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Agricultural science in Latvia Full text
2011
Rivza, P., Latvia Univ. of Agriculture, Jelgava (Latvia) | Rivza, B., Latvia Univ. of Agriculture, Jelgava (Latvia)
The paper describes the development of agricultural science in the last 20 years in a context of the development of science in Latvia. It characterizes the changes in legislation connected with the development of science, the problems with science potential and the development of doctoral studies. The structure and provision of funding for science, including using of the EU structural funds is described.
Show more [+] Less [-]Research for Rural Development 2017. Annual 23rd International Scientific Conference Proceedings. Volume 2 Full text
2017
The four independent reviewers estimated each paper and recommended 81 articles for publishing at the proceedings consisted of 2 volumes, which started life as presentations at the Annual 23rd International Scientific Conference “Research for Rural Development 2017” held at the Latvia University of Agriculture, in Jelgava, on 17 to 19 May 2017. In the retrospect of four months later, we can count the Conference as a great success. The theme – Research for Rural Development - attracted participation more than 155 researchers with very different backgrounds. There were 124 presentations from different universities of Poland, Kazakhstan, France, Czech Republic, Lithuania, Estonia, India, Russia and Latvia. Thank you for your participation! We are sure that you have learned from the presentations and discussions during the conference and you can use the outcomes in the future. The cross disciplinary proceedings of the Annual 23rd International Scientific Conference “Research for Rural Development 2017” (two volumes since 2010) are intended for academics, students and professionals. The subjects covered by those issues are crop production, animal breeding, agricultural engineering, agrarian and regional economics, food sciences, veterinary medicine, forestry, wood processing, water management, environmental engineering, landscape architecture, information and communication technologies. The papers are grouped according to the sessions in which they have been presented.
Show more [+] Less [-]Research for Rural Development 2021. Annual 27th International Scientific Conference Proceedings.Volume 36 Full text
2021
International Scientific Conference: Research for Rural Development 2020, 27, Jelgava (Latvia), 12−14 May 2021
The Latvia University of Life Sciences and Technologies and Organizing Committee of Annual 27th International Scientific Conference ‘Research for Rural Development 2021’ tried to continues a tradition of bringing together researchers, academic and professionals in Jelgava, from 12 to 14 May, 2021 from all over the world. But, unfortunately, this year again the rules were set by the Covid-19 virus pandemic. We did start new tradition from 2020, account from 1st until the 27th conference and totally are 36 Volumes. The interdisciplinary papers contributed the most recent scientific knowledge in crop production, animal breeding, agricultural engineering, agrarian and regional economics, food sciences, veterinary medicine, forestry, wood processing, water management, environmental engineering, information and communication technologies. These Proceedings will furnish the scientists of the world with an excellent reference volume. We trust also that this will be an impetus to stimulate further study and research in all these areas.
Show more [+] Less [-]Latvijas Lauksaimniecības un meža zinātņu akadēmija 1992-2012
2012
Rivza, B. (ed.), Academy of Agricultural and Forestry Sciences of Latvia, Riga (Latvia) | Brence, I. (ed.), Academy of Agricultural and Forestry Sciences of Latvia, Riga (Latvia) | Strikis, V. (ed.), Academy of Agricultural and Forestry Sciences of Latvia, Riga (Latvia)
Jubilejas krājumā dokumentēts LLMZA paveiktais 20 gados. Atsevišķi apskatīta LLMZA prezidija darbība un īstenotie uzdevumi un Lauksaimniecības zinātņu, Pārtikas un veterinārmedicīnas zinātņu, Mežzinātņu, Inženierzinātņu un Agrārās ekonomikas zinātņu nodaļu sasniegtais aizvadītajā laika periodā. Krājumā publicēti LLMZA Statūti un akadēmijas locekļu, goda locekļu un ārzemju locekļu saraksts. Nobeigumā apkopots akadēmijas nodaļu darbs angļu valodā. | The collection covers 20 years of competence of different departments of the Academy of Agricultural and Forestry Sciences of Latvia. The activities of the Presidium and the Departments of Agricultural Sciences, Food Science and Veterinary Medicine, Forestry, Engineering and Agricultural Economics are mentioned in separate chapters as well as the Statute of Academy, list of members, honorary members and foreign members.
