07
MAY
2014

Effect of dietary exogenous phytase supplementation in growing and fattening pigs

Three balance feeding trials were performed with 3 groups male castrated pigs during the starter, grower and finisher periods. The animals were housed in specially designs individual cages that allowed for separate collection of urine and faeces. Each trial comprised 5 days preliminar
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07
MAY
2014

Shelter Policies in the Management of Canine Aggression

Like many countries Bulgaria has faced serious problems concerning the stray dog population dynamics. Today, municipal authorities widely apply the catch-castrate-release method which allows for free roaming dogs to be caught, vaccinated, castrated, tagged and subsequently released. S
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07
MAY
2014

Effect from the addition of VemoZim F(phytase) on diets with decreased content of phosphorus on the microstructure of tibia in chickens broilers

The subject of the study was to investigate the effect of the addition of different doses of the new Bulgarian enzyme preparation – VemoZim F (activity 5000 FТU/g) to wheat-corn-soyabean meal diets, with 30% decreased content of available phosphorus on the microstructure of tibia in b
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07
MAY
2014

Ethological evaluation of a building for free housing of dairy cows. II. Behavioral activities in the winter

The aim of the research was through a study of four areas of satisfaction of the biological requirements of animals to make ethological evaluation of abuilding for free-range dairy cows: freedom of locomotion, social contacts, conditions for having a rest and available symptoms of dis
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06
MAY
2014

Comparison of the effects of Natuphos® 5 000 G and Optiphos® phytases utilization in broiler chicken feeding with maize-soybean diets

An experiment with 96 male broiler chickens (hybrid ROSS 308), distributed in 3 groups, 32 chickens each, was conducted. Each group consisted of 4 subgroups, 8 chickens each. Live weight, the retention of nitrogen, calcium and phosphorus in the chickens’ organisms were monitored
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06
MAY
2014

Investigations on the content of lead and cadmium in compound feed additives

The lead and cadmium content of samples from the most commonly utilized feed additives (limestone, dicalcium phosphate, sodium chloride, zinc, vitamin and trace element premixes) was analyzed by means of atomic absorption spectrophotometry. It was found out that up to 30% of the allow
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06
MAY
2014

The effect of pregnancy on milk yield in Bulgarian Murrah buffalo cows

The effect of pregnancy on milk yield in Bulgarian Murrah buffalo cows P. Penchev, Y. Ilieva, Tz. Peeva
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24
APR
2014

Present day situation and needs for further development of protein evaluation systems for ruminants. A review.

Present day situation and needs for further development of protein evaluation systems for ruminants. A review. N. Todorov
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