On a farm infectious diseases may occur by introducing infected animals, introduction of cattle in the incubation period, carcasses of animals that were not removed properly, vehicles, equipment, clothing and shoes of visitors or employees who have contact with other herds, more often contact with the herd, contact with other animals (horses, dogs, cats, wildlife, rodents, birds, insects), but also by contaminated objects, contaminated food, and improper management of manure when it comes to the creation of dust and scattering (Hristov, 2007). To prevent introduction of infection to the farm or farms in the environment, we use primary and secondary Biosafety measures. The most effective implementation of biosecurity measures on farms provides a development plan for that farm biosecurity. We have developed the biosecurity plan based on detailed observation and analysis of the relevance of indicators and on biosecurity which includes: 1. Making and submitting a written plan for achieving and maintaining biosecurity on farm production based on keeping proper records; 2. Isolation of he farm as a whole or individual segments of manufacturing and production operations; 3. Introduction of newly acquired animals in a herd; 4. Health of the herd; 5. Evaluations of the personnel and the equipment; 6. Traffic and movement control; 7. Attitude towards visitors; 8. Control of food and water; 9. Manure; 10. Disposal of carcasses of dead animals; 11. Relationship to other animals on the farm; 12. Population control of rodents and birds; 13. Sanitation (Stanković et al,, 2010).

The chemical composition, fermentation quality, mycological and mycotoxicological analyses of silage mixture, made of ground corn grain and spent P. ostreatus mushroom substrate, were investigated in this paper. Dry matter content in high moisture ground corn, at the time of ensiling was 70%, and in the spent substrate (on the Salt Cedar wood shaving basis) was 52.7%. Corn grain to spent substrate ratio in trials was: 100:0% (I), 90:10% (II), 80:20% (III) and 70:30% (IV) respectively. Content of the lignocellulose fractions in silage was slightly increased, and protein content was slightly decreased with the increase of spent substrate content. Contents of the VFA (volatile fatty acids) in silage, pH value, and NH3-N content were for the silage of very good quality. In the spent substrate 9 mold species were found, from which the most frequent were genus Penicillium, Paecilomyces variotii, and Trichoderma harzianum. In ground corn grain silage (I) presence of the yeasts was dominant (90.000/g). In combined trials (II-IV) only Penicillium (P. brevicompactum and P. echinulatum) mold species were found. Presence of molds and yeasts in investigated trials was within tolerated values for ensiled feedstuffs. Mycotoxin presence in silage was not determined

This paper analyzes the influence of the enzyme cocktail additive Allzyme Vegpro® in quantities of 0.1 and 0.2% on production results: daily weight gain, consumption and food conversion in weaned piglets. The experiment lasted 52 days. Nine litters of piglets were included. The initial body weight of piglets was 8-9 kg. The piglets were divided into three groups: Piglets with 0.2% of enzyme production achieved the best results. Although established differences were not statistically significant, the group of piglets fed with the addition of enzymes had less metabolic disturbances.

SažetakPoljoprivredna gazdinstva u srpskim enklavama na Kosovu predstavljaju okusnicu opstanka, razvoja i povratka raseljenog srpskog življa. Autori metodom posmatranja i metodom analize sagledavaju trenutno ekonomsko poslovanje poljoprivrednih gazdinstava a metodm sinteze u radu se daje predlog i rešenje za skladniji ekonomski razvoj i prosperitet srpskog stanovništva u enklavama na Kosovu i Metohiji. Putem formiranja klastera snizili bi se troškovi poslovanja poljoprivrednih gazdinstava, preko objedinjenih nabavki, zajedničkih isporuka i zajedničkog nastupa na tržištu. Došlo bi do povezivanja proizvodnje, obrazovanja, nauke (Poljoprivredni fakultet Lešak) i ispunjenja neophodnog uslova poljoprivrednog razvoja i podsticaja, zajednički rad na inovacijama, pristup novim veštinama i znanjima, podrška za partnerstvo, razvoj marketing strategije i brendiranje proizvoda. Razvojem klastera ostvaruju se širi ekonomski, socijalni i opšti društveni interesi srpske zajednice kroz povećanja zapošljavanja u seoskim sredinama, stimulacija mladih ljudi za ostanak na Kosovu, do unapređenja poljoprivredne proizvodnje i očuvanja životne sredine kao i drugih aspekata u ruralnim sredinama.Ključne reči: poljoprivredna proizvodnja, lokalni ekonomski razvoj

Many of cows' production traits are, mostly, interrelated so for those kinds of relationship are said it is a correlative relation of traits. The phenotypic correlation between two quantitative traits depict a value to which individuals upwards of the average value for one trait intend to be above, below or close to the average value for another trait. However, phenotypic correlations initiate the question what is the degree of influence of the genetic basis on observing the association between two traits and what is the influence of exogenous factors. Derived data about tested reproduction traits interrelation, at a Simmental cow farm, are very important for a simultaneous selection of cows in many traits. The average service period length of the total investigated population was 147 days, which was about 1.5 fold longer in regard to the upper value of the optimal level. That had a significant influence on duration of the first inter-birth interval which averaged 436.3 days. The average duration of pregnancy was 283.4 days and the age at the first calving 872 days. The defined genetic correlation coefficients between cows' fertility traits, in the herd, exceed analogous phenotypic correlations in all cases. The genetic interrelation of tested fertility traits ranged from powerless to very strong (from 0.209 to 0.941). Phenotypic correlations among reproductive traits ranged from negative (-0.131) to strong (0.888), which was with high statistical significance (P < 0.01).