he experimental work of the present study was carried out at El-Takamoly Poultry project (TPP), Fayoum Governorate, Egypt, during the period from March to July 2014. This study was undertaken to assess the dietary effects of essential oil blend (EOB), mannan oligosaccharides (MOS) and their combination on the productive performance of Golden Montazah laying hens at late egg production period. A total number of 720 laying hens plus 72 males of Golden Montaza at 56 weeks of age were allocated randomly into six treatments groups (120 hens plus 12 males), each group was equally subdivided into three replicates (40 hens plus four males). Birds were distributed into 18 pens (40 hens and four males each) in such order to have a similar mean body weight and average daily egg production. The dietary treatments used in this study were as follows: 1-Birds were fed the control diet (diet 1). 2-diet 1 + 200 mg prepared essential oil blend (PEO)/kg diet. 3-diet 1 + 100 mg commercial essential oil blend (CEO)/kg diet. 4-diet 1 + 500 mg MOS/kg diet. 5-diet 1+ 200 mg PEO + 500 mg MOS/kg diet. 6-diet 1 + 100 mg CEO + 500 mg MOS/kg diet.Results obtained could be summarized in the following: Laying hens fed diet containing 100 mg CEO + 500 mg MOS/kg diet had significantly higher values of egg production (EP%), live body weight change (LBWC) and the best feed conversion (FC), crude protein conversion (CPC) and caloric conversion ratio (CCR) during all significant periods studied, while, laying hens fed control diet had significantly lower values of EP%, LBWC and the worst FC, CPC and CCR during the same periods. No significant effect were observed for egg mass, feed intake, initial body weight, final body weight and mortality rate% during the experimental period. There were insignificant differences among all dietary treatments in carcass characteristics except, spleen%. Laying hens fed diet containing 100 mg CEO +500 mg MOS/kg diet had higher spleen% whereas, those fed control diet had lower spleen% at the end of experimental period. Laying hens fed diet containing 100 mg CEO + 500 mg MOS/kg diet had significantly higher values of lactic acid bacteria count and the lower values of total count of bacteria and E-coli, while, those fed control diet had significantly higher values of total count of bacteria and E-coli and the lower values of lactic acid bacteria count. Golden Montazah laying hens fed diet containing 100 mg CEO +500 mg MOS/kg diet gave the best economical and relative efficiency values during the period from 56 to 72 weeks. In conclusion, the results of this study indicated that feeding Golden Montazah laying hens on diets containing 100 mg CEO +500 mg MOS/kg diet improved the productive performance and relative economic efficiency values of laying hen during the period from 56 to 72 weeks of age.
Chemical analyses were performed in the laboratories of the same Department.The experiment was conducted during the period from March to April 2005. The effect of substituting yellow corn by some by-products of medicinal and aromatic plants with or without enzyme supplementation was studied on growing Japanese quail performance. Fourteen dietary treatments were designed to study the effects of substituting yellow corn by some by-products of medicinal and aromatic plants with or without enzyme supplementation. The by-products were parsley, dill and peppermint.Live body weight (LBW) and Live body weight gain (LBWG): Quails fed diet 10 (parsley BP replacing 16% YC + 0.1% KD) had higher LBW at 38 days of age and LBWG during the period from 10 to 38 days of age. Quails fed diet 13 (peppermint BP replacing 16% YC) had lower LBW at 38 days of age and LBWG during the period from 10 to 38 days of age. Quails fed diet 11 (peppermint BP replacing 8% YC) had