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1

The effect of dietary propolis supplementation on the growth performance of broiler chickens

100%
Kleczek K., Wilkiewicz-Wawro E., Wawro K., Makowski W., Murawska D., Wawro M.
Polish Journal of Natural Sciences
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2014
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tom 29
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nr 2
The experimental materials comprised 400 Ross 308 chickens (200 ♂ and 200 ♀), divided randomly into four groups kept in 16 pens, as follows: a negative control group (I) – a diet without additives, a positive control group (II) – a diet supplemented with a combination of the antibiotic growth promoter flavomycin (10 mg kg⁻¹ feed) and the coccidiostat robenidine (500 mg kg⁻¹ starter and grower feed), and two experimental groups – diets supplemented with chemically standardized propolis – 10 mg kg⁻¹ feed in group 3 and 50 mg kg⁻¹ feed in group IV. The body weights of chickens were determined once a week. Feed intake, mortality and culling rates were monitored regularly. At the end of the experiment, on day 42, 12 chickens (6 ♂ and 6 ♀) were selected from each group for slaughter and carcass quality analysis. The final body weights of chickens, feed intake (kg) per kg body weight and carcass weight during the rearing period did not differ significantly between groups. The lowest feed intake per kg lean meat was noted in chickens fed a diet with 50 mg propolis/kg feed (3.457 kg), and the highest – in broilers fed a diet with 10 mg propolis/kg feed (3.611 kg). The weight of carcass and selected carcass parts (neck, breast, legs) tended to increase in chickens that received propolis, although the noted differences were statistically non-significant. The percentage content of legs in the carcass was significantly lower in chickens fed a diet with an antibiotic growth promoter (AGP). The legs of chickens fed 50 mg propolis had a significantly higher muscle content and a lower fat content, compared with the legs of birds fed a diet with AGP.
2

Effect of extract of grapefruit seeds and baikal skullcap root on chemical composition and sensory traits of female turkey meat

84%
Rusinek-Prystupa E., Szkucik K., Pisarski R. K., Gondek M.
Electronic Journal of Polish Agricultural Universities. Series Food Science and Technology
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2014
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tom 17
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nr 1
3
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Effect of dietary probiotic containing Lactobacillus bacteria, yeast and yucca extract on the performance and faecal microflora of broiler chickens

67%
Biernasiak J., Slizewska Z., Libudzisz Z., Smulikowska S.
Polish Journal of Food and Nutrition Sciences
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2007
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tom 57
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nr 4[A]
19-25
The experiment was carried out on 99 female broilers, allocated to 3 groups of 33 birds, kept in individual cages. A wheat- and soyabean mealbased diet was formulated and divided into 3 batches: P (supplemented with a probiotic composed of lactic acid bacteria, yeasts and yucca extract), A (supplemented with flavomycin) and C (unsupplemented). Diets were fed from day 1 to 41 of life. Final BW was on average 2.4 kg in all groups, FCR was 1.63 kg feed/kg BWG, neither BWG nor FCR nor mass of the liver, pancreas and gastrointestinal tract were significantly influenced by supplementing the diet with either additive. Special attention should be drawn to the fact that supplementing feeds with a probiotic preparation already after one week of breeding considerably decreased the number of Clostridium bacteria in broilers’ faeces. Nevertheless, it should be emphasized that in the hereby research excreta of chickens fed with the feed mixed with a probiotic contained the lowest changeability of the number bacteria of Enterobacteriaceae family and bacteria belonging to coli group in individual weeks of breeding. It may be concluded that the studied probiotic can be considered to be a substitute for antibiotic growth promoters in broiler diets.
4

The chemical composition of muscles and sensory traits of meat in broiler chickens fed herbs substituted for antibiotic growth promoter

67%
Pisarski R. K., Szkucik K., Zieba M.
Herba Polonica
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2007
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tom 53
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nr 3
The effect of dried herbs (2%) substituted for antibiotic growth promoter (AGP) in compound feeds for broiler chickens was investigated. Nettle, pansy, lemon balm, lime tree and mint, compared to the control birds given AGP, did not affect broilers body weight significantly whilst hop cone depressed weight gain remarkably. None of examined herbs decreased the content of crude protein (CP) in a breast muscle, whereas CP in leg muscle was adversely influenced by hop cone supplement. The herbs, compared to AGP, decreased the content of ether extract (EE) in breast muscle and had no effect on EE level in leg muscles. With respect to leg muscle, the only exception was hop cone. Examined herbs had an adverse effect on meat sensory traits: odour intensity and desirability as well as palatability.
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