خيارات البحث
النتائج 81 - 90 من 96
The effect of LED lighting dosage on photosynthetic indices in tatsoi
2018
Kaciusis, M., Lithuanian Research Centre for Agriculture and Forestry, Akademija, Kedainiai distr. (Lithuania) | Samuoliene, G., Aleksandras Stulginskis Univ., Akademija, Kauno reg. (Lithuania)
Plant factories provide possibilities to get optimal yield of green leafy vegetables entire year independent from the season. The technology of light-emitting diode (LEDs) light has become one of the most powerful tools in photophysiological researches of various horticultural plants. In order to manage plant physiology and improve productivity, it is necessary to develop new LEDs technologies in horticulture. The aim of the study was to investigate different lighting intensities and elevated red light (660 nm) effect on tatsoi photosynthetic parameters. All plants were grown under the same light sources where overall photosynthetic photon flux density (PPFD) varied from 200 to 300 µmol mE-2 sE-1. Three days before harvesting red light intensity (640 and 660 nm) was increased until 132 µmol mE-2 sE-1 and 660 nm until 188 µmol mE-2 sE-1 at 16 hours photoperiod. In the last treatment merely 24 hours photoperiod was applied. The photosynthetic indices in tatsoi were determined by non-destructive methods using LI-6400XT portable photosynthesis system, OS5p fluorometer, DUALEX optical sensor and CID leaf spectrometer. Research was performed in 2017 – 2018 winter season. The obtained data revealed that the total photosynthetic photon flux density (PPFD) at level of 200 µmol mE-2 sE-1 was sufficient for optimal CO2 assimilation in tatsoi plants. The increased PPFD of LED light at pre-harvest stage resulted in reduced photosynthetic parameters of plants.
اظهر المزيد [+] اقل [-]The impact of Fusarium graminearum infection on different plant seeds
2018
Rasiukeviciute, N., Lithuanian Research Centre for Agriculture and Forestry, Akademija, Kedainiai distr. (Lithuania) | Kelpsiene, J., Lithuanian Research Centre for Agriculture and Forestry, Akademija, Kedainiai distr. (Lithuania)
Healthy seeds are essential for the optimal plant population and yield, but seed-borne pathogens, such as Fusarium spp., may reduce seed germination, quality and cause damping-off of the seedlings. Fusarium graminearum is a dominant pathogen of cereal crops and can cause significant losses of grain yield and quality. It is important to evaluate the role of alternative inoculum source in crop rotation. The aim of this study was to assess the impact of F. graminearum infection on different plant seed germination and seed infestation. The research was conducted at the Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, in 2017. Visually healthy seeds of bean (Vicia faba L.), pea (Pisum sativum L.), lupine (Lupinus angustifolius L.), soybean (Glycine max. (L.) Merr.), lucerne (Medicago sativa L.), white (Trifolium repens L.) and red (Trifolium pratense L.) clover were inoculated with 10 mL of F. graminearum suspension, adjusted to 1×106 conidia per mL. Seed infection was counted 2 and 6 days after inoculation (DAI), seed germination energy and reduction rate – after 3 DAI and germination index – 6 DAI. Results showed that all inoculated seeds were covered with typical to F. graminearum red-purple mycelium. The results of inoculated seeds with F. graminearum showed red-purple mycelium growth on the seeds (infection from 21.25 up to 100%). The results showed that germination energy decreased on pea (2.56%) and lupine (7.79%) seeds. Our results suggest that various plant seeds differently react to F. graminearum infection. The highest infection of F. graminearum was obtained on pea, lupine seeds and the least on red clover.
اظهر المزيد [+] اقل [-]Analysis of farming system outputs and methods of their evaluation
2018
Novikova, A., Kaunas Univ. of Technology (Lithuania) | Startiene, G., Kaunas Univ. of Technology (Lithuania)
Farming outputs in agriculture depend on the nature of production, i.e. different farming systems generate different outputs. All these outputs are important for the society, and, therefore, require an integrated approach in view of the specific farming characteristics, where market and non-market outputs are taken into account. Therefore, the paper focuses on analysis of farming system outputs and methods of their evaluation. The objectives of this paper are to define the features of different farming systems and their outputs, then, to analyse the methods of evaluation of farming system outputs used in the studies. In order to achieve the research aim, analysis of economic scientific literature has been conducted; characteristics of farming systems and their outputs have been analysed; evaluation methods of the market and non-market farming system outputs, revealing their advantages and disadvantages, have been examined. Methods of systemic and logic analysis have been applied to analysis of the farming system outputs and their evaluation. The analysis has shown that intensive farming systems generate more market goods, while extensive farming systems – more public goods. Price-based methods are mostly used for the evaluation of market outputs of farming systems. Stated preferences methods are the most universal techniques used for the determination of the values from non-market farming system outputs. Hedonic pricing approaches are used for evaluation of specific agricultural public goods related to recreation or leisure and related to the particular groups of users.
