Sirvi Autor "Kaart, Tanel" järgi

Nüüd näidatakse 1 - 20 20

Additional concentrates do not affect feeding times of cows, but social positions of cows do
(2018) Soonberg, Maria; Kass, Marko; Kaart, Tanel; Leming, Ragnar; Arney, David R.; Estonian University of Life Sciences. Department of Animal Nutrition; Estonian University of Life Sciences. Department of Animal Breeding and Biotechnology
In robotic milking dairy systems lack of control over intakes can be problematic for balancing the forage and concentrate portions of diets. This can lead to proble ms associated with high concentrate intakes and concomitant low forage intakes. To check this as a problem, the feeding behaviour of cows was observed: the number of daily visits to the feed barrier, the duration of these visits and actual feeding, of high and low yielding cows. The cows were robot - milked and fed a ration comprising, separately, concentrate feed from a robot and a feeder, and a grass/clover silage mix forage at the feed barrier. Individual variation in visiting times and times spent at the feed barrier were greater than the effect of level of production. There was no evidence that cows with higher milk yields are differentially motivated to feed from forage. But more dominant cows spent more time feeding than submissive cows.
Bovine colostrum casein: Post-partum dynamics of micelle size, content, and associated traits
(Elsevier, 2024) Sats, Andres; Kaart, Tanel; Jõudu, Ivi
In milk, casein exists in the form of colloidal casein micelles (CM), which are crucial for various biological functions such as neonatal nutrition, calcium phosphate control, and amyloid fibril suppression. However, bovine colostrum casein has received less attention despite its importance. The objective of this study was to investigate the size of colostrum CM and their relationship with compositional traits during four post-partum milkings. A total of 184 samples (collected at 12 ± 1 h intervals) were obtained from 46 cows over four sequential milkings. The results demonstrated a significant decrease in CM size of colostrum from 227.2 nm to 201.9 nm over the four post-partum milkings. Fat, protein, casein content, and Brix values also declined across milkings and showed a positive correlation with CM size, although the relationships were nonlinear. Understanding CM size can be valuable for decision-making regarding colostrum and transition milk processing due to its significant role.
Bovine colostrum: Postpartum changes in fat globule size distribution and fatty acid profile
(Elsevier, 2022) Sats, Andres; Yurchenko, Sergei; Kaart, Tanel; Tatar, Vilma; Lutter, Liis; Jõudu, Ivi
Although “zero waste” valorization concepts are gaining increasing attention, colostrum, a byproduct of milk production, remains underused due to technological challenges. Information about the fat fraction and the size of fat globules is needed to address these challenges, but such information is currently lacking. This study aimed to fill this gap in the knowledge by measuring the size distribution of bovine colostrum fat globules (CFG) and analyzing its relationships with postpartum milkings, parity, and fatty acids (FA) profile. Four sequential postpartum colostrum samples were collected from 44 cows and analyzed for the abovementioned parameters. The results indicated that CFG size increases almost twice during postpartum milkings (from ~5 to ~10 μm), whereas lactation has little, if any, effect on CFG size. The FA profile analyses showed that the content of most FA in the fourth postpartum milking was different from the previous milkings. The correlation analyses between CFG size and FA profile also demonstrated that the fourth milking was clearly distinguishable from the first 3 postpartum milkings. For example, the saturated FA content from the first 3 milkings had a positive correlation with smaller CFG (and a negative correlation with larger CFG), whereas the fourth milking demonstrated no correlations. Based on these CFG size and FA profile analyses, the results of this study suggest that the first 3 postpartum milkings can be considered as colostrum, whereas the fourth milking represents transition milk. Information about CFG size distribution enables modification of the FA profile of colostrum products and the ability to create better valorization technologies for colostrum-based food and feed supplements.
