Egyptian Poultry Science Journal最新文献

{"title":"RESPONSES OF BROILER CHICKS TO STARVATION PERIOD LENGTHS AND EFFECTS ON GROWTH PERFORMANCE, DIGESTIBILITY, CARCASS YIELD, BLOOD INDICATIONS AND ECONOMICS SHORT TITLE: FEED RESTRICTION AND ITS EFFECTS ON BROILER PERFORMANCE","authors":"Maha A Abd El Latif","doi":"10.21608/epsj.2022.279143","DOIUrl":"https://doi.org/10.21608/epsj.2022.279143","url":null,"abstract":"","PeriodicalId":11662,"journal":{"name":"Egyptian Poultry Science Journal","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76350251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EFFECT OF GENETICALLY IMPROVED ON PHYSIOLOGICAL, IMMUNE RESPONSE AND PRODUCTIVE PERFORMANCE IN NATIVE CHICKENS","authors":"N. Khalifa","doi":"10.21608/epsj.2022.266622","DOIUrl":"https://doi.org/10.21608/epsj.2022.266622","url":null,"abstract":"ABCTRACT: The present study evaluated to assess genetic variability in performance traits, Blood Parameters and immune competence by using biotechnological methods on two Egyptian broiler lines Cairo-B2 and Random breed control (RBC). A total of two thousand chicks, from the ninth generation from lines, were reared in four replicated rooms under the same conditions until 8 weeks of age. Live body weight was determined weekly for Cairo-B2 and Random breed control (RBC) until 8 weeks, Blood samples were collected at 4 weeks of age from 20 chicks from each line to determined Triiodothyronine(T3), thyroxine (T4), total protein (TP), total lipids (TL), hematocrit (Ht), and Insulin-like Growth Factor-1 (IGF-1), The primary immune response of 30 chicks per line to Sheep red blood cells (SRBC) antigens was injected at 4 weeks and repeated at 6 weeks of age. 40 chicks from each line were slaughtered to determined carcass characteristics, the Cairo-B2 line had significantly higher than RBC line in body weight, carcass, breast meat, neck and wings weights. The results were the RBC line had significantly higher T3 and IGF-1 than the Cairo-B2 line and there was no significant difference in T4, TP, TL and Ht between the lines. The RBC line had higher antibodies titers to SRBC than the Cairo-B2 line that was shown in each injection. We are concluded that selection for high body weight over many generations can negatively effect on the immune response and carcass weight.","PeriodicalId":11662,"journal":{"name":"Egyptian Poultry Science Journal","volume":"8 5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86653162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EFFECT OF CHROMIUM CHLORIDE OR L-CARNITINE SUPPLEMENTATION EITHER ALONE OR COMBINATION WITH VITAMIN C ON PRODUCTIVE PERFORMANCE OF GOLDEN MONTAZAH CHICKENS DURING THE SUMMER SEASON","authors":"M. Mousa, A. Khosht, A. eshra","doi":"10.21608/epsj.2022.269159","DOIUrl":"https://doi.org/10.21608/epsj.2022.269159","url":null,"abstract":": Two experiments were done in this experiment to evaluate the comparison of the use of chromium chloride (Cr) as CrCl3 and L-carnitine, either alone or in combination with vitamin C, during heat stress in the summer on the egg performance and egg quality. In each experiment, one hundred and twenty individual of a 28-week golden Montazah-layer hen, according to a completely randomized design were divided into four groups, each group had three replicates, and each replicate had 10 laying hens. Layers were housed in cages (one bird/cage) and at high ambient temperatures (day and night cyclic temperatures ranged from 28 to 42°C) throughout the 12-week trial period. Layers have been fed by commercial classes throughout the experiment with access to feed and water. In1st experiment, the treatments were Group 1 = control, (0 additives), group 2 = vitamin C, (250 mg/kg feed), group 3 = Cr, (400 mg/kg feed), group 4 = (Cr 400 mg/kg feed + vitamin C 250 mg/kg feed). In 2nd experiment were Group 1 = control, (0 additives), group 2 = vitamin C, (250 mg/kg feed),, group 3 = L-carnitine, (100 mg feed), group 4 = (L-carnitine 100 mg feed + vitamin C 250 mg/kg feed), The results indicated that groups supplementation of 400 mg (Cr) and 100 mg L-carnitine either alone or combination with 250 mg vitamin C /kg diet improving feed conversation, egg number, egg mass and egg production percentage compared with control group or vitamin C alone, while egg weight increased by using L-carnitine with vitamin C compared with other groups. Also results