Pub Date : 2017-12-01DOI: 10.21608/EJSGS.2017.26308
H. Mohameda, M. Mohamed, K. Ibrahim, F. A. Ghany, A. Mahgoup
ABSTRACTThis study conducted to evaluate the effect of zinc element, either in Large particles (LP-Zn) or Nano particles (NP-Zn)] forms, as a feed supplement in rations of Ossimi ewes on feed intake, digestibility, feeding value, milk yield and offspring performance. Fifteen ewes used before lambing. They averaged 39.37±0.64 kg live body weight and aged 3-4 years. Animal allotted randomly into three similar groups (5 animals each) to receive one of the experimental diets. The control ration (CR) consisted of concentrate feed mixture (CFM), Berseem hegazi hay (BHH) and rice straw (RS). The two tested groups fed the same control ration supplemented either with 10 mg large size particles of zinc (LP-Zn) or 5 mg nano particles of zinc (NP-Zn) per kg CFM, G2 and G3 respectively.Results indicated that digestibility of most nutrients (DM, OM, CF and NFE) were significantly the highest with NP-Zn ration in comparison with other treatments. Similar trends observed with TDN and DCP values among treatments. Percentage of body weight changes during experimental period increased (P<0.05) by 4.96 and 12.54 % for ewes treated by LP-Zn and NP-Zn, respectively. In addition, the feed intake calculated as DMI, TDN and DCP were significantly higher with NP-Zn ration than other ones. Actual daily milk yield (ADMY) and 6% fat corrected milk yield (FCMY) were higher for both tested rations (LP-Zn & NP-Zn) than control, with superiority of NP-Zn ration. Data indicated that supplementation of diet with NP-Zn affected positively (P<0.01) the total antioxidant capacity (TAC), glutathione-S-transferase (GST) activity, prolactin, triiodothyronine (T3), and thyroxin (T4) concentrations at 15, 45 and 75 days post-lambing in comparison to control group for ewes and their lambs. Also, concentration of immunoglobulin (IgG) in serum samples of ewes and their lambs recorded the highest values with NP-Zn group. Serum total protein, albumin, globulin and glucose values in NP-Zn group recorded the highest values, followed by LP-Zn group, while control group had the lowest, either for ewes or suckling lambs. Serum AST, ALT and urea measurements were within the normal range for healthy sheep.It conclude that small amount of zinc in nano size, could replace zinc in normal size without any side effects on animal performance. In addition, zinc supplementation could improve nutrients digestibility, feed conversion, milk production and some related serum biochemical indicators.
{"title":"IMPACT OF NANO-ZINC OXIDE SUPPLEMENTATION ON PRODUCTIVE PERFORMANCE AND SOME BIOCHEMICAL PARAMETERS OF EWES AND OFFSPRING","authors":"H. Mohameda, M. Mohamed, K. Ibrahim, F. A. Ghany, A. Mahgoup","doi":"10.21608/EJSGS.2017.26308","DOIUrl":"https://doi.org/10.21608/EJSGS.2017.26308","url":null,"abstract":"ABSTRACTThis study conducted to evaluate the effect of zinc element, either in Large particles (LP-Zn) or Nano particles (NP-Zn)] forms, as a feed supplement in rations of Ossimi ewes on feed intake, digestibility, feeding value, milk yield and offspring performance. Fifteen ewes used before lambing. They averaged 39.37±0.64 kg live body weight and aged 3-4 years. Animal allotted randomly into three similar groups (5 animals each) to receive one of the experimental diets. The control ration (CR) consisted of concentrate feed mixture (CFM), Berseem hegazi hay (BHH) and rice straw (RS). The two tested groups fed the same control ration supplemented either with 10 mg large size particles of zinc (LP-Zn) or 5 mg nano particles of zinc (NP-Zn) per kg CFM, G2 and G3 respectively.Results indicated that digestibility of most nutrients (DM, OM, CF and NFE) were significantly the highest with NP-Zn ration in comparison with other treatments. Similar trends observed with TDN and DCP values among treatments. Percentage of body weight changes during experimental period increased (P<0.05) by 4.96 and 12.54 % for ewes treated by LP-Zn and NP-Zn, respectively. In addition, the feed intake calculated as DMI, TDN and DCP were significantly higher with NP-Zn ration than other ones. Actual daily milk yield (ADMY) and 6% fat corrected milk