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The incidence of postpartum diseases - ketosis, acidosis, depending on which condition and structure of the of rations in transition
Bubnová, Zuzana ; Hučko, Boris (advisor) ; Jiří, Jiří (referee)
This thesis formed on the observation of the influence of body condition score (BCS) before calving on the prevalence of ketosis after calving and the structure of mixed ration on prevalence of rumen acidosis in production herd.
This thesis was made on the farm AGROBOS Ltd. in Slatina where 165 cows are raised. 25 cows and 10 heifers were assessed in dry period and whole herd of dairy cows in the production hall was monitored for performance (PM).
Body condition score of cows and heifers was assessed in the period before calving on a five point scale with resolution of 0.25 points. Blood samples were taken from them from the base of the tail after calving. The concentration of betahydroxybutyrate (BHB) was monitored in blood at first to fourth days after calving using FreeStyle Optimum NEO. The structure of mixed ration in the production hall was evaluated using Penn State separator. The fat protein ratio from the PM system MOOML was observed and evaluated for incidence of chronic rumen acidosis.
The measured values of BHB, the structure of the diet and the fat - protein ratio values were compared with the recommended values. As a criterium for a healthy state, the BHB concentration of 1.4 mmol / l was selected. The rumen acidosis limit for the fat protein ratio was set at 1.1. A lower fat protein ration was designated as ruminal acidosis. The suggested ration amounts for cows have been adjusted based on a grain mixture which was separately administered to dairy farms by the milking robot.
Ketosis was detected in 83 % of cows on the second or higher lactation of which 9.5 % had higher condition before calving, so 3.75 point or higher. All evaluated heifers suffered ketosis after calving and 70 % had elevated condition before calving.
The structure of the mixed ration had the highest deviations in proportions of large particles on upper sieve of separator. Up to 50 % of the particles for a mesh size of 19 mm were found.
The average fat protein ratio was 1.12 in the whole herd. Cows, which was measured for BHB and subsequently monitored in performance during first lactation, had in the first period the average proportion of fat - protein ratio of 1.09, suggesting that the heifers on average suffered from ruminal acidosis in early lactation. Cows at second and higher lactation had in the first month of performance the average ratio of fat and protein of 1.17.
Measured values: BCS and BHB; F/P and structure of mixed ration were statistically evaluated using correlation. But we have not confirmed of dependence on one production illness.
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Selected fabric metabolism parameters of dairy cows
KAŇKA, Vladimír
The aim of this study was to evaluate antiketogenic prophylaxis of the veterinary medicine Kexxtone, in breeding of Holstein cows, in the company Agrodam Hořepník, s.r.o. There were then evaluated the parameters of a metabolic state in the herd monitored. Furthermore I evaluated the milk yield, amount of fats, proteins, lactose and somatic cells in the milk during 100 days of lactation and subsequently, the level of pregnancy after the 1st and the 2nd insemination was evaluated. The observation took place from July 2014 to December 2014 in a way that every two months was selected 8 cows and 8 heifers with a similar calving date. After that they were split into two groups i.e. into the experimental group (the kexxtone medicine was used) and into the control one. These cows were bled and milked. Subsequently, those biological samples were sent to a laboratory to be diagnosed. The higher milk yield was found within the experimental group and so as the content of milk constituents, i.e. fats and proteins. A beneficial effect of this antiketogenic medicine on the amount of ketones in blood and milk of animals was also confirmed within the experimental group. There were not found any significant statistical differences in other monitored parameters.
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Nutrition status of dairy cows and occurrence of metabolic disorders in postnatal period on a family farm
FREJLACH, Tomáš
The objective of this thesis was to evaluate the nutritional status of dairy cows, the incidence of subclinical ketosis and other postpartum problems of 24 dairy cows on a family farm. The evaluation took place 1 month before birth and 1 month after birth. This period determines the course of subsequent lactation and the next reproductive cycle. It was ascertained that the dairy cows were most often in excellent (3-3.5) condition and there were no incidences of extreme emaciation or obesity. The incidence of mild subclinical ketosis in the dairy cows on the farm is quite common and was detected in 23 dairy cows, which amounts to 95.8%. Other postpartum disorders occur rarely.
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