Change in serum blood components as affected by breeding period and protected protein

* Solouma G. M. A.;**A. K. I Abd El moty;*A. Y. Kassab; **A. A. Abdel-Ghani;

and**E. B. Soliman.

*Department of Animal Production, Faculty of Agriculture, Sohag University.

** Department of Animal Production, Faculty of Agriculture, Minia University.

ABSTRACT

Protein of canola meal was protected by  heat ( T1 ) or sodium hydroxide      (T2) treatments. Two experiments were  carried out in this investigation. A total number of 12 healthy male Sohagi lambs averaged 35.8±1.29 kg body weight were used in the first  experiment. Animals were divided randomly into three equal (n=4) groups  (control, T1 and   T 2) to  evaluate  the effect of  protected protein  on  nutritive value  of experimental concentrate rations such as  total digestible nutrients  ( TDN ) and digestible crude protein ( DCP ).  Results indicated that protected protein in T 1 and T2 resulted  significant (P<0.05) increasing TDN and DCP values.  A total of 36 healthy Sohagi ewes at 3-4 years of age and 40.60± 1.60 kg body weight  were used in the second  experiment during breeding period (42 days). Animals were randomly divided into three equal groups  as in same as experiment one. Blood samples were collected from all ewes 8 days before mating, estrus (mating day), 8 days and 34 days after mating. Results reveled that serum  triiodothyronine  recorded significant (P<0.01)  differences due to   treatment, while  thyroxin concentrations were  increased insignificantly in T1 and T2. Highest values of triiodothyronine and thyroxin  recorded at estrus , were 152.72 ng/dl and 7.13 µg/dl, respectively. At the same time, serum progesterone concentrations in different treatments were  significant (P<0.01) different and  the highest values were observed in T1. Values of progesterone at 8 days before mating, 8 and  34 days after mating resulted  significant (P<0.01) increasing  ,while at estrus there were no significant differences. The effect of treatments or breeding  period on total protein, albumen and globulin concentrations were  not significant. Blood serum glucose concentrations in different treatments  indicated higher values in T1 compared with the other both treatments. Levels of glucose concentrations at 8 days before mating, estrus, at 8 and 34 days after mating showed significant (P<0.01) differences. The results indicated that a highest level of serum glucose (71.69 mg/dl) concentration was coincided with the day of estrus. The present results indicated that urea-N and creatinine concentrations were decreased (P<0.01) as a result of protected protein supplementation in the ration.

Throughout the breeding period differences in urea-N and creatinine concentrations were not significant. The present results indicated that feeding  protected protein   during breeding period  change  most studied  serum blood components.

Key wards: Protected protein , blood components , breeding period, sheep.

.   Egyptian J. Nutrition and Feeds ( 2011) 14 (1) : 11-18