The effect of ageing on chosen quality characteristics of skeletal muscles of Aberdeen Angus bulls
(2019) Soidla, Riina; Kerner, Kristi; Tepper, Marek; Tänavots, Alo; Kaart, Tanel; Jõudu, Ivi; Estonian University of Life Sciences. Institute of Veterinary Medicine and Animal Sciences. Chair of Food Science and Technology; Estonian University of Life Sciences. Institute of Veterinary Medicine and Animal Sciences. Chair of Animal Breeding and Biotechnology
The objective of the trial was to study the qualitative parameters of two muscles of Aberdeen Angus bulls with 250–300 kg carcass weight. After slaughter, longissimus thoracis et lumborum (LD) muscle and unseparated semimembranosus and adductor femoris(SMA) muscles were removed from the chilled carcasses. Muscles were vacuum-packed and wet aged at +2 °C for 10, 14, 18 and 20 days. Meat pH, electrical conductivity, shear force and colour were measured in all ageing times. Two thermal treatment methods (sous-vide (SV) and grilling) were used to determine cooking losses. The effects of muscles, ageing times and muscles by ageing times interaction was found with two-factorial analysis of variance. The effects of muscles, ageing times and muscle groups by ageing time interaction for raw and SV treated meat shear force was significant. Ageing decreased SV treated meat shear force from day 10 (40.8 N) to 18 (29.7 N). Fresh and SV treated LD muscle was tougher compared to the SMA muscle group, but SM showed a better response to the tenderness within 20 days of ageing. Redness and yellowness value was higher in the SM group in comparison to LD. Muscles showed good colour (lightness, redness and yellowness) stability within ageing for 20 days. No interactions were found between muscle groups and ageing times for SV treated and grilled beef cooking losses. However, SV treated meat lost more weight than grilled meat slices. The present study suggests that the optimal ageing time for meat is 18 days when the grilled meat cooking loss is the lowest.
Impact of climate change and other ecological factors on selected fish populations and fishery in Estonian large lakes
(Estonian University of Life Sciences, 2021) Öğlü, Burak; Kaart, Tanel; Kangur, Külli; Cremona, Fabien; Institute of Agricultural and Environmental Sciences; Kuparinen, Anna (opponent); Olli, Kalle (pre-opponent)
Human activities and climate change have become the most consequential threats to freshwater ecosystems and their inhabitants, especially fish. The response of the fish population to their environment is not always straightforward because of joint effect of multiple parameters. Fish and fisheries in shallow lakes can be directly affected by changes in air temperature, and also changes can occur via other factors in lakes that are under the influence of climate change. Also, response of each fish species to those parameters can vary depending on their tolerance and adaptation. Therefore, examining complex relationships between fish and their environment plays important role at understanding the dynamic of fish population and fisheries. In this study, we aimed to determine general driving factors, including climate change impact, for fish and fishery in Estonian large lakes. Results show that although winter is one of the most affected seasons by climate change in this region, then the selected fish species and eel fishery in Estonian large lakes were more sensitive to other environmental parameters. However, since the changes in winter surface water temperature and ice formation can affect other parameters, the indirect effect should not be ignored. Nutrients, spring-summer temperature and alkalinity were the most important environmental parameters for the selected fish biomass. We found that the high blue-green algae biomass during restocking period is the strongest negative impact for the eel fishery in Lake Võrtsjärv. The impact of factors can occur subsequently in fish communities and may lead to irreversible consequences, whereas the effects of concurrent climate change and nutrient enrichment can mutually reinforce their symptoms.
