@article { author = {Damarany, Damarany}, title = {Influence of Season of Calving, Parity and Flunixin Meglumine Administration on Conception Rate in Repeat Breeder Egyptian Baladi Cows and their Crosses}, journal = {Journal of Animal and Poultry Production}, volume = {8}, number = {10}, pages = {409-414}, year = {2017}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3642}, eissn = {2090-3723}, doi = {10.21608/jappmu.2017.46034}, abstract = {This work was conducted to evaluate the effect of season of calving, parity and treatment with Flunixin Meglumine (NSAID) on conception rate in repeat breeder Egyptian Baladi cows and their crosses (Baladi x Friesian). Season of calving was divided into two season cold season (from November to April) and hot season (May to October). A total of 120 cows (n= 60 Baladi cows, n= 60 crossbred cows) were used in the study. 30 Baladi cows were taken and another crossbred was calved during the cold season and was divided into four groups of each group consisting of 15 cows. A total of 30 Baladi cows were also taken and another crossbred was calved during the hot season. It was divided into four groups, each consisting of 15 cows. Fifteen Baladi cows and another crossbred Flunixin Meglumine were treated (1.1 mg / kg BW intramuscular) at fourteenth day from mating in both cold and hot seasons and the other group was as control. The main results showed that the overall average conception rate in Baladi cows was 43.3% higher than that of crossbred cows (30%). Conception rate was higher in Baladi cows calved during the cold season (46.7%) than in cows calved during the hot season (40%). Conception rate of crossbred cows calved during the season was 33.3% higher than those born during the hot season (26.7%). Conception rate in cows in the fourth parity was higher in both Baladi and crossbred cows (83.3 and 50%) respectively compared to the second and third parity. Administration with Flunixin Meglumine resulted in an increase in conception rate of 13.3% in both Baladi and crossbred cows. Concentration of P4 was higher during the first three weeks of conception in the treated Flunixin Meglumine cows than in non-treated cows in both Baladi and crossbred cows. The current study showed the negative effect of the hot season on the rate of conception in cows raised under the conditions of the hot zones, as well as the positive effect of treatment with Flunixin Meglumine on the conception rate in cows. Conception rate was higher during the 4th parity in Baladi and their crosses. The current study recommends the synchronization of estrous in cows to arrange the births to be during the cold season to avoid the problems of the hot season, especially in southern Egypt, as well as treated with Flunixin Meglumine on the fourteenth day of mating in cows. Future studies on the treatment of Flunixin Meglumine in cows.}, keywords = {Baladi and crossbred cows,season,parity,Flunixin Megluminen,conception rate}, url = {https://jappmu.journals.ekb.eg/article_46034.html}, eprint = {https://jappmu.journals.ekb.eg/article_46034_b601cc878e0490ef39a7a78040418bf4.pdf} } @article { author = {Elnahas, A. and ElSayed, Manal and Elshennawy, M.}, title = {Prediction of Live Body Weight from Body Measurements Using Stepwise Regression Analysis in Sohagi Sheep}, journal = {Journal of Animal and Poultry Production}, volume = {8}, number = {10}, pages = {415-418}, year = {2017}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3642}, eissn = {2090-3723}, doi = {10.21608/jappmu.2017.46040}, abstract = {This study aimed at predicting of live body weight from body measurements using stepwise regression analysis. Body measurements data of 212 animals, Sohagi sheep flock (64 male and 148 female) were used. Body weight (BW) and four body measurements were measured: heart girth (HG), height at withers (HW), height at rump (HR) and body length (BL). The stepwise regression analysis was performed in order to retain the X variable(s) (the body measurements) that contribute significantly (P < 0.05) to the variability in the dependent variable (BW).  Results indicated that, there were high and positive correlation coefficients between the body weight and all body measurements. The highest correlation coefficient (r=0.93) was obtained between BW and HG and the lowest correlation coefficient (r= 0.88) was between BW and BL. All the studied body measurements were entered into the model and through stepwise elimination procedure two of them were considered unfit in the model (HR) and (BL). The two body measurements that best fit the model are heart girth (HG) and height at withers (HW), accounting for 92% of the live weight in Sohagi sheep.  