Resume

VemoHerb Tribens consists of specially selected and scientifically proven combination of dry extracts from Bulgarian remedial plants, manufactured by VEMO Corp., Sofia, Bulgaria. The product contains saponins, sterols, flavonoids, tannins, polyphenols and others. It acts as a natural aphrodisiac, increasing the libido and the erectile function, affects positively the volume of ejaculation, the number and motility of the sperm, stimulates the production of testosterone and fertile germ cells.

The objective of the experiment is studying the effect of the application of VemoHerb Tribens on the reproductive performance of broiler breeders. For this purpose, 150 hens and 20 roosters at 40 weeks of age, divided into two groups were receiving standard formula for broiler parents and to the test group feed VemoHerb Tribens of 250 g/t feed has been added. Three times during the 95-day experimental period 260 eggs of the control group and 260 eggs of the test group were incubated: during the 11-day preparatory period, while the birds of the two groups weren’t getting VemoHerb Tribens; one month after receiving of the product and two months after its application.

Fertility of the eggs

In the preparatory periods the fertility of the eggs in the control and experimental group is much closer and is respectively 96.9% and 95.4%, in this indicator the groups are practically equal. At the end of the experiment, this index began to decrease and the decrease is greater in the control group compared to the experimental. Fertility of the eggs in the control group is 90.8%, while in the experimental group is 94.6 percent – a difference of 3.8 percentage units in the favor of the experimental group. Within the group which hasn’t been receiving VemoHerb  Tribens during the trial between the beginning and end of the experiment there was a decrease of 6.1 % units in the fertility of eggs while in the breeding flock which has been receiving from the tested product it remains virtually at the same level. At the end of the study fertility of the eggs in the group receiving VemoHerb Tribens is higher by 4.2% compared to the control group.

Unfertilized eggs

During the preparatory period, the number of unfertilized eggs in the control group is 8 and in the test one is 12 or respectively 3.08% and 4.62%. At the end of the experience after two months of treatment with VemoHerb Tribens the difference in terms of unfertilized eggs between the control and test group is most pronounced: 24 pieces against 14 or 9.23% against 5.38% in the experimental birds. Therefore, the percentage of fertilized eggs in the control group increased from 3.08% to 9.23% respectively at the beginning and the end of the experiment. The results of the third incubation showed that unfertilized eggs are 3.85% lower in the group with VemoHerb Tribens in comparison to the control group.

Hatchability

During the preparatory period hatchability was 88.1% and 88.3% or practically the same in both groups. After a two-month administration of the studied product, hatchability was 86% in the control group and 89.8% in the group with VemoHerb  Tribens. While in the preparatory period the hatchability in both groups was virtually identical, in the third incubation at the end of the study after the experimental birds had been receiving the tested additive for two months, the hatchability in the experimental group was 3.8% higher in comparison to the control.

Level of testosterone

At the end of the test period the testosterone levels in the blood serum of 10 male birds of the control group and 10 male birds of the experimental group were examined. The testosterone level in the control group is 0.197 ng/ml and 0.255 ng/ml in the test group. The data show 29.4% increase in testosterone in the group receiving 250 g/t feed VemoHerb Tribens as an additive to the combined feed for two months compared to the control birds.

Conclusion

The addition of VemoHerb Tribens to compound feed for broiler parents for 84 days in quantity of 250 g/t feed under the conditions of the experiment increases the fertility of eggs for breeding by 4.2%, decreases the unfertilized eggs with 3.85%, increase the hatchability with 4.4% and the testosterone level in  blood serum of the male birds with 29.4%.