heavier LBW at 45 days of age and LBWG during the period from 10 to 45 days of age. Quails fed control diet had lower LBW at 45 days of age and LBWG during the period from 10 to 45 days of age.Feed intake (FI): Quails fed diet 2(control + 0.1% KD) had significantly lower FI during the periods from 10 to 38 and 10 to 45 days of age. Feed conversion (FC), Crude protein conversion (CPC) and Caloric conversion ratio (CCR):Quails fed diet 8 (parsley BP replacing 8% YC + 0.1% KD) had the best FC and CCR values during the period from 10 to 38 days of age, quails fed diet 2 (control + 0.1% KD) had the best CPC value during the same period (10 to 38 days of age). Quails fed diet 2 (control + 0.1% KD) had the best FC, CPC and CCR values during the period from 10 to 45 days of age, followed by those fed diet 14 (peppermint BP replacing16%YC+0.1% KD) during the same period. Quails fed diet 5 (dill BP replacing 16% YC) had the worst FC, CPC and CCR values during the periods from 10 to 38 and 10 to 45 days.Performance index (PI): Quails fed diet 8 (parsley BP replacing 8% YC + 0.1% KD) had significantly higher PI during period from 10 to 38 days of age. Quails fed diet 2
his research was conducted to study the effect of inclusion of sugar beet pulp (SBP) in the diets on the performance of Gimmizah laying hens during the period from 9 to 27 weeks of age. Hens were previously fed with starter diets from the beginning of the 3 weeks up to 8 weeks, and then hens fed in the present study on grower diets from the beginning of 9 up to 19 weeks, pre lay diets from the beginning of 20 up to 23 weeks and layer diets from the beginning of 24 up to 27 weeks. At the beginning of 9 weeks, a total of 180 females were continue feeding on the same treatments (which its fed in the starter period), which, consisted of five levels of SBP (0, 5, 10, 15 and 20% SBP) until 27 weeks (five treatments/four replicates (9 pullets/ replicate)). Hens fed diet containing 5% SBP had significantly higher live body weight (LBW) at the beginning of 9 weeks, performance index (during the period from 9 to 19 weeks) and recorded better values of feed conversion ratio (FC), crude protein conversion (CPC) and caloric conversion ratio (CCR) during the period from 9 to 19 weeks. Birds fed the control diet had higher LBW at 19 weeks and body weight gain, during the period from 9 to 19 weeks. Hens fed diet containing 10% SBP consumed significantly higher feed intake (FI), during the period from 9 to 19 weeks. Also, hens fed 10% SBP reached to sexual maturity earlier than the other treatments (the early in age at sexual maturity is coincided with a significant increase of average egg number (EN) per hen and laying rate% during the period from day of laying first egg until 23 weeks). Hens fed diet containing 20% SBP had significantly higher values of egg weight and FI, and the lower values were recorded with the hens fed diet containing 0.0% SBP during the period from 24 to 27 weeks of age. Gimmizah laying hens fed diet containing 0.0% SBP had better values of CPC and CCR during the period from 24 to 27 weeks of age, but, the differences between 0, 5, 10 and 15% SBP were not significant. The worst corresponding values of CPC and CCR were recorded with the hens fed diet containing 20% SBP during the period from 24 to 27 weeks of age. Feeding different levels of SBP insignificantly affected EN, egg production, FC and egg quality during the period from 24 to 27 weeks of age. It could concluded that, SBP could be used at a rate of 10% in the growing (9 to 19 weeks), pre-lay (20 to 23 weeks) and layer (24 to 27 weeks) diets of Gimmizah laying hens without any adverse effects on the pullet or hen performance and egg quality. But, the inclusion of SBP at 20% in the diet resulted in poor performance.
