The experiments included 50 does and 36 weaned rabbits of the White New Zealand breed. The animals were divided into two groups -experimental and control. The exeprimental group was supplemented with probiotic "ZOOVIT". The addition of "ZOOVIT" probiotic increases the fertility rate , which is 85,71 % in the experimental and 66,66% in the control group. The number of the live born rabbits is also higher in the experimental animals. In the experimental group is recorded a 10.8% lower mortality rate before weaning and a 10.9% higher average daily growth rate than in the control one. In rabbits for fattening, the experimental group has a 11.11% lower mortality rate. The additive used reliably increases live weight in the test group. Further studies are needed to establish the optimal doses of "ZOOVIT" in rabbit does, growing rabbits and rabbits for fattening.
The demand for natural products is constantly growing in the current environmental situation. This encourages manufacturers to increase the production of these goods. However, almost all branches of the food industry use nowadays a large number of biologically active additives, mainly of synthetic origin. In this regard, the introduction of natural vegetable supplements in the composition of a traditional food product will contribute not only to an increase in the nutritional and biological value of the product, but also to expand the range of healthy food products. The possibility of using dietary fiber from root crops of scorzonera, immobilized on biopolymers, and chickpea flour obtained from chickpea beans bioactivated by germination in the amount of 5% and 15%, respectively, was studied in the work. Scientific substantiation of the effectiveness of the use of vegetable filler in the production of combined soft cheese was given. The cheese product produced has a mass fraction of fat in dry matter of 4.5%, a mass fraction of moisture not more than 64%, a mass fraction of salt not more than 2.0%. The use of dietary fiber as a food additive in cheese production gives the product a functional value. Dietary fiber, introduced in an amount of 5.0%, increases the yield of the finished product by 11-11.5%. Thus, applying the proposed technology for the production of a soft cheese product, it becomes possible to solve a number of technological, environmental and economic problems, including an increase in the nutritional value of a soft cheese product, due to enrichment with dietary fiber, macro- and micronutrients, as well as an increase in the biological value of the developed product by balancing the amino acid composition
The objective of this study was to estimate coefficients of variability heritability, genetic and phenotypic correlations between indicators of milk productivity in relation to milk yield and fat content, butter fat and protein content in milk. The foremost quality of 21st century Holstein cow is efficiency (Beaulieu, 1993). She must continue to increase both life production and production per year, preserving the quality. Due to the use of optimum breeding programs the rates of the genetic improvement of milk production have increased nearly twice in the 1990 as compared to those in the 1970 according to Aleksiev et.al. (1991), Vankov (1978), Vankov et.al. (1982) and Kennedy,(1991). A primary objective of this study was to determine coefficients of variability, heritability, genetic and phenotypic correlation between indicators of milk productivity in relation to milk yield and fat content, butter fat and protein content in milk. Heritability, genetic and phenotype correlation of milk productivity and protein content in milk of Bulgarian Black and White cows White were estimated, using the linear statistical model (Harvey 1977).
Оbject of the study were merino sheep raised in the farm of the Agricultural institute -Stara Zagora. The experiment was conducted with a group of 68 animals of different ages, lambing after treated with hormonal preparation according to adopted scheme during the out-of-breeding seasonin May. In the experimental group were included ewes which lambed earlier without making a selection in respect to their productivity.Animals were kept under the same conditions (stall-pasture) and fed the same rations with the concentrate mixture, rough, succulent feed and grazing in quantity and composition according to their physiological status and season from the fertilization until lambing. Hormonal pattern: setting pads for sheep type Sincro-part (30mg), removing pads after 12 days and giving ewes a PMSG injection at a dose of 500 UI, applying artificial insemination at the 50-55th hour.Body condition score and live weight of the animals were determined in 4 separate periods: 1st period (after mating), 2nd period (during pregnancy), 3rd period (after lambing), 4th period (before next mating service). Improving fertility in merino sheep is significantly influenced by the preparation of ewes for the mating by reaching the respective physiological status which is expressed by score over 2.5 according to the Body condition score method and live weight over 60 kg. Animals scored 2.75-3.50 before mating have a share of 91.18% from all the sheep in the flock and have the biggest number of lambs.
The study was carried out to establish dependence between some exterior measurements, productivity and body condition score (BCS) of ewe lambs from the Thracian merino breed, reared in the Agricultural Institute in Stara Zagora, Bulgaria. Ewe lambs included in the research were born during 2011-2015. The growth rate, as well as the main breeding traits as live weight, staple length, wool yield and pure fiber were studied, and body condition score was estimated at the age of 6, 9 and 18 months. Conclusions: 1) The lambs of the Thracian merino breed had high growth rates at an early age. 2) The increase in body weight and bone mass is more intensive from 6 to 9 months of age, followed by the increase of the body condition score. 3) Productive traits as wool production, staple length, wool yield and pure fiber showed high level in ewe lambs at the age of 18 months, when they have their first breeding season.
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