Show more [+] Less [-]Research for Rural Development 2020. Annual 26th International Scientific Conference Proceedings.Volume 35 (Online resource) Full text
2020
Latvia University of Life Sciences and Technologies and Organizing Committee of Annual 26th International Scientific Conference on Research for Rural Development 2020 tried to continues a tradition of bringing together researchers, academic and professionals in Jelgava, from 13 to 15 May, 2020 from all over the world. But, unfortunately, this year the rules were set by the coronavirus disease (COVID-19) pandemic. We did start new tradition from 2020, account from 1st until the 26th conference and totally are 35 volumes. The interdisciplinary papers contributed the most recent scientific knowledge in agricultural sciences, forestry and wood processing, food sciences, veterinary medicine, economics, rural and environmental engineering, water management; information and communication technologies and education. These Proceedings will furnish the scientists of the world with an excellent reference volume. We trust also that this will be an impetus to stimulate further study and research in all these areas.
Show more [+] Less [-]Research for Rural Development 2024: annual 30th international scientific conference proceedings Full text
The International Scientific Conference “Research for Rural Development” is organized annually by Latvia University of Life Sciences and Technologies, this year, for the 30th time. This year the conference comprised two segments: the main conference, hosted by LBTU in Latvia on May 15–16, 2024, and a joint section held at the Tashkent Institute of Chemical Technology (TICT), which was web-streamed as part of the conference program. According to a Memorandum of Understanding, LBTU and TICT agreed to co-organize the joint section within the conference framework. Participation in the joint section was exclusive to participants from TICT. The conference brought together scientists from several countries to present their research papers. A total of 52 studies were presented at the main conference, and 8 studies were presented online by representatives of the Tashkent Institute of Chemical Technology. The interdisciplinary research covered various topics, including rural development, health, innovations, forestry, machine learning, regional economy, social science, entrepreneurship, animal production, information and communication technologies, veterinary medicine, and education. We believe that these Proceedings will be an excellent reference volume for researchers worldwide and it will stimulate further research in all the areas mentioned above. We would like to thank all authors and reviewers for their contribution in international scientific level. The conference organizing team extends its gratitude to the employees of the IT and Scientific Equipment Centre for their excellent technical support, and to the chairpersons of the conference sections: Z. Vītoliņa, G. Mazure, R. Silakalne, I. Straupe, A. Vintere, I. Janpavle, A. Kļaviņš, and S. Shakhnoza for their effective organization and management of the sections. We hope to see you at the Latvia University of Life Sciences and Technologies next year during the 31th International Scientific Conference “Research for Rural Development 2025”.
Show more [+] Less [-]Contribution of Jānis Lielmanis in plant breeding in Latvia Full text
2012
Belicka, Ina | Kalmanis, Zigurds
In autumn 1922, the Ministry of Agriculture of Latvia delegated agronomist Jānis Hilarijs Lielmanis (1895-1970) to organise and establish the State Stende Breeding Station. For many years, he was a director (1922-1940) and later a researcher (1945-1956) of the State Stende Breeding Station. Under the guidance of Lielmanis, an infrastructure for breeding work was formed and research into the morphological, biological, and economic traits of local plant varieties obtained from different Latvian regions were begun in the station. Already in 1924, breeders started breeding of cereals, peas, flax, potato, and clover, using selection from local and foreign varieties and also hybridisation. Until 1945, breeders in Stende, under the guidance of Jānis Lielmanis, developed 16 plant varieties, in the period from 1945 to 1960 — 19 varieties. Parallel to his work in Stende, Lielmanis delivered lectures on plant breeding at the University of Latvia (1933-1940) and lectures on genetics, breeding, and seed production at the Latvian University of Agriculture (1940-1944, then Jelgava Academy of Agriculture; 1945-1948). In the later part of his life, Lielmanis worked in the Latvian Scientific Research Institute of Agriculture (1957-1970), where he conducted research in crop farming and breeding of red clover using traditional breeding methods, as well as polyploidy and heterosis methods, which was modern for that time. The research results of oat growth and acclimatisation were summarised by Lielmanis in his habilitation paper (1933), and the results of breeding and growth of red clover — in his dissertation thesis. He was awarded a degree of candidate of agricultural sciences in 1957 and a doctoral degree in 1968. He was very principled in his scientific viewpoints; he supervised five doctoral theses written by candidates of agricultural sciences, published 457 scientific and popular-scientific articles, and wrote six books. Taking into consideration the contribution of Lielmanis to Latvian agricultural science, in 1995, the Jānis Lielmanis award was established, which has been received by breeders, breeding groups, and seed producers for their contribution in plant breeding and seed production in Latvia.