demonstrated feeding supplemental (Cr) and L-carnitine, either alone or in combination with vitamin C had no effect on egg length, egg diameter, egg shell thickness, egg shell weight but its increased albumen height (p<0.01). It can be concluded that supplementation of 400 mg (Cr/kg feed) and 100 mg L-carnitine /kg feed either alone or combination with vitamin C 250 mg /kg diet, improved production performance for Golden Montazah hens at 29- 40 weeks of age during the summer season.","PeriodicalId":11662,"journal":{"name":"Egyptian Poultry Science Journal","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76082113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF LOCAL DOMYATI DUCKS FED DIET ENRICHED WITH ORGANIC ZINC DURING SUMMER SEASON","authors":"A. Awad, A. El-Shhat, M. Abdelmaged, S. Shazly, hassan abdelhaleem, M. Ragab","doi":"10.21608/epsj.2022.264654","DOIUrl":"https://doi.org/10.21608/epsj.2022.264654","url":null,"abstract":": Heat stress (HS) induced a big economic loss in ducks industry owing to reduce bird’s productivity. Nutritional strategy could use to attenuate the negative impacts of HS in poultry, this study purposed to decrease these impacts by organic zinc (oZn) enrichment for ducks diet at summer season on eggs production and quality, physiological and hatching parameters, subsequent growth of hatched ducklings and economic evaluation. Totally, 360 birds of Domyati ducks (300 female and 60 male), aged 25-wks were arranged at four empirical groups (each at five repeats) in a completely randomized design. The first one was considered as control and consumed the basal diet, while the 2 nd up to the 4 th empirical groups were consumed the basal diet enriched with 40 , 80 and 120 mg oZn /kg respectively, through 25-37 weeks of age under summer season. The results indicated that, ducks fed diet enriched with oZn recorded a significant (P < 0.001) increase in egg number (EN), egg weight and mass and improve feed conversion than those fed the control diet through the entire period (25-37 wks-old). Egg quality not significantly affected due to treatments except for Haugh units score. Hatchability (%) of fertile eggs was (P < 0.01) improved by oZn enrichment with 80 and 120 mg /kg diet, while total embryonic mortality was decreased in comparison with the control. Both blood hemoglobin content and lymphocytes (L, %) were elevated (P < 0.001) by oZn enrichment compared to control group, while heterophils (H, %) and H/L ratio were (P < 0.001) decreased. Serum cholesterol and liver enzymes were lowered (P < 0.001) by oZn enrichment, while HDL was (P < 0.001) elevated. Ducks fed 120 mg oZn/kg diet had a significant improvement in economic evaluation parameters than other groups. Results indicated the possibility of enriching ducks diet with 80 up to 120 mg oZn /kg could be an advantage method to attenuate the negative impacts of heat stress and improve eggs productivity, physiological performance, hatching characteristics and economic evaluation of ducks during Egyptian summer season. organic zinc.","PeriodicalId":11662,"journal":{"name":"Egyptian Poultry Science Journal","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90266807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IMPACT OF IN-OVO INJECTION WITH DIFFERENT IRON FORMS ON HATCHABILITY TRAITS AND POST- HATCHING GROWTH PERFORMANCE OF SUDANY DUCKLINGS","authors":"Noha Abd El-Azeem, samah Abdel Rahman","doi":"10.21608/epsj.2022.264650","DOIUrl":"https://doi.org/10.21608/epsj.2022.264650","url":null,"abstract":": A total of 1050 Sudany duck eggs were used in this experiment. Eggs were divided randomly into 7 treatments with three replicates each to study the influence of iron in different forms In-Ovo injection on hatchability traits and post-hatch performance of Sudany ducklings. The first group (G1) was served as control, (without injection); the eggs in 2 nd (G2) and 3 rd (G3) groups injected with 0.1 and 0.2 ml saline solution contains 10 and 20 ppm Nano organic iron. The eggs in 4 th and 5 th groups were injected with 0.1 and 0.2 ml saline solution contains 10 and 20 ppm Nano inorganic iron. The eggs in 6 th group was injected with 0.1 saline solution contain 10 µg organic iron, while the eggs in 7 th group was injected with 0.1 ml saline solution contain 10 µg inorganic iron. The results indicated that, no significant differences of different forms of iron on