<abstract xmlns="http://www.w3.org/1999/xhtml">The experiment was conducted to analyse the effect of fermented acid whey permeate on milk yield and composition in the lactating cows. Propionic acid bacteria and their metabolites have been used in the lactating cows feeding over decades, primarily to improve growth performance, feed conversation and milk production efficiency. Two groups of the lactating cows were arranged in the study: control group (n=50) and experimental group (n=50). Experimental group’s animals received 0.5 L of fermented whey permeate daily. Acid whey permeate was inoculated with the freeze-dried PS-4 (<italic>Propionibacterium freudenreichii subsp. shermanii</italic>, Chr.Hansen, Denmark) starter and fermented anaerobically for 48 hours at 20±2 oC. Fat, protein, lactose and total solids concentration in acid whey permeate and fermented acid whey permeate was analysed by the standard methods, but propionic acid was detected by HPLC. Milk composition and quality indices were determined at the beginning of the study and each month during 6 months period. At the end of the study the feeding of fermented acid whey permeate was stopped, but milk composition and quality data were monitored additionally after one month. Milk fat, protein, lactose, total solids, urea concentration and somatic cell count were analysed by a near infrared spectroscopy.The variability in milk composition and quality data across trial was greater in the experiment group than in the control. Milk fat and somatic cell count were significantly different (p&lt;0.05) than other studied parameters in the experimental group cows’ milk. Milk yield and lactose concentration were tended to increase during feeding of fermented acid whey permeate in the lactating cows without significant differences between control and experimental groups. Fermented acid whey permeate as feed supplement improves energy metabolism for dairy cows which results in the higher milk yield and fat concentration.</abstract>

Latvia University of Life Sciences and Technologies

The Novel Solution for Acid Whey Permeate Application in Animal Feeding

<abstract xmlns="http://www.w3.org/1999/xhtml">The work presents foundations of the dynamics of the flat-parallel movement of a bridge agricultural unit in a horizontal with the kinematic method of its control (turning the wheels) by changing the position of one of its parts relative to the other. The analysis of assessment of the degree of impact of the scheme and parameters of the investigated agricultural tool upon its controllability and stability of movement is based on the amplitude and phase frequency characteristics. The mathematical models of the movement of the bridge agricultural unit are presented in a differential and an operator form of recording. Based on mathematical models, the calculated amplitude and phase frequency characteristics of the dynamic control system of the control impact, presented as the angular displacement of its half-frames ψ, are constructed for various parameters and operating modes. The constructed mathematical models, amplitude and phase frequency characteristics make it possible to assess the impact of the control parameter of the bridge agricultural unit, as well as its design and other parameters upon the controllability of the movement.</abstract>

National University of Life and Environmental Sciences of Ukraine

Dmytro Motornyi Tavria State Agrotechnological University

Simulation of the Flat-parallel Movement of a Bridge Agricultural Unit with an Articulated Frame

<abstract xmlns="http://www.w3.org/1999/xhtml">The research paper presents the results of research on the situation and trends in the age structure of farm owners or managers in Latvia. The growing world population and the challenges caused by climate change make farmers reconsider their traditional farming practices. Therefore, scientists believe that the aging of farmers is a major obstacle to the sustainable development of agriculture and rural areas, as evidenced by the age structure of European Union (EU) farmers and other agricultural workers. Generation renewal is crucial for sustainable land management and food production. In 2018, according to statistical data, the share of agriculture, forestry and fisheries in total gross value added in Latvia was only 3.8%. However, these sectors were the main job creators and drivers of economic development in rural areas. Therefore, <italic>the aim of the present research is</italic> to assess trends in the age structure of farm managers and owners and the policy instruments applied in Latvia. The results of the research show that despite the policy instruments implemented in Latvia after its accession to the EU to support young farmers and promote early retirement of farm owners, the aging process of farm owners and managers occurs relatively fast. The median age of farm owners and managers in Latvia has increased from 53 years in 2009 to 57 years in 2019, which could hinder the development of the agricultural industry and prevent the new challenge of growing global food demand and the negative impacts of climate change from being tackled.</abstract>

Age Structure of Farm Owners and Managers: Problems and the Solutions Thereto in Latvia

<abstract xmlns="http://www.w3.org/1999/xhtml">There is a strong correlation between diet and mental health, and malnutrition can contribute to the development of various psycho-neurological diseases. Fatty acid profile plays an important role in the treatment of psycho-neurological diseases; therefore, the aim of the current study was to evaluate fatty acid profile in the diet of patients in three Latvian psycho-neurological hospitals. Latvian psycho-neurological hospitals submitted a detailed one-week menu. The information in the menus was processed using the <italic>Fineli</italic> program. Each menu identified the composition of fatty acids.The average fat concentration in different hospital menus ranged from 74.8 g to 96.1 g per day, where the concentration of saturated fatty acids ranged from 37.5 g to 47.7 g per day and the unsaturated fat concentration ranged from 35.9 g to 47 g per day. The n-3 PUFA content was consistent with the recommendations of a healthy individual, but it did not meet the needs of patients in a psycho-neurological hospital. The total eicosapentaenoic acid and docosahexaenoic acid concentration in the hospital menus ranged from 0.03 to 0.13 g, which was significantly lower than recommended, whereas LA and ALA concentration in hospital menus is close to optimal. The trans-fatty acids concentration in hospital menus did not exceed 2.5 g per day, with the exception of one day in hospital No. 2.The impact of diet on the treatment of psycho-neurological diseases in Latvian psycho-neurological hospitals has not been sufficiently assessed.</abstract>

The Evaluation of Fatty Acid Profile in the Diet of Patients in Psycho-neurological Hospitals

