Thesis

The use of some medicinal plants as feed additives in broiler diets

Alexandria University, Poultry production
Thesis for: Ph.D, Advisor: Mohamed assar
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    ABSTRACT: This study was conducted to investigate the effects of using Eucalyptus , Pamegranate , Tilia and Thyme as natural biological feed additives on growth performance, carcass traits, blood constituents and economical efficiency of broiler chicks. Two hundred and seventy unsexed Arbor-Acres broiler chicks at one week of age were divided into nine treatments (30 bird each); each treatment contained 3 replicates of 10 birds each. The experimental treatments were: Treatment 1 the control diet (free from medicinal and aromatic plants). Treatments 2 and 3 the control diet + 0.1 and 0.2% Eucalyptus(E). Treatments 4 and 5 the control diet + 0.1 and0.2 % Pamegranate(P). Treatments 6 and 7 the control diet + 0.1 and 0.2% Tilia(T). Treatments 8 and 9 the control diet + 0.1 and 0.2% Thyme(Th). Chicks fed the diet supplemented with E at the level of 0.1% had the highest values of LBW at 28 and 42 days of age. In general, adding medicinal aromatic plants (MAP) to the control diets improved live body weight gain (LBWG). Chicks fed the diet supplemented with E at the level of 0.1% had the highest values of LBWG at starteing and total period. Chicks fed the diets supplemented with Th at the level of 0.2% and 0.1% had the lowest feed intake (FI) during the periods from 7 to 28 and 7 to 42 days of age. Feeding MAP had no significant effects on feed conversion (FC), carcass characteristics or plasma constituents. Feeding MAP significantly affected moisture (P0.05) and ash (P0.01)% of broiler meat. However, insignificant differences were observed in protein, fat and NFE% of meat. Carcass part significantly influenced (P0.01) protein, fat and ash % of broiler meat. Chicks fed diet supplement with E at the level of 0.1% had higher growth rate (GR) at the two periods. Obtained results indicated that mortality % decreased in chicks fed starter and finsher diets supplemented with MAP additives. Economical efficiency: EEF values at 6 weeks of age improved in chicks fed the diets supplemented with MAP additives (except T 0.1 % and Th 0.1 %) as compared with unsupplemented one. It
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    ABSTRACT: This study was conducted to evaluate the effect adding of Saccharomyces cerevisiae , Bacillus subtilis and Bacillus licheniform, black seed oil versus, virginamycin and zinc bacitracin to growing chick's diets at level of 0.1%, for each. Growth performance, digestibility, carcass treats, meat composition, serum blood constituents and economical efficiency of growing chicks were studied. A total of 180 unsexed one-day old chicks, were divided into 6 treatments of 30 chicks each in three replicates. The experiment was terminated when chicks were 12 weeks of age. The results showed that, addition of black seed oil, Saccharomyces cerevisiae and Bacillus subtilis and Bacillus licheniform in the experimental diets increased body weight, body weight gain. Chicks fed diets supplemented with black seed oil and virginamycin were significantly lower in their feed consumption. While, Chicks fed diet supplemented with saccharomyces cerevisiae consumed the highest amount of feed. The best feed conversion ratio was recorded with chicks fed diets contained black seed oil or virginamycin. All the treatments insignificantly affected dressing, giblets percentages, composition of breast Meats and blood serum constituents as compared with those of the control. Chicks fed diets supplemented with either black seed oil, virginamycin or Bacillus subtilis and Bacillus licheniform had significantly decreased abdominal fat percentages. The Addition of Saccharomyces cerevisiae, black seed oil and Bacillus subtilis and Bacillus licheniform significantly improved digestibility coefficient of dray matter and crude protein. The best relative economical efficiency was recorded by black seed oil flowed by virginamycin addition. It was concluded that black seed oil, Bacillus subtilis and Bacillus licheniform and Saccharomyces cerevisiae, could serve in growing chicks diets. However, further research is required to better understand the role of natural feed additives in poultry nutrition and their implications in human health.
    International Journal of Poultry Science. 01/2008;
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    ABSTRACT: To monitor the effects of various levels of methanolic extract of Peganum harmala (P. harmala) on liver function in broilers birds, 28-days feeding trial involving 240 one-week old broiler chicks was carried out. The birds were grouped into four dietary treatments of -0, 200,250 and 300 mgL -1 of drinking water, which were further replicated 6 times in completely randomized design. Standard management practices were adopted, feed and water were offered ad libitum. At the end of every week, one bird was randomly selected from each replicate, bled to aspirate blood for liver enzymatic activities i.e. Alanine transaminase (ALT), Asparate aminotransferase (AST), Alkaline phosphatase (ALP) and serum protein determination. The liver enzymes i.e. ALT, AST and ALP showed gradual reduction in their concentration under different level of P. harmala methanolic extract. Significantly lower (P<0.05) values for ALT were found for the group Ph-250 except at day-14, where it was significantly low for group Ph-200. The AST levels were significantly (P<0.05) decreased in treated groups as compared to control at all recorded stages. The minimum values were recorded for group Ph-250 at day-14 and 35, while at day-21 and 28 no significant change was observed among the treated groups. The ALP level was significantly (P<0.05) lower in treated groups at all recorded stages. No significant change was observed in serum protein of broiler chicks at any recorded stage. It is concluded that methanolic extract of P. harmala at the dose rate of 250 mgL -1 drinking water may be used to improve serum hepatic parameters in broiler chicks.
    Pakistan journal of science 04/2012; 64(1).

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