THE INFLUENCE OF BIOLOGICALLY ACTIVE SUPPLEMENT " BIORIL " ON PERFORMANCE OF FATTENING LAMBS

Investigations were carried out in order to determine whether the addition of bioactive substances "Bioril" on different percentages in concentrate (0.3% and 0.6%), has an impact on weight gain and feed conversion in lambs. For the experiment were used lambs of Mis sheep breed, which at the beginning of the experiment were 50 days of age. The experiment lasted 42 days, so it is over when all lambs had 92 days of age. The experiment included 60 lambs (30 male and 30 female) were divided into three groups-20 lambs per group (control group I and II and III experimental groups ).The results shows that the greatest gains made lambs of group III. The difference between body weight of group I and II was 1.62 kg and was statistically significant (P<0.01). The difference between body weight of I and III group was 1.87 kg and was also statistically significant (P<0.01). The difference between the body weight of II and III groups was 0.25 kg and was not statistically significant (P>0.05). We find that lambs of all groups consumed per kg of gain more concentrated than hay. The difference in feed conversion between groups is not significant (P>0.05), but lambs of groups III and II consumed per unit of gain approximately 5g/kg and 10g/kg less concentrate than lambs of group I. Most hay consumed by lambs of group I. The difference in hay consumption between groups I and II is 20 g/kg. Lambs in group III consumed 30 g/kg which was less hay than group I and less 10 g/kg than lambs of group II. The most energy per kg of gain was consumed by lambs of group III, whereas lambs in II group consumed the least energy.


Introduction
In majority countries of Europe, lamb meat is the most important product of the sheep and growth of lambs has special interest for the farmers.Growth of lambs depends on a number of genetic and environmental factors (Morris et al., 2000, Petrović, 2000, Petrović et al., 2011, Hansen and Shrestha, 2002, Notter et al., 2005).It is known that feeding is the most important factor that influences the expression of genetic potential of lambs (Santos et al., 2002, Ruzic Muslic et al, 2009).In the European Mediterranean countries lambs are traditionally reared with their dams in indoor conditions until weaning and there after fattened with concentrate (Safiudo et aI., 1998).The feeding of lambs is an important concentration of the meal.Energy is the major dietary element that is responsible for the different utilization of nutrients and thereby the productivity and gain of an animal (Bellof and Pallauf, 2004, Pittroff et al., 2006, Hosseini et al., 2008, Khalid et al, 2011).Because of the small volume of digestive organs of lambs on one side and greater intensity of growth on the other, some unconventional feeds are used, such as fats of animal origin (Diaz et al., 2002;Samy,2006;Ružić-Muslić et al., 2007).In addition to traditional nutrients, there are also various bioactive supplements.Bioactive Supplements "Bioril" is concentrated salt sodium fatty acids, which comes from sheep wool fat sweat.The fat content in it reaches over 60%, including up to 90% free fatty acids, 6% of free alcohol, 1% of hydrocarbons, 2% aliphatic alcohol and a minor content of methyl esters of fatty acids."Bioril" was developed in All-Russian Scientific Research Institute of Sheep and Goat Breeding-Stavropol, of the Russian Agricultural Academy (Efremov et al., 1992).Bioril is highly effective and environmentally clean product promotes active development of the microflora in the rumen, increased enzymatic processes, increase the total number of VFA and total lipids, while the hydrogenation processes are enhanced, there is a rapid growth of body weight and wool growth in sheep (Ermolovna, 1998, Novopashina, 1999).
The objective of this paper was to investigate the effect of "Bioril" on fattening characteristics of lambs in conditions outside of Russia.

Material and methods
Investigations were carried out on an experimental farm of sheep at the Institute of Animal Husbandry, Belgrade-Zemun.For the experiment were used lambs of Mis sheep, which at the beginning of the experiment were 50 days of age.The experiment lasted 42 days, so it is over when all lambs had 92 days of age The experiment included 60 lambs (30 male and 30 female) were divided into three groups-20 lambs per group (I control group and II and III experimental groups).
The composition of the concentrate and content of "Bioril" in concentrate are shown in Table 1.In addition to the concentrate, lambs were fed alfalfa hay ad libitum.Water also was available ad libitum.Samples were analyzed using the conventional chemical process -WEENDE.Feed refusals were collected and weighed daily.Lambs were weighed before feeding initially and then at 7 day interval throughout the experimental period.After completion of 92-days experimental period, final live weight of each animal was recorded.Statistical analyses were performed with StatSoft STATISTICA Version 8.