The indigenous arbuscular mycorrhizal fungal colonisation potential in potato roots is affected by agricultural treatments
(2018) Loit, Kaire; Soonvald, Liina; Kukk, M.; Astover, Alar; Runno-Paurson, Eve; Kaart, Tanel; Öpik, Maarja; Estonian University of Life Sciences. Chair of Plant Health; Estonian University of Life Sciences. Chair of Soil Science; Estonian University of Life Sciences. Chair of Crop Science and Plant Biology; Estonian University of Life Sciences. Chair of Animal Breeding and Biotechnology
There is an urgent need to develop novel approaches to enhance sustainable agriculture while not reducing cr op yields. Arbuscular mycorrhizal (AM) fungi establish symbiotic associations with most crop plants improving plant performance and soil health. This study investigated the extent of colonisation of potato roots by indigenous AM fungi in the arable soil under conventional and organic farming systems. Potato roots had greater AM fungal colonisation levels under organic than conventional farming, though in general, root colonisation levels were extremely low in both farming systems . Pota to root AM fungal colonisation was lower with higher soil P content and higher with higher annual C input. Trap plant root AM fungal colonisation was considerably higher than in field potato roots and showed that soil mycorrhizal inoculum potential was hig her in organic than in conventional farming. Thus, the positive impact of manure application in organic fields to the potato AM fungal colonisation can be explained by previous higher total annual C fresh organic matter input and lower soil P content under treatment. Furthermore, the natural AM fungal abundance in the soil was sufficient to colonise trap plant roots, suggesting a low mycorrhizal dependence of the studied potato cultivar.
The interaction of soil aggregate stability with other soil properties as influenced by manure and nitrogen fertilization
(Lithuanian Research Centre for Agriculture and Forestry, Vytautas Magnus University, 2018) Are, Mihkel; Kaart, Tanel; Selge, Are; Astover, Alar; Reintam, Endla; Institute of Agricultural and Environmental Sciences. Estonian University of Life Sciences; Institute of Veterinary Medicine and Animal Sciences. Estonian University of Life Sciences
Soil water-stable aggregate (WSA) stability is one of the most important indicators of soil health, because it influences chemical, biological and other physical properties. At the same time, WSA formation, stabilization and degradation are also some of the most complex processes that occur in the soil, making them difficult to fully understand. In particular, there is a lack of research on WSA stability in the Baltic region. To gain a better understanding how aggregation occurs in Estonian pedo-climatic conditions, this study was conducted in 2014– 2015 in a sandy loam Stagnic Luvisol (LV-st) (WRB, 2014). Potato and barley plots were analysed in a three-year crop rotation (potato → spring wheat → barley) with straw removal. The nitrogen (N) fertilization treatments were 0, 40, 80, 120 and 160 kg ha-1 yr-1 N, both without and with 40 Mg ha-1 fermented cattle farmyard manure (FYM) application prior to potato planting in the previous autumn. WSA stability was determined by Eijkelkamp’s wet sieving apparatus from air-dried soil samples of less than 2 mm in diameter. The study revealed a negative correlation (r = −0.16) between increased N rates and WSA stability, regardless of FYM applications. Although soil organic carbon (SOC) content increased with additional N fertilization rates, the reduction in soil acidity (pHKCl) levels caused by N fertilization, most likely repealed the positive SOC content effect on WSA stability. In general, compared with sole N fertilization, FYM application had a positive effect on WSA stability. However, even though WSA stability did not always increase with FYM applications, it still had a positive effect on bulk density, SOC content and soil acidity levels. Further research is needed in Estonia due to the complexities involved in the soil aggregation process.
