Bovine colostrum is a mammary gland secret which, due to its high immunoglobulin concentration, is necessary for the transfer of passive immunity to the calf, preventing diseases caused by microbial infections in the newborn ruminants. Colostrum, however, may contain pathogens and can be an infection transmitter, affecting morbidity and mortality rates of calves in the farms. Total plate count and immunoglobulin concentration are two main factors affecting colostrum quality, therefore the aim of the study was to analyse Latvian dairy herd colostrum quality. Colostrum was collected from Holstein Black cows within the first six hours after calving, lactation period of animals ranged from 1st to 4th lactation. Colostrum samples (n=51, 50 mL) were collected from December 2018 to February 2019. Immunoglobulin concentration (n=51) was defined by colostrometer (COLOSTROMETERtm Biogenics, USA), total solids content by optical refractometer (Model BX, UK). Staphylococcus spp. colony–forming unit (CFU) (LVS EN ISO 6888-1+A1:2007), the presence of Listeria spp. (LVS EN ISO 11290-1+A1:2007) and Salmonella spp. (LVS EN ISO 6579-1:2017) were examined in the colostrum samples (n=20). Despite the high immunoglobulin concentration in the analysed samples, our research findings demonstrate suboptimal colostrum quality received by calves. That indicates the necessity for regular colostrum quality control and better management practise providing on the farm.

In recent years, the effective immunostimulating properties of β-glucans have been widely proven not only in mammals, but also in aquatic animals. The aim of this study was to determine the effect of dietary β-glucan supplements on the percentage of individual types of leukocytes and the haematocrit of the sea trout (Salmo trutta L.). Investigations were performed at the state fish farm ‘Tome’, hatchery ‘Pelči’ of the Institute of Food Safety, Animal Health and Environment ‘BIOR’, during a six month period (September 2018 – February 2019). On the basis of feeding with immunostimulant diets, a total of 15 000 sea trout were assigned into five groups. For blood collection healthy fish were randomly selected once a month, five 5 individuals from each group. Blood smears were made to determine the leukocyte differential count. Sampling was done once a month (September 2018 – January 2019) (n=125). Haematocrit was determined by the standard microhaematocrit method. Sampling was done once a month (January 2019 – February 2019) (n=50). We concluded that the dietary β-glucan supplements can improve the haematocrit level and effect the percentage of individual types of leukocytes of the sea trout, stimulation of the preparation for parr-smolt transformation.

Parafasciolopsosis is a parasitological disease which is caused by the liver fluke Parafasciolopsis fasciolaemorpha. This parasite which belongs to herbivores often causes invasion in elks (Alces alces). The aim of our study was to diagnose the parasite and investigate what kind of histopathological changes it caused in the liver tissue. The study took place in Latvia University of Life Sciences and Technologies, Faculty of Veterinary Medicine, Laboratory of Comparative Pathology and Laboratory of Parasitology. During the study from 2017 to 2018 we collected liver samples and faeces from 46 felled elks of different age and gender, from all over Latvia. Ten grams of faeces were examined for trematode eggs by sedimentation method and a section of liver was examined for the presence of flukes and the histological structure of the liver. In this study Parafasciolopsis fasciolaemorpha were found in 11 samples of liver from 46 elks, with invasion extensity of 24%. The histopathological examination of the liver samples revealed fibrosis, proliferation of bile ducts, pericholangitis, calcerous deposits in bile ducts and other notable histological changes in the liver tissue that can cause hepatic trematodes.

New types of polymer fertilizer series ‘Vitanoll’ are used in adaptive-varietal agro technology in the cultivation of seed potatoes. The experiments were conducted on sod-podzolic soils, typical of the North-West region of the Russian Federation. The aim of the research was to study the effect of new polymer fertilizers on potato yield. Research tasks included assessing the effect of various polymer fertilizers (Polymer-N, Polymer-P, Polymer-K.), as well as the effect of Polymer-N on different potato varieties. Based on the studies conducted, the most responsive potato varieties to polymeric fertilizers with nitrogen were identified. They turned out to be Salin (increase of 7.1 t haE−1) and Mocart (increase of 4.1 t haE−1). Evaluation of the influence of different types of polymer fertilizers revealed that the most effective are polymer fertilizers with potassium.

The aim of the work was to study accessions of Dactylis glomerata L. of different origin for breeding in the Leningrad region. The work was carried out at the Leningrad Agricultural Research Institute. The study involved 15 accessions. The nursery was founded in 2016 and included two replications for green yield and two – for seed production. Cutting and sampling for biochemical studies were conducted in May-June 2018, seeds were collected in July. The amount of ascorbic acid, carotenoids and chlorophylls and crude protein were determined. Statistical analysis included the calculation of the parameters of variation, ANOVA and correlation analysis. Three groups were identified by the degree of ripeness: a small group of early maturing – 31 days, a group of late maturing (single accession from Karelia) – 51 days, a large group of middle maturing – 34–37 days. For the late maturing accession the mechanism of regulation of the beginning of heading is due to the sensitivity to photoperiod. The adaptive potential of widely zoned varieties is wider than for localized. Their productivity is higher. The content of pigments in the green mass is closely correlated. The system of pigments in the complex of characters is separate, but is positively associated with the seed productivity and negatively – with the content of ascorbic acid. The seed productivity of the accessions is related to the total pigment content and power of the generative shoots (length and mass).