<abstract xmlns="http://www.w3.org/1999/xhtml">An urgent problem is drying and processing of the wet dispersed waste, obtained in the production of food products, which can then be efficiently used as a fertiliser, for feeding livestock or as biofuel. A new design of a vibrating fluidised bed dryer has been developed, which, with low energy consumption, provides a pre-set productivity and the required final moisture content. The process of vertical oscillations of the body of a vibration dryer, together with the food waste contained in it, is analysed analytically, the necessary equivalent scheme is built, on the basis of which differential equations of the vertical oscillations of the body are compiled, their analytical solutions are obtained, and a numerical calculation is performed on a PC using the developed program. Rational parameters of the vibration dryer, providing vibroboiling of the mass of the food waste, have been determined: the body mass m = 250 ... 510 kg; the debalance mass md<italic>=</italic> 10… 15 kg; the number of revolutions of the debalance electric motor nd<italic>= 1950 ... 2650 rpm ∙ min</italic>∙1; maximum stiffness of the support springs Cp<italic>= 8</italic>∙105 N∙m–1; the diameter of the centre of mass of the debalances dd<italic>= 0.01 m. In addition, as a result of the</italic> thermophysical theoretical and experimental studies of the vibration drying process, the following optimal design and technological parameters of the vibration dryer were obtained: the heat transfer area <italic>St.p.n= 4.15 m</italic>2; the radius of the heating pipe <italic>rt= 0.1 m</italic>; the length of the heating pipe <italic>lt = 3 m</italic>; the number of heating pipes <italic>nt= 50</italic>; the heat transfer coefficient <italic>Kp= 2500</italic>; the final temperature of the dried waste to2<italic>= 100 ºС</italic>.</abstract>

National University of Life and Environmental Sciences of

Vinnytsia National Agrarian University of

Theoretical Studies of the Vibration Process of the Dryer for Waste of Food

<abstract xmlns="http://www.w3.org/1999/xhtml">Consumers are increasingly consuming sprouted seeds due to their low calories content, nutritional value, as well as beneficial effects on human health. Sprouts contain many bioactive compounds such as minerals, fibre, vitamin C, carotenoids and phenolic compounds. The aim of this study was to determine the effects of darkness, light and time total phenolic content and scavenging activity in alfalfa (Medicago sativa), radish (Raphanus sativus), broccoli (Brassica oleracea) and hemp (Cannabis sativa) seeds during germination. The seeds were washed, soaked in water by ratio of 2:1 (water : seeds) for 12±1 h and then germinated in light and dark conditions at a temperature of 22±2 °C and a relative humidity of 85±2% for different times (12, 24, 36 and 48 hours) in a climatic chamber ICH110 (Memmert, Germany). The quality changes of germinated seeds are determined by phenol content and scavenging activity. Un-germinated seeds were used as a control. The results of current studies show that after germination the highest increase in total phenols was in radish, broccoli and alfalfa seeds. The scavenging activity (SA) was higher after 48 hours of germination in all seed types compared to un-germinated seeds both in darkness and in light. This study shows that sprouted edible seeds are an excellent source of total phenolic compounds and has a high scavenging activity.</abstract>

Influence of Germination Conditions and Parameters on the Content of Total Phenolic Compounds and Scavenging Activity in Germinated Seeds

<abstract xmlns="http://www.w3.org/1999/xhtml">Remote and automatic monitoring of two Apis Cerana bee colonies was conducted in Indonesia to demonstrate precision beekeeping approach in that region. Successful implementation of the precision beekeeping system includes development of the bee colony monitoring hardware and software for data collection, analysis and visualisation. This paper focuses on development and installation of such systems at the private apiary in Indonesia. For bee colony monitoring at the apiary a developed monitoring unit was used, which is based on ESP microchip, and for the data storage SAMS data warehouse was used. The monitoring results showed that the choice of the location of the temperature sensor is important, as the temperature at the hive sides changes synchronously with the outside temperature. Also, feedback from the beekeeper is collected to further improve the system and monitoring process. This research is conducted within the SAMS – Smart Apiculture Management Services project, which is funded by the European Union within the H2020-ICT-39-2016-2017 call and with close collaboration with the local private beekeeper. To find out more, visit the project website <ext-link ext-link-type="uri" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://sams-project.eu/">https://sams-project.eu/</ext-link>.</abstract>

Department of Computer Systems, Faculty of Information Technologies

Temperature and Weight Monitoring of the Apis Cerana Bee Colony Indonesia

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Rural Sustainability Research

 The scientific journal Rural Sustainable Research (ONLINE ISSN 2256-0939) of Latvia University of Life Sciences and Technologies is a peer-reviewed journal intended for the publication of wide-spectrum original research articles and reviews on topical problems of sustainable rural development. The subject matter of the journal reflects the wide range of research covering the following topics:    Sustainable Crop Production Systems;  Soil and Plant Sciences  Plant Breeding and Genetics  Plant Pathology and Protection  Forestry  Animal and Veterinary Sciences  Food Processing  Agricultural Machinery and Husbandry  Biomass and Renewable Energy  Energetic and Automation  Engineering Technologies  Material Sciences  Transport, Motor Vehicles and Fuels  Engineering Economics and Education  Sustainable Social Development  Economics, Management and Marketing  Information Technologies    All manuscripts are screened on their linguistic quality. The scientific journal Rural Sustainable Research is open access, double-blind peer-reviewed. It does not have article processing charges (APCs) nor article submission charges.  Scientific journal Rural Sustainable Research copyrights belong to Latvia University of Life Sciences and Technologies.  Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 