yield (FCMY) were higher for both tested rations (LP-Zn & NP-Zn) than control, with superiority of NP-Zn ration. Data indicated that supplementation of diet with NP-Zn affected positively (P<0.01) the total antioxidant capacity (TAC), glutathione-S-transferase (GST) activity, prolactin, triiodothyronine (T3), and thyroxin (T4) concentrations at 15, 45 and 75 days post-lambing in comparison to control group for ewes and their lambs. Also, concentration of immunoglobulin (IgG) in serum samples of ewes and their lambs recorded the highest values with NP-Zn group. Serum total protein, albumin, globulin and glucose values in NP-Zn group recorded the highest values, followed by LP-Zn group, while control group had the lowest, either for ewes or suckling lambs. Serum AST, ALT and urea measurements were within the normal range for healthy sheep.It conclude that small amount of zinc in nano size, could replace zinc in normal size without any side effects on animal performance. In addition, zinc supplementation could improve nutrients digestibility, feed conversion, milk production and some related serum biochemical indicators.","PeriodicalId":129688,"journal":{"name":"Egyptian Journal of Sheep and Goat Sciences","volume":"25 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131894263","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}
This study was conducted in the livestock farm, College of Agriculture, University of Baghdad and the Genetic Resources Laboratories Unit, Animal Resources Department, Ministry of Agriculture and Biotechnology Research Center, AL-Nahrain University. The study was carried out during the period from Mid-July 2014 to 1 April 2015. The aim of the study was to determine the genotypic polymorphism of Calpastatin (CAST) gene and its association with a number of qualitative characteristics of sheep meat of local Awassi sheep carcasses, considering the effect of the animal sex. The study utilized 40 animals of local Awassi sheep; 20 males and 20 females, from which blood and tissue samples (Longissimus dorsi muscle, LD, and Biceps femoris muscle, BF) were collected. After DNA collection from blood samples, polymerase chain reaction (PCR) technique was followed using the primer of Intron I from L domain of the ovine calpastatin gene, which resulted in a full amplicon length of 565 bp fragment. The PCR products was digested using restriction endonucleases MspI to identify the genotypes of the CAST gene following the PCR-RFLP technique. Digested products were separated by electrophoresis on 1.5% agarose gel and visualized after staining with ethidium bromide on UV transilluminater. The MspI digestion of the PCR products produced digestion fragments of 306 bp (allele M) and 259 bp (allele N). Genotypic frequency was 75.00, 22.50 and 2.50% for the MM, MN and NN genotypes, respectively. The variation among these frequencies were highly significant. Allele frequency estimates were 0.86 and 0.14 for the M and N alleles, respectively. General qualities of tenderness and acceptability were not affected significantly with different genotypes of the gene. However, the difference in age was highly significantly (P≤0.01) affecting the sensory qualities (flavor, tenderness, juiciness and public acceptance), reaching the highest value for the recipe flavored at age 2-4 years (4.83). The highest value for the mellowness was at age 1-2 years. It amounted 3.18 and showed the highest value of prescription juiciness at age 1-2 years (2.95), while other ages (2-4 years and more than 4 years) were 2.27 and 2.74, respectively. Significant differences (P<0.05) were shown due to age effect for the same muscle; 5.53, 5.34 and 5.24 for the age classes 1-2 years, >4 years and 2-4 years, respectively. The muscle post-mortem pH was not affected by the genotype in either LD or BF muscles, in different age classes. Water—holding capacity was significantly affected by the CAST genotype and showed significant differences (P<0.05). It is therefore concluded that age of animals and CAST genotype can be relied on for selection porposes for meat quality in Awassi sheep. Effect of Polymorphism of Calpastatin gene, Age on meat Tenderness for Carcasses in Local