The article deals with the issue of rural population decline in Poland in 1995−2017. The aim of the study was to present the phenomenon of depopulation involving a decrease in the number of people living in rural areas in Poland at the local level. Based on the literature, the potential effects of depopulation on local development were indicated. The data of the Central Statistical Office and the results of own research carried out in three rural communes in 2019 were used. The occurrence of regional differentiation of rural depopulation processes in Poland was found. Analysing the phenomenon at the local level, it was found that as much as 38.6% of rural communes were characterized by depopulation (a loss of over 5% of the population), including for 10.7% of communes, the population decline in the analysed period was more than 15%. These areas can be considered as problem areas. A particularly unfavourable situation occurs in eastern Poland and the Opolskie Voivodeship. There was a positive correlation between the loss of population and the development of own revenues of communes’ budgets. Studies show that the phenomenon of depopulation is mainly caused by a negative natural increase, which was preceded by a migration outflow associated with the lack of jobs in rural areas.

The social environment of a university, which is comprised of students, teaching staff and parents, play an essential role in the educational process. Students’ decisions, learning and attainment could be considerably affected by relationships with their coursemates in particular. The present research therefore aims to examine students’ expectations towards their coursemates in the academic environment in Latvia. The research surveyed 979 students at Latvia University of Life Sciences and Technologies (2016–2018). The research has found that for students, the study process involves not only learning but also common events with their coursemates as well as informal relationships. Comparing the role of coursemates and the informal influence of parents and teaching staff, the respondents preferred the involvement of their coursemates. Larger differences in opinion were found for the informal role of teaching staff in learning. Of the respondents, 47% expected teaching staff to be friends, while 29% slightly agreed that the teaching staff had to be authorities and knowledgeable specialists, which indicated that it was important for some students to disassociate formal relationships from informal ones between students and teaching staff. The dispersion of opinions that could be observed for some variables might be explained by the specifics of the programmes the students represented. Statistically significant differences in opinion were found between bioscience and engineering students in relation to the attitude of teaching staff to students, parental support and coursemate support in learning (p is less than 0.05) – the bioscience students more often favoured informal relationship aspects.

This paper summarizes the results of a theoretical study as well as practically oriented research about the concept of managing the social sphere of the village and considers the problem-perspective field of development the social infrastructure management in the villages of the Republic of Kazakhstan. The chosen topic is relevant as an insufficiently studied scientific problem, and also has practical significance for the well-being and stable development of rural areas. The study describes the scheme of management of the rural social infrastructure in the Republic of Kazakhstan from the standpoint of object-subject, methods and results. Interviews of the rural population were conducted about the satisfaction with the rural social infrastructure and attitude towards the work of local governance. Rural settlements of Mangystau oblast currently have an average not significant level of social infrastructure development and the level of satisfaction of residents in different areas with its condition varies from very low to sufficient. The most important principles for the development of definition of rural social infrastructure management and its functions have been highlighted with the help of a comparative analysis of various approaches. According to the results of the study, it was concluded that the development of promising directions of management the rural social infrastructure requires a comprehensive study and evaluation of the facilities, mechanism and principles of this management and the identification of its current problems with regional development tasks.

Baltic States and Finland are vibrant regions with similar sized population and historical experience. Their adaptation to the new digital era is undermined by lack of professionals. Across the EU a major reason for labour shortage in science, technology, engineering and mathematics (STEM) fields professionals lies in the insufficient supply of higher education graduates due to stagnant enrolment rates in STEM fields. The aim of this research addresses the existing trends in tertiary STEM education in Finland, Estonia, Latvia and Lithuania. This includes the tasks of analysing the quantitative trends (enrolment and graduation) in the HEIs of Baltics and Finland over the period from 2013 to 2017 as well as analysing the structural changes taking place in the respective higher education systems from 2013 to 2018. The Baltic States combined have numerical advantages in terms of young people, and young professionals (25−34 year olds) with tertiary education. However, in terms of the number of students and graduates Finland is at the forefront. The largest proportion of students enrolling in STEM fields lie within Finland (33.9%) whereas the smallest one is in Latvia (24.0%). Finland is also a leader in the share and total number of information and communication technology (ICT) graduates. In the period 2013−2017 Latvia’s results improved in two (5th and 6th) of the STEM study fields, Lithuania made a remarkable result in one STEM (6th) field by 46.9%, Estonia saw a relative increase in the 5th and 6th study field while Finland experienced a numerical decrease in all three STEM fields.

Today technological progress is reshaping global economic development and changing the overall welfare of societies. Therefore, it is important to assess challenges and readiness of the European Union to use its capacity to ensure that technologies benefit people and bring them towards more inclusive societies enhancing opportunities to use artificial intellect for making health, education, agriculture, services and manufacturing industries more efficient and user friendly. The Digital Economy and Society Index analyses the digital performance of the EU Member States across five main dimensions: connectivity, human capital, use of internet, integration of digital technology, digital public services. However, despite intention to jointly develop Digital Single Market, the gap between the EU top digital countries and less digitally advanced countries remains large. The aim of this paper was to evaluate the digital performance indicators of the EU countries, in particular focusing to Poland and Latvia to assess their progress and potential of their human capital’s digital skills. The research is based on theoretical literature studies on industrial revolution stages, European Union Commission documents, indexes and publications available in relevant public institutions such as ministries and industry reports. The research employed monographic method, analysis and synthesis methods as well as graphical data analysis. The research results give evidence that currently Poland’s human capital is significantly better prepared for making use of future digital economy challenges than Latvia’s human capital, and there is a close link between countries’ R and D expenditures proportion of GDP and their human capital’s readiness to integrate in digital economy.