Changes of  R2 from the first model (R2=0.86, this model included HG only) to the third model (R2=0.92), explained that, the most important variable in predicting BW is HG. The standardized coefficient (Beta) is used to explain the contribution of each independent variable in the model.  So, the most important variable is HG (Beta = 0.92), this variable is the most important variable to explain the variability in BW. The prediction equation explained that regression coefficient of BW/HG = 0.35, this means that when the heart girth increases by one unit (1cm), the live body weight increases by 0.35 kg in sohagi sheep.}, keywords = {live body weight,body measurements,stepwise regression and sohagi sheep}, url = {https://jappmu.journals.ekb.eg/article_46040.html}, eprint = {https://jappmu.journals.ekb.eg/article_46040_d0643af7610e127e853a8279566c3e52.pdf} } @article { author = {Maklad Eman, H. and El-Ayek, M. and Abd El-Khabir, A. and Sharaf, K.}, title = {Effect of Feeding Different Levels of Corn Gluten Feed on Milk Production and Economic Efficiency in Friesian Dairy Cows Rations.}, journal = {Journal of Animal and Poultry Production}, volume = {8}, number = {10}, pages = {419-424}, year = {2017}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3642}, eissn = {2090-3723}, doi = {10.21608/jappmu.2017.46043}, abstract = {In this study, the weight of the twelve cows was ranging from 435-570kg. The animals in this study were in the 2nd to 4th lactation season. In order to study the production of milk and its composition by the effect of the tested rations, cows were subdivided into four groups (three cows in each group). According to NRC (2001) recommendations all groups were fed individually. The period of the experiment was 140 days (20 weeks) after 6 weeks from calving. The four experimental rations as DM were formulated nearly as follows : control: 52% concentrate feed mixture (CFM) (40% corn grain, 30% wheat bran, 23% undecorticated cottonseed meal, 5% molasses, 0.5% salt and 1.5% limestone) + 20% corn silage (CS) + 28% rice straw (RS), experimental ration 1 (Exp.1): 52% CFM (35% corn grain, 30% wheat bran, 10% corn gluten feed (CG), 18% undecorticated cottonseed meal, 5% molasses, 0.5% salt and 1.5% limestone) + 20% CS + 28% RS, (Exp.2): 52% CFM ( 32.5% corn grain, 30% wheat bran, 15% CG, 15.5% undecorticated cottonseed meal, 5% molass, 0.5% salt and 1.5% limestone) + 20% CS + 28% RS and (Exp.3): 52% CFM (30% corn grain, 30% wheat bran, 20% CG, 13% undecorticated cottonseed meal, 5% molasses, 0.5% salt and 1.5% limestone) + 20% CS + 28% RS. The dry matter intakes (% body weight) were higher with feeding on Exp.1 or Exp.2 (3.38 and 3.51) respectively, than feeding on control or Exp.3 (3.25 and 3.26, respectively). There was no significant effect on the average daily milk yield with feeding the experimental rations from Week 1 to Week 20. The average daily milk yield results were 13.68, 14.71, 15.73 and 14.79 Kg /day with feeding on the control, Exp.1, Exp.2 and Exp.3, respectively. The highest value was with feeding on Exp.2 than the other rations. Regarding the milk composition, protein (%( was higher (p <0.05) with feeding on Exp.1 than feeding on Exp.2 or Exp.3 (2.42, 2.26 and 2.28) respectively, but there was no significant effect with the control ration (2.37) and there was no significant effect between the control and Exp.3. Milk total solids (%), fat (%), lactose (%), solids non-fat (%), net energy of lactation (Mcal /Kg), fat corrected milk (Kg / day), fat yield (Kg / day), protein yield (Kg / day) and lactose yield (Kg / day) did not significantly affect by dietary treatments. The best values of feed conversion (dry matter intake Kg/Kg fat corrected milk) were with feeding on rations containing corn gluten feed: Exp.1, Exp.2 and Exp.3 (1.15, 1.14 and 1.16) respectively, than the control (1.27) which was without corn gluten feed. The highest values of the profit (LE) were with feeding on Exp.1, Exp.2 and Exp.3 (29.08, 30.64 and 30.32) than feeding on the control one (23.72), respectively. The replacement of amounts of corn grain and cottonseed meal in the concentrate feed mixture in lactating cows rations by 15% corn gluten feed are often considered for enhancing production of milk, persistency and economic efficiency.}, keywords = {lactating Friesian cows,corn silage,corn gluten feed,Milk production and Milk composition}, url = {https://jappmu.journals.ekb.eg/article_46043.html}, eprint = {https://jappmu.journals.ekb.eg/article_46043_c43086a44ea90af4c8f2f1b698637694.pdf} }