hatchability traits. At hatch, ducklings hatched from eggs in groups G2 and G3 recorded significantly high values of A/G ratio, MDA and HDL. Ducklings hatched from eggs injected with different forms of iron had significantly higher values of plasma IGF 1 and T 3 hormone and lower values of LDL than the control group. Ducklings hatched from eggs in group (G6) resulted in significantly higher values of plasma RBCs, HB and heterophiles than the control group. Also, all treated groups had high values of plasma WBCs compared to control except G7. Duckling in G2,G5 and G6 gave high LBW at 12 and 16 weeks of age . Also, duckling in (G2) recorded significantly high values of BWG throughout the trial period. These results suggest that, pre incubation In-Ovo injection with different forms of iron improved some blood plasma constituents of chicks at hatch and enhance post-hatch productive performance of Sudany ducklings from hatching until 16 weeks of age","PeriodicalId":11662,"journal":{"name":"Egyptian Poultry Science Journal","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83692935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ASSESSMENT OF GROWTH, CARCASS TRAITS, AND SOME PHYSIOLOGICAL PARAMETERS OF BRONZE, AND WHITE TURKEYS (MELEAGRIS GALLOPAVO), AND THEIR CROSSES","authors":"El-Sayed M Abdel-Kafy, Sherif B Zayed, Fatma Behiry, Michael Gorgy, Mahmoud Ahmed, Samya E. Ibraheim","doi":"10.21608/epsj.2022.264656","DOIUrl":"https://doi.org/10.21608/epsj.2022.264656","url":null,"abstract":": Crossbreeding has the advantage of benefiting from the effect of heterosis. A current crossbreeding experiment was conducted using Black Bronze (BB) and Large White Converter (CC) turkeys. Artificial insemination of 40 mature hens of CC with 6 toms of BB, and 40 mature hens of BB with 6 toms of CC were used to obtain F1 of the two turkey crosses (CB and BC) respectively. A total of 160 poults of the four groups of turkeys were taken in the evaluation in this study. This evaluation included some growth and carcass traits, and some biochemical blood and oxidative profile parameters. It was noticed that the body weight at different ages was higher in the large white turkeys-Converter, CC group, and then the crossbreed BC (BB toms × CC hens) group. The means of daily weight gain (DWG) and feed intake (FI) at different periods of age were highly significant (P≤0.05) high in CC followed by BC and CB turkeys. Feed conversion (FC) reached the lowest values in CC while the BB genotype was having the highest values. The crosses showed significant values in percentages of carcass/live body weight compared to BB. The hind part of the carcass differed significantly (P≤0.05) among the four groups of birds regardless of other parts (neck, wing, and chest/carcass). Blood serum protein, glucose, urea, and albumin levels were not significantly affected by the genotype. However, globulin and triglyceride levels were affected significantly (P≤0.05) by the genotype. Oxidative profile parameters were affected significantly (P≤0.05) by the genotype. The crossbreeding parameters obtained showed that the additive effect was significant for DWG and FI during the periods from hatching to 24 weeks while it was not significant for FC. The additive effects were not significant for carcass traits, and biochemical blood profile parameters except for glutathione reductase and total antioxidant capacity. The cross effect was significant for DWG during the periods hatching-12, only. The cross effect in FI during the period from hatching to 24 weeks was significant while it was not significant in FC. The cross effects of the two reciprocal crosses were not significant in all carcass parameters and biochemical blood profiles. The oxidative profile was not significantly different in the cross effect except for hydrogen peroxide (HP) and; malondialdehyde. Presumably, the crossbreeding between large white Converter turkeys with Bronze turkeys was to benefit from the effect of heterosis. The crosses have a growth performance and carcass traits higher with a relative growth advantage when the hens were Hybrid Converters. The first generation in crossbreeding could be submitted to selection for the constitution of a synthetic strain.","PeriodicalId":11662,"journal":{"name":"Egyptian Poultry Science Journal","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86669462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EFFECT