Kaera lisasöötmise mõju rohusöödarikaste ratsioonide kasutamisel uttede toitumusele, jõudlusele ning vere glükoosi ja β-hüdroksübutüraadi sisaldusele mahefarmides
(Estonian Academic Agricultural Society, 2018) Piirsalu, Peep; Kaart, Tanel; Samarütel, Jaak; Tölp, Silvi; Ilves, Aire; Jaakson, Hanno; Nutt, Irje; Eesti Maaülikool. Veterinaarmeditsiini ja loomakasvatuse instituut. Söötmisteaduse õppetool; Eesti Maaülikool. Veterinaarmeditsiini ja loomakasvatuse instituut. Tõuaretuse ja biotehnoloogia õppetool
The aim of this study was to estimate the feeding strategies of pregnant and lactating ewes fed only silage/hay or supplemented with concentrates (oat) on the ewe body condition score (BCS), production of ewes (lambs born per ewe lambed (LB), lambs born alive per ewe lambed (LBA), lambs born dead per ewe lambed (LBD), lamb birth weight (LBW), lamb 100 day weight (L100DW)) and ewe blood glycose and β-hydroxy-butyrate (BHB) concentrations. The Estonian White Face and Texel ewes (107 ewes) were divided into two similar groups: the experimental group (59 ewes) and control group (48 ewes). For 45–60 days before lambing (from 90th–105th day of gestation) the experimental ewes were fed in addition to forage feeds (silage, hay or pasture grass) 0.22 kg of organic oat per day (totally 10 kg in gestation period) and 0.3 kg of oat during suckling period (totally 13.5 kg per ewe). The control group of ewes were fed only with forage-based rations (silage, hay, pasture grass) without cereals. Ewe BCS was assessed before mating, on 130–140 day of pregnancy, after lambing (following 7th–10th day), during the 2nd suckling months (45–60 suckling day) and at weaning of lambs by two observers during the whole study. It was concluded that additional feeding of minimal amount of oats increased the ewes BCS in the experimental group at 130–140 day of pregnancy (BCS was respectively 3.36 and 2.97, p < 0.001) and on the 45–60th suckling day (BCS respectively 2.84 and 2.52, p < 0.001) compared with control ewes, but did not affect BCS of ewes at the end of the experiment (at weaning). Production traits (LBA, LBW, L100DW) nor ewes blood glycose and β-hydroxybutyrate (BHB) concentrations at the 130–140 days of pregnancy and 7–10 days after lambing were not affected by supplementation of oat to ewes' diet.
Parameterization of surface water temperature and long-term trends in Europe’s fourth largest lake shows recent and rapid warming in winter
(Elsevier, 2020) Öglü, Burak; Möls, Tõnu; Kaart, Tanel; Cremona, Fabien; Kangur, Külli; Chair of Hydrobiology and Fishery. Institute of Agricultural and Environmental Sciences; Chair of Animal Breeding and Biotechnology. Institute of Veterinary Medicine and Animal Sciences
Changes in the ice phenology, seasonal temperature and extreme events are consistent evidence of climate change effect on lakes. In this study, we analyzed multiannual variability, determined long-term trends and detected changes in the frequency of extreme events in the surface water temperature (LSWT) of Lake Peipsi (Estonia/Russia) for nearly seven decades (1950-2018) and aimed to trace how the LSWT responded to the climate change. Dynamic water temperature parameters were calculated using the smoothed water temperature curve fitted to daily water temperatures. Our results showed that, although the average LSWT did not increase significantly on an annual basis since 1950 it rose rapidly in the winter season during the last decade (∼ +0.5 °C). Ice formation exhibited a marked (∼15 days) delay since 2007 resulting in a longer open water period. Extreme LSWT events did not occur more frequently. We noticed however significant fluctuating in winter LSWT in time series, starting from 2007 and also causing an increase in stochasticity. The consequences of the on-going winter warming and changes of ice cover phenology are expected to be crucial for Lake Peipsi ecosystem functioning and impact on lake biota, especially temperature-sensitive native fishes.