Show more [+] Less [-]Proceedings of the Scientific and Practical Conference Agricultural Science for Successful Farming | Zinātniski praktiskās konferences ''Lauksaimniecības zinātne veiksmīgai saimniekošanai'' raksti Full text
2013
Karklins, A. (ed.-in-chief), Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture
Key role of lipid management in nitrogen and aroma metabolism in an evolved wine yeast strain Full text
2016
Rollero, Stéphanie | Sanchez, Isabelle | Camarasa, Carole | Ortiz-Julien, Anne | Sablayrolles, Jean-Marie | Dequin, Sylvie
Key role of lipid management in nitrogen and aroma metabolism in an evolved wine yeast strain Full text
2016
Rollero, Stéphanie | Sanchez, Isabelle | Camarasa, Carole | Ortiz-Julien, Anne | Sablayrolles, Jean-Marie | Dequin, Sylvie
Background: Fermentative aromas play a key role in the organoleptic profile of young wines. Their production depends both on yeast strain and fermentation conditions. A present-day trend in the wine industry consists in developing new strains with aromatic properties using adaptive evolution approaches. An evolved strain, Affinity T ECA5, overproducing esters, was recently obtained. In this study, dynamics of nitrogen consumption and of the fermentative aroma synthesis of the evolved and its ancestral strains were compared and coupled with a transcriptomic analysis approach to better understand the metabolic reshaping of Affinity T ECA5. Results: Nitrogen assimilation was different between the two strains, particularly amino acids transported by carriers regulated by nitrogen catabolite repression. We also observed differences in the kinetics of fermentative aroma production, especially in the bioconversion of higher alcohols into acetate esters. Finally, transcriptomic data showed that the enhanced bioconversion into acetate esters by the evolved strain was associated with the repression of genes involved in sterol biosynthesis rather than an enhanced expression of ATF1 and ATF2 (genes coding for the enzymes responsible for the synthesis of acetate esters from higher alcohols). Conclusions: An integrated approach to yeast metabolism-combining transcriptomic analyses and online monitoring data-showed differences between the two strains at different levels. Differences in nitrogen source consumption were observed suggesting modifications of NCR in the evolved strain. Moreover, the evolved strain showed a different way of managing the lipid source, which notably affected the production of acetate esters, likely because of a greater availability of acetyl-CoA for the evolved strain.
Show more [+] Less [-]Key role of lipid management in nitrogen and aroma metabolism in an evolved wine yeast strain Full text
2016
Rollero, Stéphanie | Sanchez, Isabelle | Camarasa, Carole | Ortiz-Julien, Anne | Sablayrolles, Jean-Marie | Dequin, Sylvie
Background: Fermentative aromas play a key role in the organoleptic profile of young wines. Their production depends both on yeast strain and fermentation conditions. A present-day trend in the wine industry consists in developing new strains with aromatic properties using adaptive evolution approaches. An evolved strain, Affinity T ECA5, overproducing esters, was recently obtained. In this study, dynamics of nitrogen consumption and of the fermentative aroma synthesis of the evolved and its ancestral strains were compared and coupled with a transcriptomic analysis approach to better understand the metabolic reshaping of Affinity T ECA5. Results: Nitrogen assimilation was different between the two strains, particularly amino acids transported by carriers regulated by nitrogen catabolite repression. We also observed differences in the kinetics of fermentative aroma production, especially in the bioconversion of higher alcohols into acetate esters. Finally, transcriptomic data showed that the enhanced bioconversion into acetate esters by the evolved strain was associated with the repression of genes involved in sterol biosynthesis rather than an enhanced expression of ATF1 and ATF2 (genes coding for the enzymes responsible for the synthesis of acetate esters from higher alcohols). Conclusions: An integrated approach to yeast metabolism-combining transcriptomic analyses and online monitoring data-showed differences between the two strains at different levels. Differences in nitrogen source consumption were observed suggesting modifications of NCR in the evolved strain. Moreover, the evolved strain showed a different way of managing the lipid source, which notably affected the production of acetate esters, likely because of a greater availability of acetyl-CoA for the evolved strain.