اظهر المزيد [+] اقل [-]Assessment of farm efficiency and productivity: a data analysis envelopment approach
2018
Syp, A., Institute of Soil Science and Plant Cultivation – State Research Institute, Pulawy (Poland) | Osuch, D., Institute of Agricultural and Food Economics – National Research Inst., Warsaw (Poland)
The objective of this article is to assess farm efficiency and productivity change in specialised large farms located in the region of Mazowsze and Podlasie during the years 2014 − 2016. For this, we used the non-parametric Data Envelopment Analysis (DEA) method and Malmquist index. Calculations were performed for three types of large farms classified as: field crop, pig and dairy. The study shows that mean technical efficiency of large field crop, pig and dairy farms amounted to 80, 75 and 70%, respectively. Technical inefficiency of field crop farms come mainly from scale efficiency, while of pig and dairy farms equally from pure technical and scale efficiency. It shows that inefficient management practices had an impact on farm performance. Therefore, in order to increase competitiveness of farms, an improvement of management practices is required. In the studied period the share of farms operating under increasing return was as follows: 67, 72, and 81%, respectively for field crops, pig and dairy farms. The improvement of efficiency of those farms could be achieved by increasing their size. The results indicate that 8% of field crops, 12% of dairy and 16% of large pig farms were operating under decreasing scale efficiency, which means that those farms were operating above the optimal scale. The increase in their efficiency could be achieved through size reduction. In dairy farms the average annual productivity growth of 2% was recorded. In pig farms the productivity reduction of 5.4% was observed. It was the result of a decrease in technological efficiency.
اظهر المزيد [+] اقل [-]Economic component of ANC payments. Example of the farms in Poland
2018
Wieliczko, B., Institute of Agricultural and Food Economics – National Research Inst., Warsaw (Poland) | Kurdys-Kujawska, A., Koszalin Univ. of Technology, Poland | Sompolska-Rzechula, A., West Pomeranian Univ. of Technology, Szczecin (Poland)
Conducting agricultural activity in areas facing natural constraints (ANC) affects farms’ production and economic results. ANC payments were introduced to compensate farmers for higher costs and lost income. The aim of the study is to compare the production and economic results of farms receiving ANC support with other farms. It was hypothesized that ANC farms achieve lower production and economic results than other units. The analysis is based on Polish FADN data concerning 2015. The sample included 12,105 farms, of which 4,652 (38.43%) received ANC subsidies. To describe the characteristics of the surveyed farms, positional measures were used due to strong asymmetry. The Mann-Whitney U test was used to assess the significance of differences in distributions. The results indicate the existence of significant differences in the production potential, production and economic efficiency of farms receiving ANC payments and ones without them. Agricultural farms receiving ANC payments are characterized by a significantly smaller area of agricultural land, a lower share of arable land in the UAA and a smaller share of leased land. They also have lower production volume, lower land and labour productivity. They achieve relatively lower incomes. Nevertheless, the payments to a small extent reduce these differences. On this basis, it can be concluded that ANC payments in Poland do not provide full compensation for differences in the production and economic results of a farm with worse agri-environmental conditions. Therefore, the impact of the CAP on the economic results of farms located in ANC is relatively small.
اظهر المزيد [+] اقل [-]Fish processing by-products exploitation and innovative fish-based food production
2018
Silovs, M., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia);Piejūra, SIA, Nīca Municipality (Latvia)
In the fish processing sector, the further exploitation of by-products and wastes left after industrial production promotes sustainability of raw materials, access to added value and increased profitability, as well as contributes to environmental protection by reducing the volume of dumped products. Besides obvious value-added features, it also addresses the clear market demand dictated by prospects of the population growth. Given the limitations for further expansion of the husbandry sector, fish-based items available for human consumption represent a major avenue for coping with the pressing demands of increased population and enable the development of innovative food items of high nutritional importance. Current research is focused on the analysis of fish processing by-product utilization possibilities available up to date and introduces empirical findings of innovative food product development made on the basis of by-products left after traditional canned “Sprats in oil” production. In Latvia, “Sprats in oil” production is an integral part of fish processing sector and the rural economy overall. The production accounts for at least 30% of raw material left as by-products (smoked heads and, in some cases, tails) after such technological stage as smoked sprats processing into cans. Efforts were made to prepare value-added and attractive to customer food product made out of this fish-processing by-products, which are typically processed to a fishmeal or just dumped as waste. The study demonstrates a strong potential for its utilization to a range of fish pâté with various flavours and of high nutritious value.