{"title":"تأثير التشكل الوراثي لجين الكالبستاتين والعمر على طراوة لحوم ذبائح الأغنام العواسي المحلي = Effect of Polymorphism of Calpastatin Gene, Age on Meat Tenderness for Carcasses in Local Awassi Sheep","authors":"W. Ibrahim, Ali kali","doi":"10.12816/0040200","DOIUrl":"https://doi.org/10.12816/0040200","url":null,"abstract":"This study was conducted in the livestock farm, College of Agriculture, University of Baghdad and the Genetic Resources Laboratories Unit, Animal Resources Department, Ministry of Agriculture and Biotechnology Research Center, AL-Nahrain University. The study was carried out during the period from Mid-July 2014 to 1 April 2015. The aim of the study was to determine the genotypic polymorphism of Calpastatin (CAST) gene and its association with a number of qualitative characteristics of sheep meat of local Awassi sheep carcasses, considering the effect of the animal sex. The study utilized 40 animals of local Awassi sheep; 20 males and 20 females, from which blood and tissue samples (Longissimus dorsi muscle, LD, and Biceps femoris muscle, BF) were collected. After DNA collection from blood samples, polymerase chain reaction (PCR) technique was followed using the primer of Intron I from L domain of the ovine calpastatin gene, which resulted in a full amplicon length of 565 bp fragment. The PCR products was digested using restriction endonucleases MspI to identify the genotypes of the CAST gene following the PCR-RFLP technique. Digested products were separated by electrophoresis on 1.5% agarose gel and visualized after staining with ethidium bromide on UV transilluminater. The MspI digestion of the PCR products produced digestion fragments of 306 bp (allele M) and 259 bp (allele N). Genotypic frequency was 75.00, 22.50 and 2.50% for the MM, MN and NN genotypes, respectively. The variation among these frequencies were highly significant. Allele frequency estimates were 0.86 and 0.14 for the M and N alleles, respectively. General qualities of tenderness and acceptability were not affected significantly with different genotypes of the gene. However, the difference in age was highly significantly (P≤0.01) affecting the sensory qualities (flavor, tenderness, juiciness and public acceptance), reaching the highest value for the recipe flavored at age 2-4 years (4.83). The highest value for the mellowness was at age 1-2 years. It amounted 3.18 and showed the highest value of prescription juiciness at age 1-2 years (2.95), while other ages (2-4 years and more than 4 years) were 2.27 and 2.74, respectively. Significant differences (P<0.05) were shown due to age effect for the same muscle; 5.53, 5.34 and 5.24 for the age classes 1-2 years, >4 years and 2-4 years, respectively. The muscle post-mortem pH was not affected by the genotype in either LD or BF muscles, in different age classes. Water—holding capacity was significantly affected by the CAST genotype and showed significant differences (P<0.05). It is therefore concluded that age of animals and CAST genotype can be relied on for selection porposes for meat quality in Awassi sheep. Effect of Polymorphism of Calpastatin gene, Age on meat Tenderness for Carcasses in Local","PeriodicalId":129688,"journal":{"name":"Egyptian Journal of Sheep and Goat Sciences","volume":"337 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116486899","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":"Immune and Hemato-Biochemical Indices of Barki Ewes and Their Offspring as Affected by Feeding Some Forage Shrubs in Egyptian Northern Coast","authors":"M. Eissa, M. M. Anwer, E. EL-Gohary","doi":"10.12816/0040198","DOIUrl":"https://doi.org/10.12816/0040198","url":null,"abstract":"","PeriodicalId":129688,"journal":{"name":"Egyptian Journal of Sheep and Goat Sciences","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129268255","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 Sunflower Oil Supplementation with or without Thyme Leaves (Thymus Vulgaris) on Digestibility, Milk Production and Milk Fatty Acid Profile of Dairy Goats","authors":"H. Sayed, M. Yacout","doi":"10.12816/0040201","DOIUrl":"https://doi.org/10.12816/0040201","url":null,"abstract":"","PeriodicalId":129688,"journal":{"name":"Egyptian Journal of Sheep and Goat