Show more [+] Less [-]Organic matter composition and the protist and nematode communities around anecic earthworm burrows Full text
2016
Andriuzzi, Walter S. | Ngo, Phuong-thi | Geisen, Stefan | Keith, Aidan M. | Dumack, Kenneth | Bolger, Thomas | Bonkowski, Michael | Brussaard, Lijbert | Faber, Jack H. | Chabbi, Abad | Rumpel, Cornelia | Schmidt, Olaf
Organic matter composition and the protist and nematode communities around anecic earthworm burrows Full text
2016
Andriuzzi, Walter S. | Ngo, Phuong-thi | Geisen, Stefan | Keith, Aidan M. | Dumack, Kenneth | Bolger, Thomas | Bonkowski, Michael | Brussaard, Lijbert | Faber, Jack H. | Chabbi, Abad | Rumpel, Cornelia | Schmidt, Olaf
By living in permanent burrows and incorporating organic detritus from the soil surface, anecic earthworms contribute to soil heterogeneity, but their impact is still under-studied in natural field conditions. We investigated the effects of the anecic earthworm Lumbricus centralis on fresh carbon (C) incorporation, soil organic matter composition, protists, and nematodes of a Cambisol under grassland. We used plant material labelled with stable isotope tracers to detect fresh C input around earthworm-occupied burrows or around burrows from which the earthworm had been removed. After 50 days, we sampled soil (0-10 cm depth) in concentric layers around the burrows, distinguishing between drilosphere (0-8 mm) and bulk soil (50-75 mm). L. centralis effectively incorporated fresh C into the drilosphere, and this shifted soil organic matter amount and chemistry: total soil sugar content was increased compared to unoccupied drilosphere and bulk soil, and the contribution of plant-derived sugars to soil organic matter was enhanced. Earthworms also shifted the spatial distribution of soil C towards the drilosphere. The total abundance of protists and nematodes was only slightly higher in earthworm-occupied drilosphere, but strong positive effects were found for some protist clades (e.g. Stenamoeba spp.). Additional data for the co-occurring anecic earthworm species Aporrectodea longa showed that it incorporated fresh C less than L. centralis, suggesting that the two species may have different effects on soil C distribution and organic matter quality.
Show more [+] Less [-]Organic matter composition and the protist and nematode communities around anecic earthworm burrows Full text
2016
Andriuzzi, Walter S. | Ngo, Phuong-Thi | Geisen, Stefan | Keith, Aidan M. | Dumack, Kenneth | Bolger, Thomas | Bonkowski, Michael | Brussaard, L. (Lijbert) | Faber, Jack H. | Chabbi, Abad | Rumpel, Cornelia | Schmidt, Olaf
By living in permanent burrows and incorporating organic detritus from the soil surface, anecic earthworms contribute to soil heterogeneity, but their impact is still under-studied in natural field conditions. We investigated the effects of the anecic earthworm Lumbricus centralis on fresh carbon (C) incorporation, soil organic matter composition, protists, and nematodes of a Cambisol under grassland. We used plant material labelled with stable isotope tracers to detect fresh C input around earthworm-occupied burrows or around burrows from which the earthworm had been removed. After 50 days, we sampled soil (0–10 cm depth) in concentric layers around the burrows, distinguishing between drilosphere (0–8 mm) and bulk soil (50–75 mm). L. centralis effectively incorporated fresh C into the drilosphere, and this shifted soil organic matter amount and chemistry: total soil sugar content was increased compared to unoccupied drilosphere and bulk soil, and the contribution of plant-derived sugars to soil organic matter was enhanced. Earthworms also shifted the spatial distribution of soil C towards the drilosphere. The total abundance of protists and nematodes was only slightly higher in earthworm-occupied drilosphere, but strong positive effects were found for some protist clades (e.g. Stenamoeba spp.). Additional data for the co-occurring anecic earthworm species Aporrectodea longa showed that it incorporated fresh C less than L. centralis, suggesting that the two species may have different effects on soil C distribution and organic matter quality.