his experiment was conducted to study the effect of using two levels of (recommended (R), R-2%) crude protein (CP) supplemented with or without the requirements of methionine and lysine (Met. and Ly.) and each with two levels (0.00 and 0.10%) of Avizyme 1500 in 2 x 2 x 2 factorial arrangement (giving eight dietary treatments) on growth performance of broiler chickens (Ross strain). Accordingly, a total numbers of 192 one-day old unsexed Ross broiler chickens were initially fed a control diet for five days. At six days of age, chicks were randomly allotted to the dietary treatments, birds were divided into eight treatments (24 birds each), each treatment contained three replicates of eight birds each. Results obtained could be summarized in the following: The main effects of level of CP had insignificant effect on live body weight (LBW), live body weight gain (LBWG), feed intake (FI), feed conversion (FC) and performance index (PI) during finisher (25 to 41) and overall experimental periods (6 to 41 days). Level of CP had significant effect on crude protein conversion (CPC) during the period from 6 to 41 days, chicks fed diet containing R had the worst CPC during same period. Chicks fed adequate amounts of amino acids (AA) supplement diets recorded significantly higher PI value during the period from 6 to 41 days, while, recorded significantly the worst values of FC and CPC during the same period. Level of AA had insignificant effect on LBW, LBWG and FI during overall experimental period. Neither enzyme addition nor interaction between level of CP, AA and enzyme addition had any significant effect on LBW, LBWG, FC, CPC and PI during the period from 6 to 41 days. No significant differences due to level of CP or AA on blood constituents, except, red blood cells count (RBCs) which was significantly affected. Chicks fed diet containing R-2% CP or diet containing inadequate amounts of AA had higher value of RBCs. No significant differences due to enzyme addition and interaction effect of dietary treatments on blood constituents, except, interaction effect on neutrophils% (segment) which was significantly affected. Neither level of CP and enzyme addition nor interaction between level of CP, AA and enzyme addition had any significant effect on slaughter parameters% and tibia weight and ash% at the end of the finishing period. Level of CP, AA and interaction between level of CP, AA and enzyme addition had insignificantly affected chemical composition of broiler meat. Chicks fed diet containing R-2% supplemented with the requirements of Met. and Ly. with 0.10% of Avizyme had the best economical and relative efficiency values during the period from 6 to 41 days of age, as compared with those fed the control diet and other treatments. It can be concluded that, CP can be reduced from the recommended level by 2% and supplement these diets with either Met. and Ly or Avizyme without affecting performance. Besides, using such diets reduces feed cost and N pollution.
his research was conducted to study the impact of using two levels of ME (recommended (R) and R-150 Kcal/Kg diet) and each with four type of addition (without Se or choline supplementation, 0.1 mg Se/Kg diet in the form of organic Se as Sel-Plex (Se yeast), 0.10% of choline and 0.05 mg Se/Kg diet + 0.05% choline in 2 x 4 factorial arrangement (giving eight dietary treatments) on growth performance of Cobb broiler chickens. Accordingly, a total number of 192 one-day old unsexed Cobb broiler chickens were firstly fed a control diet for five days. At six day of age, chicks were randomly allotted to the dietary treatments, birds were divided into eight treatments (24 birds each) and each treatment contained three replicates (eight birds each). Results obtained could be summarized in the following: Performance: Chicks fed diet containing recommended level of ME (R)-150 Kcal/Kg diet had significantly higher values of LBW at 41 days and LBWG, FI, GR, PI during the period from 6 to 41 days, while, chicks fed diet containing R had significantly lower values during the same previous periods. Chicks fed R-150 Kcal/Kg had the best FC, CPC and CCR during the period from 25 to 41 days, and those fed R-150 Kcal/Kg had the best CCR during the period from 6 to 41 days. Type of addition and interaction due to level of ME effect X type of addition (experimental treatments) had insignificant effect on LBW, LBWG, FC, CPC, CCR, GR and PI during the periods from 25 to 41 and 6 to 41 days (finisher and over all experimental period). Chicks fed diet containing R with 0.05 mg Se/Kg diet and 0.05% choline had higher value of FI during the period from 6 to 41 days. Slaughter parameters% and blood constituents: neither level of ME, type of addition nor interaction due to level of ME effect X type of addition had any significant effect on slaughter parameters% and blood constituents except, type of addition with dressing% and bursa, which was significantly affected. Chicks fed diet containing 0.1 mg Se/Kg diet as Sel-Plex had higher value of dressing percentage. Also, interaction due to level of ME effect X type of addition, which was significantly affected of total leucocytes. Chicks fed diet containing R-150 Kcal/Kg diet with 0.1% choline had higher value of total leucocytes at the end of the experiment. GSH-PX activity were significantly (P≤0.01) affected by level of ME and type of addition, chicks fed 0.1 mg Se/Kg diet as Sel-Plex had higher value of GSH-PX at 41 days. Chemical composition of broiler meat: Level of ME, type of addition and interaction due to level of ME effect X type of addition had insignificant effect on chemical composition of broiler meat, except, moisture %, which was significantly affected. Economic efficiency (EEf): EEf values during the period from 6 to 41 days of age improved in chicks fed all experimental diets, except, chicks fed diet containing recommended level of ME with 0.05 mg Se/Kg diet as Sel-Plex plus 0.05% choline (the lowest corresponding values, being 0.126 and 95.74%, respectively), as compared with...
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