Milk samples were analyzed for milk fat and milk protein content. Rumen content was tested for electrochemical reaction. A native slide was prepared for microscopical examination of the rumen protozoa motility that was numerically estimated. Protozoa were counted in whole rumen contents by light microscopy. Blood samples were tested for total protein, albumin, urea, tryglicerides, cholesterol, total bilirubin, beta-hydroxybutyrate, Ca, and P. Results: Compared with the control, palm oil supplementation resulted in an increase of the average milk yield and milk fat content. The loss in body condition was significantly lower in the group fed palm oil than in the control group. Rumen pH, total number, and motility of protozoa in the group fed palm oil were significantly higher than those in the control group. Palm oil supplementation did not influence blood metabolite concentrations except for urea and glucose which were significantly lower and Ca and cholesterol which were significantly higher in the palm oil-supplemented group. Conclusions: Our results indicate that supplementation with palm oil in weeks 4 to 12 postpartum spared postpartum body weight loss, increased milk yield and milk fat content, and had positive effects on rumen characteristics

Quantum reservoir neural network implementation on a Josephson mixer

Quantum reservoir computing is a promising approach to quantum neural networks capable of solving hard learning tasks on both classical and quantum input data. However, current approaches with qubits are limited by low connectivity. We propose an implementation for quantum reservoir that obtains a large number of densely connected neurons by using parametrically coupled quantum oscillators instead of physically coupled qubits. We analyse a specific hardware implementation based on superconducting circuits. Our results give the coupling and dissipation requirements in the system and show how they affect the performance of the quantum reservoir. Beyond quantum reservoir computation, the use of parametrically coupled bosonic modes holds promise for realizing large quantum neural network architectures

Wheat Yield and Weedness under Different Rate of Nitrogen Fertilization

In this study we tested yield and weediness in wheat cultivars Lazarica and Julija Mono grown under different regime of mineral nutrition. This investigation was conducted at the long term experiment on control variant (without fertilizers), second variant with nitrogen application (two sub variants with different rate of N) 2N1 (80 kg N ha-1) and 2N2 (120 kg N ha-1), third variant with NP fertilizer with two different rate of N application: 3N1 (80 kg N ha-1 + 100kg P ha-1) and 3N2 (120 kg N ha-1 + 100kg P ha-1) and fourth variant 4N1 (80 kg N ha-1 + 60kg P ha-1) and 4N2 (120 kg N ha-1 + 60kg P ha-1). Weediness varies in dependence of rate and variant of fertilization. The weed species Consolida regalis Gray, Convolvulus arvensis L., Polygonum aviculare L., Cirsium arvense L., Agropyrum repens L., Polygonum convolvulus L. was dominant on fertilized plots. The analyzed variability of grain yield depends of applied fertilizer variants. The lowest grain yield was found on control variant in both wheat cultivar Lazatica (1880kg ha-1), Julija Mono (1740kg ha-1) while the highest grain yield on variant 3N2 (120 kg N ha-1 + 100kg P ha-1) Lazarica (3724kg ha-1 Julija Mono (4990kg ha-1) and low weediness

Protection System of Persons in Migration during the State of Emergency due to Covid-19 in Serbia