Show more [+] Less [-]Organic matter composition and the protist and nematode communities around anecic earthworm burrows Full text
2016
Andriuzzi, Walter S. | Ngo, Phuong-Thi | Geisen, Stefan | Keith, Aidan M. | Dumack, Kenneth | Bolger, Thomas | Bonkowski, Michael | Brussaard, Lijbert | Faber, Jack H. | Chabbi, Abad | Rumpel, Cornelia | Schmidt, Olaf | School of Global Environmental Sustainability ; Colorado State University [Fort Collins] (CSU) | School of Agriculture and Food Science ; University College Dublin [Dublin] (UCD) | Department of Soil Quality ; Wageningen University and Research [Wageningen] (WUR) | Ecologie fonctionnelle et écotoxicologie des agroécosystèmes (ECOSYS) ; Institut National de la Recherche Agronomique (INRA)-AgroParisTech | Department of Terrestrial Ecology ; Netherlands Institute for Ecology (NIOO-KNAW) | Institute for Zoology, Department of Terrestrial Ecology ; Universität zu Köln = University of Cologne | Centre for Ecology and Hydrology | School of Biology and Environmental Science ; University College Dublin [Dublin] (UCD) | Alterra ; Wageningen University and Research [Wageningen] (WUR) | Unité de Recherche Pluridisciplinaire Prairies et Plantes Fourragères (P3F) ; Institut National de la Recherche Agronomique (INRA) | European Project: 264465
By living in permanent burrows and incorporating organic detritus from the soil surface, anecic earthworms contribute to soil heterogeneity, but their impact is still under-studied in natural field conditions. We investigated the effects of the anecic earthworm Lumbricus centralis on fresh carbon (C) incorporation, soil organic matter composition, protists, and nematodes of a Cambisol under grassland. We used plant material labelled with stable isotope tracers to detect fresh C input around earthworm-occupied burrows or around burrows from which the earthworm had been removed. After 50 days, we sampled soil (0-10 cm depth) in concentric layers around the burrows, distinguishing between drilosphere (0-8 mm) and bulk soil (50-75 mm). L. centralis effectively incorporated fresh C into the drilosphere, and this shifted soil organic matter amount and chemistry: total soil sugar content was increased compared to unoccupied drilosphere and bulk soil, and the contribution of plant-derived sugars to soil organic matter was enhanced. Earthworms also shifted the spatial distribution of soil C towards the drilosphere. The total abundance of protists and nematodes was only slightly higher in earthworm-occupied drilosphere, but strong positive effects were found for some protist clades (e.g. Stenamoeba spp.). Additional data for the co-occurring anecic earthworm species Aporrectodea longa showed that it incorporated fresh C less than L. centralis, suggesting that the two species may have different effects on soil C distribution and organic matter quality.
Show more [+] Less [-]Organic matter composition and the protist and nematode communities around anecic earthworm burrows Full text
2016
Andriuzzi, Walter S. | Ngo, Phuong-thi | Geisen, Stefan | Keith, Aidan M. | Dumack, Kenneth | Bolger, Thomas | Bonkowski, Michael | Brussaard, Lijbert | Faber, Jack H. | Chabbi, Abad | Rumpel, Cornelia | Schmidt, Olaf
By living in permanent burrows and incorporating organic detritus from the soil surface, anecic earthworms contribute to soil heterogeneity, but their impact is still under-studied in natural field conditions. We investigated the effects of the anecic earthworm Lumbricus centralis on fresh carbon (C) incorporation, soil organic matter composition, protists, and nematodes of a Cambisol under grassland. We used plant material labelled with stable isotope tracers to detect fresh C input around earthworm-occupied burrows or around burrows from which the earthworm had been removed. After 50 days, we sampled soil (0-10 cm depth) in concentric layers around the burrows, distinguishing between drilosphere (0-8 mm) and bulk soil (50-75 mm). L. centralis effectively incorporated fresh C into the drilosphere, and this shifted soil organic matter amount and chemistry: total soil sugar content was increased compared to unoccupied drilosphere and bulk soil, and the contribution of plant-derived sugars to soil organic matter was enhanced. Earthworms also shifted the spatial distribution of soil C towards the drilosphere. The total abundance of protists and nematodes was only slightly higher in earthworm-occupied drilosphere, but strong positive effects were found for some protist clades (e.g. Stenamoeba spp.). Additional data for the co-occurring anecic earthworm species Aporrectodea longa showed that it incorporated fresh C less than L. centralis, suggesting that the two species may have different effects on soil C distribution and organic matter quality.
Show more [+] Less [-]