Sciences","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128894133","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":"Potential of Tannin Ferrous Plants to Improve Efficiency of Sheep Production in Dry Areas","authors":"H. Metawi, M. Anwar, H. Ghobashy","doi":"10.12816/0040202","DOIUrl":"https://doi.org/10.12816/0040202","url":null,"abstract":"","PeriodicalId":129688,"journal":{"name":"Egyptian Journal of Sheep and Goat Sciences","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123278381","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":"Nutrient Digestibility, Productive Performance and Some Serum Bio-Indices as Affected by Vitamin A and E Supplement to Growing Lambs = معاملات الهضم الغذائية، الأداء الإنتاجي وبعض مؤشرات السيرم الحيوية نتيجة للإمداد بفيتامين أ وفيتامين ھ على الحملان النامية","authors":"E. M. Ibrahim","doi":"10.12816/0037585","DOIUrl":"https://doi.org/10.12816/0037585","url":null,"abstract":"","PeriodicalId":129688,"journal":{"name":"Egyptian Journal of Sheep and Goat Sciences","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128840399","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":"Relationship of Sperm Characteristics in Reference with DNA Fragmentation with Fertility of Some Sheep Breeds in Egypt = علاقة خصائص الحيوانات المنوية وخصوصا تشوه الحامض النووي للحيوانات المنوية بخصوبة بعض سلالات الأغنام في مصر","authors":"Sh. M. Shamiah, M. M. Al-Maghraby, A. M. Deghedy","doi":"10.12816/0037584","DOIUrl":"https://doi.org/10.12816/0037584","url":null,"abstract":"","PeriodicalId":129688,"journal":{"name":"Egyptian Journal of Sheep and Goat Sciences","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121331552","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":"Reproductive Performance of Ossimi Sheep as Affected by Oxytocin Injection during Mating Season = الأداء التناسلي للأغنام الأوسيمي تحت تأثير الحقن بهرمون الأوكسيتوسين أثناء موسم التلقيح","authors":"M. Mohamed, A. A. A. El-Hakeam","doi":"10.12816/0037581","DOIUrl":"https://doi.org/10.12816/0037581","url":null,"abstract":"","PeriodicalId":129688,"journal":{"name":"Egyptian Journal of Sheep and Goat Sciences","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127463525","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}
Thirty Egyptian Farafra ewes were used to study the effect of seasonal variations on reproductive cycle and ovarian activity. Estrus was detected twice daily throughout the year. Percentages of ewes showing estrus monthly, number of estrous cycle/ewe/season, estrous cycle length and heat duration were measured throughout different seasons of the year. Changes in ovarian activity were examined using Laparoscopy technique. Percentage of ovulated ewes, ovulation rate and number of large and small follicles were recorded over different seasons. The obtained results revealed that the highest active cycles were observed in autumn and summer (87.1 and 84%), while the lowest was observed in spring (64.3%). Percentages of ewes that exhibited normal estrous cycle length during winter, spring; summer and autumn were 73.3, 47.0, 64.0, and 44.5%, respectively. While, the percentage of the short estrous cycle length was high in autumn (37.0%). During spring, summer and winter, the percentages of the long cycle length were 25.0, 20.0 and 20.0 %, respectively. The percentages of ewes showed normal heat duration during autumn was 63.0%, summer (56.0%) and spring (46.4%), while the percentage of ewes exhibited short heat duration were in spring (53.6%) and winter (50%). During autumn, ewes recorded the longest (p<0.01) heat duration (64.7 hrs). Ovulation rate was the highest (P< 0.01) in autumn (1.75) and the lowest in winter (0.82). Incidence of large follicles (2.76 > 3 mm 3 ) in diameter were significantly higher (P<0.05) in winter. Plasma progesterone concentration was always the lowest at the onset of estrous, increased gradually to a maximum level in day 8 and remained until day 14 (luteal phase), then declined in day 16 in winter, spring and summer and at day 18 in autumn. In conclusion, subtropical Farafra ewes were almost cyclic throughout the year. Reproductive performance of Farafra ewes still need more studies to reveal the strength and potential of this breed.