Redutseerivate suhkrute sisaldus Eestis enimkasvatatud köögiviljades saagikoristusjärgselt ja pärast säilitamist
(Estonian Academic Agricultural Society, 2022) Jalakas, Sirje; Roasto, Mati; Kaart, Tanel; Praakle, Kristi; Mäesaar, Mihkel; Elias, Terje; Eesti Maaülikool. Veterinaarmeditsiini ja loomakasvatuse instituut. Veterinaarse biomeditsiini ja toiduhügieeni õppetool; Eesti Maaülikool. Veterinaarmeditsiini ja loomakasvatuse instituut. Tõuaretuse ja biotehnoloogia õppetool
The study examined the content of reducing sugars in various varieties of potato, beetroot, turnip and pumpkin most commonly grown in Estonia. This study aimed to determine the varieties of vegetables with the lowest levels of reducing sugars after harvesting and after storage at two different temperatures (3 and 8 C). In the present study it was found that the potato variety with the lowest content of reducing sugars after harvesting and after six months of storage was potato variety 'Birgit' with 0.19 g 100 g–1after harvesting, 0.98 g 100 g–1 after storage at 3 C and 0.38 g 100 g–1 after storage at 8 C, respectively. All three varieties of the beetroot, after harvest, contained a similar amount of reducing sugars. After six months of storage, the lowest content of reducing sugars was determined for variety 'Boro' with 1.22 g 100 g–1 at 3 C and 0.96 g 100 g–1 at 8 C, respectively. The lowest average concentrations of reducing sugars from turnips were after harvest in the variety 'Kohalik sinine' with 3.38 g 100 g–1. Also after storage, the same variety had the lowest content of reducing sugars with 8.36 g 100 g–1 at 3 C and 3.76 g 100 g–1 at 8 C, respectively. From the pumpkin varieties, the lowest reducing sugars contents were determined for variety 'Gold Medal' with 2.64 g 100 g–1after harvesting, 2.40 g 100 g–1 after storage at 3 C and 1.90 g 100 g–1 after storage at 8 C. It can be concluded that all studied vegetables stored at 3 °C contained higher amounts of reducing sugars than those stored at 8 °C.
Redutseerivate suhkrute sisaldus Eestis enimkasvatatud köögiviljades saagikoristusjärgselt ja pärast säilitamist
(Estonian Academic Agricultural Society, 2022) Jalakas, Sirje; Roasto, Mati; Kaart, Tanel; Praakle, Kristi; Mäesaar, Mihkel; Elias, Terje
The study examined the content of reducing sugars in various varieties of potato, beetroot, turnip and pumpkin most commonly grown in Estonia. This study aimed to determine the varieties of vegetables with the lowest levels of reducing sugars after harvesting and after storage at two different temperatures (3 and 8 C). In the present study it was found that the potato variety with the lowest content of reducing sugars after harvesting and after six months of storage was potato variety 'Birgit' with 0.19 g 100 g–1after harvesting, 0.98 g 100 g–1 after storage at 3 C and 0.38 g 100 g–1 after storage at 8 C, respectively. All three varieties of the beetroot, after harvest, contained a similar amount of reducing sugars. After six months of storage, the lowest content of reducing sugars was determined for variety 'Boro' with 1.22 g 100 g–1 at 3 C and 0.96 g 100 g–1 at 8 C, respectively. The lowest average concentrations of reducing sugars from turnips were after harvest in the variety 'Kohalik sinine' with 3.38 g 100 g–1. Also after storage, the same variety had the lowest content of reducing sugars with 8.36 g 100 g–1 at 3 C and 3.76 g 100 g–1 at 8 C, respectively. From the pumpkin varieties, the lowest reducing sugars contents were determined for variety 'Gold Medal' with 2.64 g 100 g–1after harvesting, 2.40 g 100 g–1 after storage at 3 C and 1.90 g 100 g–1 after storage at 8 C. It can be concluded that all studied vegetables stored at 3 °C contained higher amounts of reducing sugars than those stored at 8 °C.