Results and discussion
Body development of fattening lambs during the experiment is given in Table 3.
It can be seen that the lambs at the start of experiments had the same age and body weight uniformity, which is varied in the range from 18:38 to 18:40 kg.This is the stage where lambs are adapted for consuming hay and concentrate and may give an answer on the composition and quality of nutrients.If we look at the results of the body weight of lambs at the end of the experiment, we can see that the lowest weight were in lambs of group I, while the lambs of group II and III had a higher final body weight.The difference between body weight of the I and II group was 1.62 kg and was statistically significant (P<0.01).The difference between body weight of the I and III group was 1.87 kg and was also statistically significant (P<0.01).The difference between the weight of the body II and III groups was 0.25 kg and was not statistically significant (P>0.05).
The differences of total weight gain between control and experimental groups of lambs also has the same trend.The highest total weight gain were recorded in group III (15.24 kg) and lowest were in lambs of group I (13.36kg).Daily gain in lambs of group III was higher for 12.15% compared with group I and 1.65% as compared to group II.Lambs in group II have higher daily gain then lambs of I group for 10.67% .The reasons for the greater gain of the experimental groups of lambs was a product "Bioril", which promotes active development of the microflora in the rumen, increased enzymatic processes, increase the total number of VFA and total lipids, while the hydrogenation processes are enhanced, there is a rapid growth of body weight.These results are in agreement with the data quoted by Efremov et al., (1992), Novopashina (1999).If we look at the differences in growing lambs of group II and III, we can conclude that higher doses of 'Bioril" (0.6% compared to 0.3%) in our study did not give greater effect on growth of lambs.Ermolovna (1998) stated that the use of "Bioril" in feeding young sheep of 10-15 g per head per day provides an increase in body weight gain of sheep for 11.0 -21.8%, compared with the control, with better digestibility of feed, feeding of broiler chickens in amount of 2.5% by weight of feed -by 13.6% compared with the control.Our studies are consistent with Ruzic Muslic et al., 2009, Montossi et al., 2007, but there are authors who have different results.Titi et al. (2008) reported that yeast supplementation had no effect on growth rate in lambs and kids.Baranowski et al. (2007) also observed no difference in the mean daily live weight gain (238 g versus 225 g) in lambs fed diet supplemented with linseed and mineral bioplex than lambs fed control diet only.This attests to the fact that the content of the food supplement has a major role.In lambs production is very important that lambs consumed less feed per unit of gain.Only when we compare the gain with feed conversion, we can get a true picture of the genotype of lambs and the quality of the food consumed.From Table 4 we saw that lambs of all groups consumed per kg gain more concentrated than hay.The difference in feed conversion between groups is not significant (P>0.05).But lambs of groups III and II consumed per unit of gain approximately 5g/kg and 10g/kg less concentrate than lambs of group I.It is clear that lambs in II and III groups, which were fed with concentrate containing the "Bioril" consumed less concentrate per kg of gain.It is seen that the difference between experimental groups is small, only 5g/kg.Ermolovna (1998) stated that inclusion in the diet of sheep "Bioril" contributes to the development of microorganisms in the rumen: the number of bacteria increased by 36.9%,62% of the simplest.Change the microflora in the rumen contributes to the intensification of enzymatic processes, leading to an increase in total VFA in the rumen contents of 12%, mainly due to acetic and valeric acids.Number of total lipids in the rumen contents increased by 34% hydrogenation processes are enhanced essential fatty acids.It could be concluded that the higher content of bioactive supplement "Bioril" by microbiological and biochemical effects in the process of digestion, improved some sensory properties of the concentrate, which makes it more lambs consumed.Can say that Bioril has a similar effect of probiotics because, as stated Dutta et al.( 2009) positive effects of probiotics on the rumen environment and performance of ruminants have been intensively studied because they can beneficially modify microbial activities, fermentative and digestive functions in the rumen.It is further stated that probiotics can stimulate specific groups of beneficial bacteria in the rumen, and has provided mechanistic models that can explain their effects on animal performance.From the table 4, we can see that most hay consumed by lambs of group I.The difference between groups I and II is 20g/kg.Lambs in group III consumed 30g/kg less than group I and less 10g/kg than lambs of group II.The most energy per kg of gain consumed lambs of group III, whereas lambs in II group consumed the least energy.Other authors also reported that the energy level in the diet affects the growth of lambs.Seyed (2009) informed that the feed intake was higher for group fed on low energy diet compared with other treatment groups.The weight gain of the lambs fed on high-energy diet was increased by 31.60%, while those fed on low energy diet was decreased by 19.87%.The feed conversion was better in the group fed on high energy compared to other experimental groups.Ruzic et al.(2009) reported that With increase of diet concentration by adding 4% of tallow in forage mixture,tendency of reduction of consumption of dry matter, energy and protein per kg of gain was observed.Bahtiyarca et al. (2002) showed that the increase in protein and energy content of diets decreased the voluntary food intake.

Conclusion
Based on research conducted and the obtained results, we can conclude the following: the experimental groups of lambs that were fed concentrates with "Bioril" achieved higher daily gain, compared with the control group (P<0.01).The difference between body weight of the groups II and III was not statistically significant (P>0.05).The difference in feed conversion between groups is also not significant (P>0.05).Therefore, it is clear that experimental groups of lambs, which were fed with the concentrate containing the "Bioril" consumed less concentrate per kg of gain.We can also conclude that most hay consumed by lambs in group I.The most energy per kg of gain was consumed by lambs of group III, whereas lambs in group II consumed the least energy.