以30只埃及法拉法拉母羊为研究对象，研究季节变化对其生殖周期和卵巢活动的影响。全年每天检测两次发情。在一年中不同季节测量母羊每月发情的百分比、发情周期数/母羊/季节、发情周期长度和发情持续时间。使用腹腔镜检查卵巢活动的变化。记录不同季节母羊的排卵率、排卵率和大、小卵泡数。结果表明，活度周期以秋季和夏季最高(87.1和84%)，春季最低(64.3%);在冬季和春季，母羊的发情周期长度正常的百分比;夏季和秋季分别为73.3%、47.0%、64.0和44.5%。而发情周期短的比例在秋季最高(37.0%)。春、夏、冬三季长周期长度所占比例分别为25.0%、20.0%和20.0%。发热期正常的母羊比例分别为秋季(63.0%)、夏季(56.0%)和春季(46.4%)，发热期短的母羊比例分别为春季(53.6%)和冬季(50%)。秋季母羊直径最长(p 3 mm 3)显著高于冬季(p <0.05);血浆孕酮浓度在发情时最低，在第8天逐渐升高至最高，并一直保持到第14天(黄体期)，然后在冬春夏第16天和秋季第18天下降。总之，亚热带法拉法拉母羊全年几乎是周期性的。法拉法拉母羊的繁殖性能还需要更多的研究来揭示这个品种的实力和潜力。
{"title":"Seasonal Changes of Some Reproductive Traits in Farafra Ewes under Egyptian Environmental Condition","authors":"Eitedal H. El-Saye","doi":"10.12816/0037582","DOIUrl":"https://doi.org/10.12816/0037582","url":null,"abstract":"Thirty Egyptian Farafra ewes were used to study the effect of seasonal variations on reproductive cycle and ovarian activity. Estrus was detected twice daily throughout the year. Percentages of ewes showing estrus monthly, number of estrous cycle/ewe/season, estrous cycle length and heat duration were measured throughout different seasons of the year. Changes in ovarian activity were examined using Laparoscopy technique. Percentage of ovulated ewes, ovulation rate and number of large and small follicles were recorded over different seasons. The obtained results revealed that the highest active cycles were observed in autumn and summer (87.1 and 84%), while the lowest was observed in spring (64.3%). Percentages of ewes that exhibited normal estrous cycle length during winter, spring; summer and autumn were 73.3, 47.0, 64.0, and 44.5%, respectively. While, the percentage of the short estrous cycle length was high in autumn (37.0%). During spring, summer and winter, the percentages of the long cycle length were 25.0, 20.0 and 20.0 %, respectively. The percentages of ewes showed normal heat duration during autumn was 63.0%, summer (56.0%) and spring (46.4%), while the percentage of ewes exhibited short heat duration were in spring (53.6%) and winter (50%). During autumn, ewes recorded the longest (p<0.01) heat duration (64.7 hrs). Ovulation rate was the highest (P< 0.01) in autumn (1.75) and the lowest in winter (0.82). Incidence of large follicles (2.76 > 3 mm 3 ) in diameter were significantly higher (P<0.05) in winter. Plasma progesterone concentration was always the lowest at the onset of estrous, increased gradually to a maximum level in day 8 and remained until day 14 (luteal phase), then declined in day 16 in winter, spring and summer and at day 18 in autumn. In conclusion, subtropical Farafra ewes were almost cyclic throughout the year. Reproductive performance of Farafra ewes still need more studies to reveal the strength and potential of this breed.","PeriodicalId":129688,"journal":{"name":"Egyptian Journal of Sheep and Goat Sciences","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123549774","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}
This study was conducted to evaluate the effects of weaning age (early, traditional and late weaning), parity number (first, second and third or more), birth type (single and twins) and sex of lamb (male and female) on growth performance of Ossimi lambs during post-weaning period. One hundred and five Ossimi lambs distributed into 3 groups based on their weaning age. Lambs of early weaning group weaned at 56 days age, while, the second and third groups of lambs were remained with their mothers until 84 days (for traditional) and 112 days (for late weaning). The study performed at the experimental farm belongs to Faculty of Agriculture at Moshtohor, Benha University, Egypt, and lasted 240 days. Monthly live body weight (LBW) was recorded individually, while average daily