Supplementary materials : The effect of climate parameters on sheep preferences for outdoors or indoors at low ambient temperatures
(2020) Piirsalu, Peep; Kaart, Tanel; Nutt, Irje; Marcone, Giovanni; Arney, David
Supplementary Materials: Figure S1: Percentage of ewes outdoors dependent on ambient temperature. One point corresponds to one photograph, black lines denote the linear relationship (corresponding correlation coefficients with p-values are presented in the lower right corner of the figures) and the red lines indicate the potential non-linear relationship fitted with a LOWESS curve (locally weighted scatterplot smoothing); Figure S2: The wind chill values depending on the percentage of ewes outdoors. For each group of observations the empirical distribution of wind chill values is presented (solid black line), grey boxes mark the area with the middle 50% of values (inter quartile range), black bold lines denote the wind chill medians by groups and dotted horizontal lines indicate the overall mean; small horizontal lines denote single observations; Figure S3: Presence of humidity and wind chill values depending on the percentage of ewes outside. The two columns of graphs correspond to the observations made on the separate farms and the four rows of figures show the climate conditions when ≤70%, 71–80%, 81–90% or 91–100% of the ewes were outside; larger red dots denote the average wind chill and humidity values; Figure S4: Left-hand drawings: Percentage of ewes outdoors dependent on the direction of the wind. One point corresponds to one photograph and the red lines indicate the mean percentage of ewes outside, estimated with the LOWESS algorithm (locally weighted scatterplot smoothing). Right-hand pictures: location of paddocks in the terrain and their exposure to winds (Land Board, Web Map Application, https://xgis.maaamet.ee/maps/XGis? app_id=UU82A&user_id=at&LANG=2&WIDTH=1060&HEIGHT=918&zlevel=0,552500,6505000; https://xgis. maaamet.ee/ maps/XGis?app_id=UU82A &user_id=at&LANG=2&WIDTH=1060&HEIGHT=918&zlevel= 10,600339.625,6456813.28); Table S1: Data of observational studies and climate parameters.
Supplementary table for Henno et al. in the Journal of Dairy Science with the title Effect of monensin on milk fatty acid profile in dairy cows and on the use of fatty acids for early diagnosis of elevated blood plasma concentrations of nonesterified fatty acids and hyperketonemia
(2021) Henno, Merike; Ling, Katri; Kaart, Tanel; Ariko, Tiia; Karis, Priit; Jaakson, Hanno; Kuusik, Sirje; Ots, Meelis
The use of monensin to reduce health disorders associated with negative energy balance in transition cows is widely used. Precalving continuous-release monensin capsule administration affected postcalving milk FA profile indicating alterations in the rumen microbiota of these cows.
Terve loom ja tervislik toit : konverentsi "Terve loom ja tervislik toit 2014" postrid
(Eesti Maaülikool, 2014) Anton, Dea; Soidla, Riina; Püssa, Tõnu; Ilves-Luht, Aire; Harzai, Hedi; LIng, Katri; Kaart, Tanel; Soomets, Ursel; Kilk, Kalle; Ots, Meelis; Jeremejeva, Julia; Orro, Toomas; Kask, Kalle; Kaldre, Katrin; Haugjärv, Kerli; Liiva, Mari; Gross, Riho; Kass, Marko; Mäesaar, Mihkel; Roasto, Mati; Meremäe, Kadrin; Kramarenko, Toomas; Muutra, Kaisa; Raaperi, Kerli; Viltrop, Arvo; Saar, Tiiu; Põdersoo, Diivi; Golovljova, Irina; Tefanova, Valentina; Soonberg, Maria; Arney, David; Tänavots, Alo; Kaart, Tanel; Kiiman, Heli
Dea Anton, Riina Soidla, Tõnu Püssa. Analüüsid tomatiga rikastatud lihatoodetes.
Terve loom ja tervislik toit : konverentsi "Terve loom ja tervislik toit 2015" postrid
(Eesti Maaülikool, 2015) Anton, Dea; Püssa, Tõnu; Kokk, Kristiina; Olt, Andres; Ots, Meelis; Songisepp, Epp; Lindenberg, Kristiina; Roasto, Mati; Kramarenko, Toomas; Põldma, Siiri; Elias, Priit; Polikarpus, Annemari; Napolitano, Fabio; Grasso, Fernando; Di Palo, Rossella; Zicarelli, Fabio; Arney, David; De Rosa, Giuseppe; Raudsepp, Piret; Toomik, Peeter; Sabre, Dorel; Värv, Sirje; Kaart, Tanel; Viinalass, Haldja; Soonberg, Maria; Tänavots, Alo; Kiiman, Heli; Pärna, Elli; Pretto, Denis; Liiva, M.
Dea Anton, Tõnu Püssa. Fenoolsed ühendid tomatis ja nende tähtsus meie toidus.