OF GRADED LEVELS OF BIOCHAR SUPPLEMENTATION AS A GROWTH PROMOTER ON PRODUCTIVE AND PHYSIOLOGICAL PERFORMANCE OF BROILER CHICKS","authors":"A. Elnaggar, O. Elghalid, Abdelaal Elsayed, Ahmed Harfoush","doi":"10.21608/epsj.2022.263846","DOIUrl":"https://doi.org/10.21608/epsj.2022.263846","url":null,"abstract":": This study aimed to determine the effects of graded amounts of biochar supplementation on broiler chick production index, lipid profile, biomarkers of antioxidant status, carcass characteristics, and economic efficiency. A total of 216, seven-day-old, unsexed broiler chicks ( Arbor Acres ) were divided into six experimental groups (36 chicks each), each with six replicates (6 chicks each). The first group was fed the basal diet and served as control; while the 2 nd , 3 rd , 4 th , 5 th , and 6 th groups were fed the basal diet supplemented with 1, 2, 4, 6, and 8 % biochar, respectively. According to the data, treatment groups that added biochar levels of 1, 2, 4, and 6 % outperformed the control group in terms of productivity, economic efficiency, and production index. While it was at the same previous levels, total lipids, triglycerides, cholesterol, low-density lipoprotein (LDL), and malondialdehyde (MDA) were lowered. When compared to the control group, there were higher levels of glucose, thyroid hormones (T3-T4), high-density lipoprotein (HDL), total antioxidant capacity (TAC), and glutathione peroxidase (GSH-Px), and superoxide dismutase (SOD) (within normal range). In conclusion, it can be concluded that adding biochar to the diet at levels of 1, 2, 4, and 6 % improved the physiological status and growth performance of broilers without having any negative impacts on the blood parameters of broiler chicks.","PeriodicalId":11662,"journal":{"name":"Egyptian Poultry Science Journal","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86632126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EFFECT OF INCLUSION DRIED YELLOW EARTHWORM MEAL (TENEBRIO MOLITOR) ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF JAPANESE QUAIL 1-REPLACEMENT OF BASAL DIET DURING THE GROWING PERIOD","authors":"M. Morsy","doi":"10.21608/epsj.2022.264652","DOIUrl":"https://doi.org/10.21608/epsj.2022.264652","url":null,"abstract":": The purpose of this study was to investigate the effect of partially replacement the yellow mealworm (Tenebrio Molitor, YMW) of Japanese quail basal diet on productive performance during 1-42 days of age. Three hundred and fifty unsexed one-day-old chicks were randomly assigned to one of five food treatments (7 pens per treatment, 10 birds per pen) and reared on battery brooders in wire cages (55×50×35 cm) with individual feeders and drinks. A basal control diet (24 % crude protein, CP; 2970 Kcal/kg) was fed to the first group. The 2 nd , 3 rd , 4 th and 5 th treatments were supplied with YMW (2.5, 5.0, 7.5, and 10.0%, respectively), replacing the basal diet. Throughout the experimental period quails were provided feed and water ad-libitum . The results indicated that the dry matter of YMW continued 61.5% CP and 21.19 % ether exact (EE). The content of essential amino and fatty acids of YMW as a percentage of CP and EE was higher than that content on the fish and soybean meal. Replacement with 10.0% of YMW maximized both of body weight and gain and improvement the feed conversion ratio compared with control group. Increasing the replacement percentage of YMW significantly increased the carcass, meat quality, and the content of some amino acids and saturated fatty acids. The inclusion of YMW, significantly decreased total cholesterol and triglyceride concentrations and the high lipoprotein concentration, biochemical and immunity statues were significantly improved. In conclusion, replacing YMW up to 10.0% of the Japanese quail diet is acceptable and has no adverse effect on growth and productive performance and immunity states.","PeriodicalId":11662,"journal":{"name":"Egyptian Poultry Science Journal","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88306724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EFFECT OF LIGHTING REGIMENS,LEVELS AND SOURCES OF DIETARY IODINE ON SEMEN QUALITY, YOLK IODINE CONTENT AND CHICKS QUALITY TRAITS OF MANDARAH CHICKENS STRAIN","authors":"Ebtsam El Iraqi, A. El-Prollosy","doi":"10.21608/epsj.2022.264655","DOIUrl":"https://doi.org/10.21608/epsj.2022.264655","url":null,"abstract":": A