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Karandusovska I.,Slovak University of Agriculture | Mihina S.,Slovak University of Agriculture | Mihina S.,National Agricultural and Food Center | Bosansky M.,Slovak University of Agriculture
Research in Agricultural Engineering | Year: 2015

The aim of this experiment was to analyze the changes of ammonia production and greenhouse gases in frequent type of stables for dairy cows in winter. Two analyzed stables were situated side by side, one of which is after reconstruction of housing and ventilation technology and the second stable remained in original state. Variances of the mass concentration of gases differed significantly (P < 0.05), and the production of all gases monitored in winter was higher in the original stable. The average ammonia production was 2.45 ± 1.9 mg/m3 in the reconstructed stable, while in the original stable it was 5.1 ± 2.7 mg/m3. Average CO2 production was nearly twice higher in the unreconstructed building, namely 2,045.5 ± 862.3 mg/m3, while in the renovated facility it was 1,254.2 ± 416.2 mg/m3 (P < 0.05). The described type of reconstruction provides increased comfort for animals, which gives rise to a significant increase in production parameters, but also allows up to twice the reduction of hazardous pollutants such as CO2 and ammonia. Source


Simonova M.P.,Slovak Academy of Sciences | Laukova A.,Slovak Academy of Sciences | Zitnan R.,National Agricultural and Food Center | Chrastinova L.,National Agricultural and Food Center
Czech Journal of Animal Science | Year: 2015

The interactions between probiotic bacteria and the immune system in animals are known, but particularly in rabbits have not been sufficiently documented. Therefore the present study deals with the effect of the enterocin-producing probiotic strain Enterococcus faecium CCM7420 on the growth performance and jejunal morphometry in rabbits. Forty-eight weaned rabbits of male sex (NZB breed) at 5 weeks of age were randomly divided into experimental (EF) and control group (CG) with 24 rabbits in each group. Each day of the treatment period (21 days), the rabbits in the EF group were administered a fresh culture of the E. faecium CCM7420 strain (5.0 × 108 CFU/animal/day in their drinking water); for the next 21 days after probiotic cessation the rabbits had untreated drinking water (the whole experiment lasted for 42 days). All animals had access to water ad libitum. Three animals from each group were randomly selected for slaughter at days 21 and 42 of the experiment to measure morphological parameters (villus height (VH), crypt depth (CD), VH: CD ratio) of the intestinal tissue in the proximal jejunum. The average daily gain was higher in EF group (39.49 g) than in CG (39.04 g). The jejunum VH, surface area, and VH: CD ratio increased, while CD decreased in EF group compared to CG. Inferring from these results, we conclude that administration of E. faecium CCM7420 strain to rabbits may improve weight gain due to better utilization of feed and larger absorption surface in the gut and also may positively influence the health status via enhancing the gut health in rabbits. Source


Mihina S.,Slovak University of Agriculture | Mihina S.,National Agricultural and Food Center | Bodo S.,Slovak University of Agriculture | Galik R.,Slovak University of Agriculture | And 2 more authors.
Agricultural Engineering International: CIGR Journal | Year: 2015

The main aim of the paper is to assess an alternative way of disposal of pollutants from housing area, where the air is sucked from spaces below the animals. Measurements were taken in experimental conditions of enriched cage for 10 hens. Pipe for suction was located under the floor of the cage. Gas concentration was determined by the device 1412 Photo acoustic Multi-gas Monitor. Air samples were collected at the animal's head level. Air temperature was continuously registered and air velocity was measured. Measurements were conducted for six consecutive days in each season of the year (spring, summer, autumn and winter). The obtained results were compared with the concentration of harmful gases obtained without the use of the exhausting device. Average values of harmful gases concentrations obtained with utilisation of air suction device placed under the floor of the cage were almost in all cases lower. According to season of the year they varied without air suction device in CO2 832.06 to 1000.75 mg/m3 versus 813.405 to 957.59 mg/m3 with the device exhausting air from the space under the floor. In N2O it was 0.951 to 1.076 mg/m-3 compared with 0.972 to 1.055 mg/m3, in NH3 from 0.013 to 0.092 mg/m3 compared with 0.007 to 0.069 mg/m3, in H2S from 0.171 to 0.579 mg/m3 compared with 0.17 to 0.436 mg/m3 and in CH4 2.076 to 7.211 mg/m3 compared with 1.516 to 5.018 mg/m3. Changing the way of housing ventilation significantly reduced the air flow rate at the level of laying hens’ heads, too. In winter, it was on average 0.6 m/s in traditional with a fan placed in the wall compared to 0.11 m/s in ventilation by tubes located beneath the floor of the cage. In summer it was much higher 1.2 m/s compared to 0.15 m/s. While the temperature at the level of birds’ heads was in winter season higher at the alternative way of ventilation (23.90°C compare to 18.10°C), it had slightly opposite effect during the other seasons in this experiment. This finding needs additional research. © 2015, Int. Comm. of Agricultural and Biosystems Engineering. All rights reserved. Source

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