gain (ADG) and total weight gain (TWG) were calculated as growth indices. Both total and daily feed intake (TFI and DFI) of dry matter were determined, then feed conversion ratio (FCR) and economical feed efficiency (EFE) were calculated. Regarding the effect of weaning age, results indicated that early weaned lambs showed a significant (P<0.05) heavier LBW, while traditional and late weaned lambs had the lowest LBW from post-weaning until yearling weight. TWG and ADG of the early weaned lambs were greater than those weaned at the traditional and late ages (P<0.001). Obtained results indicated that parity number had a significant (P<0.05) effect on LBW, while it did not affected TWG and ADG of lambs. Concerning the effects of birth type and sex of lamb, results indicated that single born ram-lambs had heavier LBW and higher ADG than twin born ewe-lambs. TFI, DFI, FCR and EFE in early weaned lambs were greater (P˂0.001) than those weaned at the other ages. In conclusion, early weaning at 56 days of age, compared with weaning at 84 and 112 days, had positive effects on LBW, TWG and ADG of lambs. Thus, Ossimi sheep producers should wean their lambs at 56 days of age to earn heavier LBW and higher TWG and ADG.
{"title":"Effects of Weaning Age and Some Other Factors on Growth Performance of Ossimi Lambs = تأثير عمر الفطام وبعض العوامل الأخرى على أداء النمو في الحملان الأوسيمي","authors":"T. M. Hassan","doi":"10.12816/0037583","DOIUrl":"https://doi.org/10.12816/0037583","url":null,"abstract":"This study was conducted to evaluate the effects of weaning age (early, traditional and late weaning), parity number (first, second and third or more), birth type (single and twins) and sex of lamb (male and female) on growth performance of Ossimi lambs during post-weaning period. One hundred and five Ossimi lambs distributed into 3 groups based on their weaning age. Lambs of early weaning group weaned at 56 days age, while, the second and third groups of lambs were remained with their mothers until 84 days (for traditional) and 112 days (for late weaning). The study performed at the experimental farm belongs to Faculty of Agriculture at Moshtohor, Benha University, Egypt, and lasted 240 days. Monthly live body weight (LBW) was recorded individually, while average daily gain (ADG) and total weight gain (TWG) were calculated as growth indices. Both total and daily feed intake (TFI and DFI) of dry matter were determined, then feed conversion ratio (FCR) and economical feed efficiency (EFE) were calculated. Regarding the effect of weaning age, results indicated that early weaned lambs showed a significant (P<0.05) heavier LBW, while traditional and late weaned lambs had the lowest LBW from post-weaning until yearling weight. TWG and ADG of the early weaned lambs were greater than those weaned at the traditional and late ages (P<0.001). Obtained results indicated that parity number had a significant (P<0.05) effect on LBW, while it did not affected TWG and ADG of lambs. Concerning the effects of birth type and sex of lamb, results indicated that single born ram-lambs had heavier LBW and higher ADG than twin born ewe-lambs. TFI, DFI, FCR and EFE in early weaned lambs were greater (P˂0.001) than those weaned at the other ages. In conclusion, early weaning at 56 days of age, compared with weaning at 84 and 112 days, had positive effects on LBW, TWG and ADG of lambs. Thus, Ossimi sheep producers should wean their lambs at 56 days of age to earn heavier LBW and higher TWG and ADG.","PeriodicalId":129688,"journal":{"name":"Egyptian Journal of Sheep and Goat Sciences","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114182808","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：