total of 400 females and 400 males of Mandarah strain at 6 weeks old were transferred to an environmentally controlled light proof house. The controlled house are divided inside into four separate partition. They were distributed to the partitions according to the photoperiod regimen, since female chicks were placed in the first and third partition, while the males were placed in the second and fourth partition (200 chicks / partition with two sources of iodine (organic, inorganic ) inside each source two levels (0 .5 , 2 ) with 5 replicate for each treatment with 10 chicks in each replicate). Chicks in the first and second partition exposed to Step-up photoperiod (SUP):The photoperiod was increased gradually from 10 h/d at 8 weeks by half an hour each wk to reach 16-h/d at 20 wk of age. While, the chicks in the third and fourth partition exposed to Constant step-up photoperiod (CSUP): The photoperiod was kept constant at 12-h/d at 8 weeks of age until 16 wk of age and increased gradually by an hour each wk to reach 16-h/d at 20 wk of age . Chicks in each lighting regimen are divided equally into four groups ( 50 birds with 5 replicate) to receive one of the following dietary experiment : basal diet supplemented with 0 .5 (T1), 2 (T2) mg inorganic iodine (Potassium iodide) / Kg diet , 0 .5 (T3) , 2 (T4) mg organic iodine (I-enriched yeast) / Kg diet. Results showed that SUP regimen (Lr1) increased (P≤0.05) egg weight,eggshell thickness,haugh units, iodine content in egg yolk , semen quality, fertility, hatchability (%), chick quality traits, corticosterone and testosterone hormones compared with CSUP (Lr2). Also, organic iodine enhanced (P≤0.05) egg weight,eggshell thickness,haugh units, iodine content in egg yolk , semen quality, fertility, hatchability (%), chick quality traits, T3,T3/T4 ratio, corticosterone and testosterone hormones compared with inorganic iodine. Moreover, 2mg iodine/kg diet increased (P≤0.05) iodine content in egg yolk , thyroid hormones and decreased concentration of corticosterone hormone. In conclusion, providing SUP regimens for closed houses from 8-20 weeks birds age with 2mg organic iodine/kg diet could increased egg quality traits, the iodine content of yolk eggs, semen quality, chick quality traits, thyroid, corticosterone and testosterone hormones .","PeriodicalId":11662,"journal":{"name":"Egyptian Poultry Science Journal","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76127709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IMPROVING THE UTILIZATION OF BROILER LOW PROTEIN DIETS USING TYROSINE, TRYPTOPHAN, CITRIC ACID AND SULPHATE","authors":"hemat Abdel Magied, Mohamed Ali, Amany H. Waly, H. Habib","doi":"10.21608/epsj.2022.264649","DOIUrl":"https://doi.org/10.21608/epsj.2022.264649","url":null,"abstract":": The aimed of this study evaluate the ability of tyrosine, tryptophan, citric acid (CA) , sodium sulphate (SS) or their mixture to improve the utilization of broiler low protein diets (LP diet). A total number of 270 Cobb broiler 10 day old were randomly distributed into nine groups received basal diet (control), diet containing 2 percentage points Anhydrous sodium sulphate (SS) , LP+0.3 % CA + 0.3 % SS, LP+ 0.05% tyrosine , LP +0.05% tyrosine + 0.3 % CA +0.3 % SS, LP+0.05% tryptophan and LP+0.05% tryptophan +0.3 % CA + 0.3 % SS. At 21 day, using LP diet significantly decreased broiler body weight compared to control diet while all feed additives improved weight gain and feed conversion compared to LP diet. The birds fed mixture of tyrosine +CA+SS recorded the highest value of body weight and the best feed conversion. At 35 day, The birds fed mixture of tyrosine +CA+SS recorded significantly higher body weight value and better feed conversion by 8.63 and 8.53 %, respectively, compared to those fed control diet . Compared to other treatments, birds fed mixture of tyrosine +CA+SS recorded the highest values of total protein, albumin and total cholesterol in plasma. It can be concluded that addition of tyrosine, tryptophan, CA or SS to LP diet improved the broiler performance to be like those fed control diet while the mixture of tyrosine +CA+SS surpassed the control.","PeriodicalId":11662,"journal":{"name":"Egyptian Poultry Science Journal","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84570866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}