Terve loom ja tervislik toit : konverentsi "Terve loom ja tervislik toit 2017" postrid
(Eesti Maaülikool, 2017) Mõtus, Kerli; Viltrop, Arvo; Emanuelson, Ulf; Raudsepp, Piret; Libek, Elmo; Rätsep, Reelika; Kikas, Ave; Libek, Asta-Virve; Arus, Liina; Kaldmäe, Hedi; Bleive, Uko; Ausmees, Kristo; Ehrlich-Peets, Kersti; Vallas, Mirjam; Veskioja, Andre; Rammul, Kadi; Rehema, Aune; Zilmer, Mihkel; Songisepp, Epp; Kullisaar, Tiiu; Karis, Priit; Jaakson, Hanno; Ling, Katri; Ilves-Luht, Aire; Samarütel, Jaak; Valdmann, Andres; Reimann, Ene; Pärn, Pille; Bruckmaier, Rupert M.; Gross, Josef; Kaart, Tanel; Ots, Meelis; Valdmann, Merle; Valdmann, Andres; Leming, Ragnar; Kaasik, Allan; Kruus, Eha; Lauringson, Enn; Põldma, Priit; Timonen, Anri Aino Elisa; Katholm, Jørgen; Petersen, Anders; Kalmus, Piret; Reimus, Kaari; Orro, Toomas; Emanuelson, Ulf; Niine, Tarmo; Lassen, Brian; Mäesaar, Mihkel; Roasto, Mati; Runin, Maksim; Olt, Andres; Mark, Elina; Pärn, Pille; Kurõkin, Jevgeni; Kavak, Ants; Reilent, Andres; Jaakma, Ülle
Kerli Mõtus, Arvo Viltrop, Ulf Emanuelson. Ammlehmade farmis hukkumise riskitegurid ekstensiivse pidamisviisiga lihaveisekarjades.
Terve loom ja tervislik toit : konverentsi "Terve loom ja tervislik toit 2019" stendiettekanded
(Eesti Maaülikool, 2019) Jõudu, Ivi; Pääso, Piia; Kuldjärv, Rain; Bljahhina, Anastassia; Raudsepp, Piret; Anton, Dea; Meremäe, Kadrin; Roasto, Mati; Püssa, Tõnu; Sats, Andres; Laikoja, Katrin; Rünk, Katrin; Soidla, Riina; Kerner, Kristi; Tepper, Marek; Kaart, Tanel; Tänavots, Alo; Põldvere, Aarne; Karis, Priit; Henno, Merike; Ariko, Tiia; Jaakson, Hanno; Ling, Katri; Ots, Meelis; Leming, Ragnar; Kass, Marko; Nahkur, Esta; Namm, Aimar; Torga, Taavi; Arend, Andres; Aunapuu, Marina; Olt, Andres; Songisepp, Epp; Soonberg, Maria; Barraclough, Rosie; Haskell, Marie; Arney, David
Ivi Jõudu, Piia Pääso. Eesti Maaülikooli Toidu- ja kõrvalsaaduste väärindamise tehnoloogiate ERA õppetool (VALORTECH).
Terve loom ja tervislik toit : konverentsi "Terve loom ja tervislik toit 2020" stendiettekanded
(Eesti Maaülikool, 2020) Stulova, Irina; Kriisa, Marie; Opmane, Agita; Bogdanova, Ilze; Kriisa, Marie; Viirma, Maret; Taivosalo, Anastassia; Kriščiunaite, Tiina; Kütt, Mary-Liis; Viiard, Ene; Vilu, Raivo; Mäesaar, Mihkel; Roasto, Mati; Nahkur, Esta; Namm, Aimar; Torga, Taavi; Arend, Andres; Aunapuu, Marina; Carnovale, Francesca; Phillips, Clive J. C.; Kuus, Kaisa; Kramarenko, Toomas; Kerner, Kristi; Jõudu, Ivi; Venskutonis, P.R.; Tänavots, Alo; Viidu, Dagni-Alice; Kuningas, Carmen; Mõtus, Kerli; Värv, Sirje; Sild, Erkki; Jõgi, Krista; Kaart, Tanel; Viinalass, Haldja
Irina Stulova, Marie Kriisa, Agita Opmane, Ilze Bogdanova. Glükoosi-galaktoosi siirupi tootmine ning selle kasutamine erinevates toodetes.