Kao rezultat pandemije COVID-19, profesionalci koji rade u sistemu socijalne zaštite suočavali su se sa višestrukim izazovima – zbog zdravstvene krize bili su zabrinuti, ne samo za živote svojih korisnika, već i za svoju porodicu, prijatelje, ali i za sopstveni život. U cilju analize i razumevanja promena koje je epidemija COVID-19 donela u sistemu socijalne zaštite osoba u migracijama u Srbiji, sprovedeno je kvalitativno istraživanje sa profesionalcima u sistemu. Sprovedene su fokus grupe sa 13 profesionalaca i sedam intervjua sa ključnim informatorima. Rezultati istraživanja pokazuju da je pandemija COVID-19 osvetlila nedostatak kapaciteta prilagođavanja u sistemu zaštite i nespremnost za kriznu situaciju – počev od izazova u obezbeđivanju opreme za zdravstvenu zaštitu dosledno i podjednako do nedostatka stručnog nadzora.As a result of the COVID-19 pandemic, professionals working in the social protection system are confronted with multiple challenges – due to the health crisis, they are worried not only for the lives of their beneficiaries but for their own families, friends, including their own lives. In order to analyze and understand the changes that the COVID-19 pandemic brought to the social protection system of persons in migration in Serbia, qualitative research with professionals in the system has been conducted. Focus groups with 13 professionals and 7 interviews with key informants were conducted. Results have shown that the COVID-19 pandemic had lightened up the lack of adapting capacities in the social protection system and unpreparedness for situations of crisis – starting from challenges of consistent and equal provision of health protection equipment to lack of competent supervision

Altered apoptosis and biotransformation signaling in HCT-116 colorectal carcinoma cells induced by Teucrium chamaedrys L. extract

The aim of this study was an investigation of pro-apoptotic activity of methanol extract from T. chamaedrys, a more detailed determination of the signal molecules activated in the process of apoptosis, and effects on mRNA expression of enzymes involved in biotransformation (CYP1A1 and GSTP1) and membrane transporter, MRP-2 in HCT-116 colorectal carcinoma cells. The results show pronounced proapoptotic activity of T. chamaedrys extract, due to activation of both extrinsic and intrinsic pathways. The death receptor associated signaling pathway was activated in HCT-116 following treatment by T. chamaedrys, via increased Fas receptor expression and activity of caspase 8. Activation of caspase 9 suggests that mitochondrial signalling also has an impact. The extract reduced mRNA expression of GSTP1 and MRP-2 genes, as one of the causes of multi drug resistance in cancer cells. Observed results offer the possibility for the use of T. chamaedrys extract in the context of cancer prevention and therapy.Publishe

Interkulturna kompetencija u nastavi stranog jezika struke

The paper analyses the concept of intercultural competence and its presence within teaching foreign languages for specific purposes in Serbia. The aim of this study was to investigate the extent of the presence of intercultural competence within teaching foreign languages for specific purposes at non-philological faculties as well as the existence/nonexistence of awareness about this competence and attitudes towards the importance of intercultural competence. In addition to the theoretical analysis of the research problem, this paper presents the results of a survey conducted among lecturers of foreign languages for specific purposes at non-philological faculties of the University of Belgrade as well as the results of a survey carried out among students of the Faculty of Agriculture, University of Belgrade. The survey results indicate that there is a developed awareness and a positive attitude towards intercultural competence. The results show that the importance of intercultural competence is recognised by both lecturers and students. It can therefore be concluded that the development of intercultural competence should occupy an important place in the curriculum of foreign languages for specific purposes at non-philological faculties.Rad analizira koncept interkulturne kompetencije i njenu zastupljenost u nastavi stranog jezika struke u Srbiji. Cilj istraživanja bio je da se ispita stepen zastupljenosti interkulturne kompetencije u nastavi stranog jezika struke na nefilološkim fakultetima, kao i da li i u kojoj meri postoji svest o interkulturnoj kompetenciji i stav prema važnosti iste. Pored teorijske analize problema istraživanja, rad sadrži i rezultate istraživanja sprovedenog među predavačima stranih jezika struke na nefilološkim fakultetima Univerziteta u Beogradu, kao i rezultate istraživanja sprovedenog među studentima Poljoprivrednog fakulteta Univerziteta u Beogradu. Rezultati istraživanja ukazuju na činjenicu da postoji prilično razvijena svest i pozitivan stav prema interkulturnoj kompetenciji. Dobijeni rezultati pokazuju da je značaj interkulturalne kompetencije prepoznat kako kod predavača, tako i kod studenata. Stoga se može zaključiti da bi razvijanje interkulturne kompetencije trebalo da zauzima važno mesto u kurikulumu stranih jezika struke na nefilološkim fakultetima