اظهر المزيد [+] اقل [-]Protection of traditional handicrafts: the Lithuanian case
2018
Pareigiene, L., Vytautas Magnus Univ., Kaunas (Lithuania) | Ribasauskiene, E., Vytautas Magnus Univ., Kaunas (Lithuania)
The preservation and nurturance of national heritage products, which are inherent to particular localities, are very significant for the economic and social vitality, and sustainable development of a country. National handicrafts are a means of maintaining national identity, originality, and distinction in a constantly changing world. For a long time Lithuania was an agrarian country, so its cultural heritage and handicrafts are closely related to the rural environment, culture, traditions, and materials. Nowadays this heritage is a very important source of alternative employment opportunities. In 2007 Lithuania enacted the Law of National Heritage Products; in 2008 and 2011 Programmes for the Protection of National Heritage Products, their Market and Development of Handicrafts were approved. The goal was to provide governmental support to create favourable conditions for the creation, realisation and popularisation of national heritage products. The aim of this paper is to evaluate the situation with traditional handicraft protection in Lithuania within the Programme implementation framework and to submit proposals for better implementation. The analysis shows that not all Programme goals were achieved: those for which municipalities were responsible were implemented better than those implemented by governmental institutions. A presumption could be made that the top-down approach is only partially suitable for the Programme implementation. The partners from the ‘bottom’ (associations, local activity groups) should be involved in the implementation of the Programme to reach better results.
اظهر المزيد [+] اقل [-]Topicality of career guidance at schools for promoting of students’ professional self-determination
2018
Korna-Opincane, E., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia) | Katane, I., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia)
Professional self-determination is an important issue for anyone in the course of a lifetime. The dynamic nature of modern social and economic circumstances makes the issue even more topical. It determines the necessity to improve the career development support system currently existing in the field of education, where various specialists, by purposeful and systematic cooperation, help students in setting their career goals, understating the changeable working environment, seeing various alternatives and making deliberate career decisions. The career support is important as it helps learners choose a suitable professional sphere, profession and educational institution for continuation of their self-improvement upon acquiring of general secondary education. The aim of the research is to provide a scientific basis for topicality of career guidance implementation in school educational environment in order to promote the students’ professional self-determination. In Latvia, a number of career development guidance systems, including counselling and student career support methods and forms are being created and approbated in the educational environment, focusing on the career support curriculum and principles, which would ensure a purposeful implementation of students’ professional self-determination at schools.
اظهر المزيد [+] اقل [-]Innovative methods and approaches towards the development of the students’ entrepreneurial competencies
2018
Ragauskaite, A., Aleksandras Stulginskis Univ., Akademija, Kauno reg. (Lithuania) | Zaleckiene, J., Aleksandras Stulginskis Univ., Akademija, Kauno reg. (Lithuania)
In educational strategy papers, it is determined that entrepreneurial development should be implemented already in schools. Various methods and approaches can be used for the development. The majority of entrepreneurial competences are developed at the university – subjects devoted to the development of entrepreneurship are included in the study programs. Environment of the university is very friendly to this – not only because of activities devoted to entrepreneurship occurring in the academic environment, plenty seminars and trainings, but also because of the students’ personal maturity and motivation. Scholars actively raise the following questions: how to develop entrepreneurial competences effectively? Which methods are the most applicable? What kind of innovative methods are the most necessary? 104 students, who tried simulation traineeship of entrepreneurial development, were questioned in order to analyse the impact of methods and the change in entrepreneurial competences. The research was carried out in the Faculty of Economics and Management of Aleksandras Stulginskis University. The participants of the research were involved in the business simulation, where they had an opportunity to estimate themselves and improve their backgrounds, abilities and skills. Methods promoting and developing creativity were applied in simulation business enterprises; however, not all methods had worked. The methods of graphic representation were used by the minority and they were not considered to be very effective. The aim of the research was to determine entrepreneurial competences and innovative educational methods theoretically and to test empirically the development of entrepreneurial competences via simulation method.
اظهر المزيد [+] اقل [-]Content marketing decisions for the customer value creation in social networks: ‘Ilzenberg manor’ case
2018
Repoviene, R., Vytautas Magnus Univ., Kaunas (Lithuania) | Pazeraite, A., Vytautas Magnus Univ., Kaunas (Lithuania)
This article presents theoretical and practical aspects of content marketing decisions for the customer value creation in social networks by using the case of the organic farm ʻIlzenberg manor’. Focus of this paper is to determine which content marketing decisions create the biggest value for the customer in social networks. The first part of the paper deals with theoretical insights into the content marketing decisions and their ability to create the customer value in social networks. Findings of theoretical analysis disclose that there are interfaces between content marketing, separate content marketing decisions and the customer value in the context of social networks. Respectively, it leads to an assumption that the usage of content marketing decisions can be valuable for the customer value creation in social networks. The second part of the paper focuses on the case analysis of the organic farm ‘Ilzenberg manor’. In order to determine which content marketing decisions create value for the customer in social networks, authors examine a correlation between separate content marketing decisions and consumer value indicators by using data from ʻIlzenberg manor’ Facebook page. The obtained results expose that not all content marketing decisions create value for the customer in social networks. Hence, it means that a selection of separate content marketing decisions in social networks can be made through the customer value perspective. The article ends with insights, conclusions, limitations and future research possibilities.
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