Terve loom ja tervislik toit : konverentsi "Terve loom ja tervislik toit 2021" stendiettekanded
(Eesti Maaülikool, 2021) Nahkur, Esta; Andrianov, Vladimir; Namm, Aimar; Torga, Taavi; Arend, Andres; Aunapuu, Marina; Olt, Andres; Loit, Kaire; Puidet, Britt; Püssa, Tõnu; Riisberg, Märt; Ots, Meelis; Sild, Erkki; Marcone, Giovanni; Kaart, Tanel; Piirsalu, Peep; Arney, David Richard; Carnovale, Francesca; Jin, Xiao; Descovich, Kris; Guo, Wenliang; Shi, Binlin; Phillips, Clive J.C.; Kass, Marko; Haskell, Marie; Kuus, Kaisa; Mäesaar, Mihkel; Roasto, Mati; Koskar, Julia; Anton, Dea; Raudsepp, Piret; Meremäe, Kadrin; Kramarenko, Toomas; Rusalepp, Linda; Rätsep, Reelika; Kaldmäe, Hedi; Bleive, Uko; Tedersoo, Triin
Esta Nahkur, Vladimir Andrianov, Aimar Namm, Taavi Torga, Andres Arend, Marina Aunapuu. Luude vaagnapõhja mineraalne tihedus lehmadel.
Water satability of soil aggregates in a 50-year-old soil formation experiment on calcareous glacial till
(Pleiades Publishing, Ltd., 2020) Are, Mihkel; Kauer, Karin; Kaart, Tanel; Selge, Are; Astover, Alar; Reintam, Endla; Institute of Agricultural and Environmental Sciences. Estonian University of Life Sciences; Institute of Veterinary Medicine and Animal Sciences. Estonian University of Life Sciences,
Soil formation on the human time scale is immensely time consuming, although it can be significantly accelerated through the effects of vegetation. The content of water-stable aggregates (WSAs) is a useful indicator for determining both the soil development level and the soil quality. However, in severely degraded soils, especially in the Baltic pedoclimatic region, the effects of vegetation on the aggregate stability have been poorly studied. Therefore, to obtain more knowledge about the impact of vegetation on WSA, and thereby knowing how to improve it, this study was conducted on a long-term soil formation experiment in Estonia near Tartu. In 1964, the initial soil from an area of 20 × 8 m down to 100 cm depth was replaced with a sandy loam calcareous glacial till. The experiment started on April 26, 1965, when plants were sown on the plot. The topsoil (0–20 cm) samples were analyzed in 1966, 2000, 2007, and 2014. The study indicated that perennial grasses (meadow fescue and common meadow-grass) fertilized with P40K75, compared to N150P40K75, decreased the WSA content, as well at the accumulation rate of soil organic carbon (SOC) and the total nitrogen content (Ntot). The hybrid alfalfa treatment resulted in the significantly highest SOC and Ntot accumulation, but not in the overall highest WSA content. Under barley, manure positively affected the WSA and SOC, though many other physical properties were not improved. Compared to the initial till under bare fallow, the SOC and Ntot contents were significantly higher under grown crops, but the WSA content remained the same. In addition, regardless of the grown crops, the WSA of larger (0.25–2 mm) aggregates was substantially higher than that of smaller (0.25–1 mm) aggregates. Also, as the relationship between WSA and SOC in the study was linear, the soil was far from C saturation and still in development. Overall, it can be concluded that the cultivation of perennial grasses and hybrid alfalfa on the severely eroded soil is the most rational option to improve the water stability of aggregates and increase the SOC and Ntot contents. However, because of the complexity of the aggregation process, further research is still needed.

Sirvi Autor "Kaart, Tanel" järgi

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