CHANGES IN BLOOD CONSTITUENTS, COLOSTRUM AND TRANSITIONAL MILK OF RAHMANI EWES IN RELATION TO BARLEY RADICLE FEEDING AND DAYS RELATIVE TO PARTURITION. | ||||
| Journal of Animal and Poultry Production | ||||
| Article 5, Volume 27, Issue 10, October 2002, Page 6665-6676 PDF (3.79 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2002.256763 | ||||
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| Authors | ||||
| Y. A. Maareck,1; Y. M. Hafez2 | ||||
| 1Animal Production Department, National Research Center, Dokki, Giza, Egypt. | ||||
| 2Animal Production Department, Faculty of Agriculture, Cairo University, Giza, Egypt. | ||||
| Abstract | ||||
| A total of 15 multiparous pregnant Rahmani ewes (38.9 ± 1.21 kg) belonging to the Agriculture Experimental and Research Station. Faculty of Agriculture, Cairo University were used in this research. The objectives were two folds: 1-Studying the effect due to substitution of the concentrate feed mixture crude prctein of a control ration (no barley radicle, T1) by barley radicle crude protein (BRP) at 20 % (T2) or 40 % (T3) levels on some blood characteristics and composition of colostrum and transitional milk. 2-lnvestigating the changes in blood characteristics and composition of colostrum and transitional milk over different days relative to parturition. The experiment started 4 weeks before expected lambing date and continued till the io" day post-lambing. Results indicated that 40% BRP feeding did not significantly affect any of blood PCV% and Hb or plasma albumin or urea. Meanwhile, plasma total protein (TP) and globulin values decreased by 20% BRP inclusion while increased by the 40% BRP. Plasma creatinine and AL T activity tended to increase with BRP inclusion while plasma AST activity increased with the 20% BRP level and decreased with the 40% BRP. Values of PCV%, Hb, TP, globulin and AL T were the highest at the za" day prepartum and greatly declined just after parturition and stabilized thereafter. In contrast plasma albumin, albumin: globulin ratio (A/G) , urea, creatinine and AST values were the minimum at the za" day prepartum and elevated to their maximum levels just after parturition and decreased again thereafter at the io" day post- lambing. Results also indicated that 40% BRP feeding improved colostrum and transitional milk composition and their calorific values than the control or those fed 20% BRP. The 1st colostrum, just after parturition and before suckling, was the richest in all studied nutritive constituents and calorific value, except lactose. All the studied colostral constituents and gross energy significantly decreased with days post- lambing till the io" day, except lactose which showed a reversed trend. It is concluded that inclusion of barley radicle in the rations of Rahmani ewes as a source of protein up to 40% of the concentrate feed mixture (24.64% of the total dietary CP), starting 4 weeks pre-lambing, improved colostrum and transitional milk composition. Also, days after parturition significantly affected the constituents of mammary gland secretions. The first colostrum (before suckling) was the richest in all studied constituents and calorific value, except lactose. | ||||
| Keywords | ||||
| barley radicle; Rahmani ewes; colostrum; transitional milk; blood constituents | ||||
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