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English :
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Physiological studies on reproduction
of farm animals.(Effect of feeding protected protein diets on reproductive performance of Freisian Bulls
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Arabic :
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دراسات فسيولوجية على التناسل في حيوانات المزرعة (تأثير العلائق المحتوية على بروتينات محمية على الكفاءة التناسلية لطلائق الفريزيان
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| Abstract |
The present study was conducted at Sakha Experimental Station, Animal Production Research Institute, Ministry of Agriculture during the period from December, 1998 to April, 1999.
Twelve Friesian bulls were used to evaluate the effect of protected protein on growth and reproductive performance pf Friesian bulls.
Formaldehyde-treated CFM (1 % on the basis of CP) was used in two levels (50 and 100%) in rations of Friesian bulls as the following.
Treatment 1 (control): 100% untreated CFM + fresh berseem + rice straw (0% TCFM).
Treatment 2: 50% UCFM + 50% TCFM + fresh berseem + rice straw (50% TCFM)
Treatment 3: 100% TCFM + fresh berseem + rice straw (100% TCFM).
The obtained results concerning the growth performance could be summarized as the following:
(l)Live body weight and feed efficiency were not affected significantly by feeding bulls on TCFM as compared to the control, however average daily gain was significantly (P<0.05) higher only for bulls fed 100% TCFM.
(2)Feeding bulls on 100% TCFM resulted in significantly (P<0.05) lower concentration of VFA in rumen liquor, being 14.5 meq/l00 ml as compared to the control (18.2 meq/l00 ml). However, bulls fed on 50%
TCFM did not differ significantly than the control. Ruminal pH values were associated with level of VFA, being significantly (P<0.05) higher in bulls fed 100% (6.83) than 50% (6.30) and the control bulls (6.28). Also,
significant (P<0.05) reduction was observed in NH3 level in rumen liquor as a result of protected protein or its level, being 13.9 and 10.7 mg/100 ml in bulls fed 50 and 100% TCFM, respectively as compared to 16.1 mg/100 ml in the control bulls.
(3)Blood parameters including WBC count in blood and total protein and their fraction as well as albumin/globulin ratio and GOT and GPT ratio in blood plasma did not differ significantly (P>0.05) among dietary treatments. However, RBC count and Hb concentration and PCV% in blood were significantly (P<0.05) higher in bulls fed TCFM than the control. Yet, activities of GOT and GPT as well as concentration of urea N and creatinine increased in blood plasma of the control bulls than those
fed TCFM.
Feeding bulls protected protein diets resulted in pronounced improvement in sexual desire and all physical characteristics of semen.
The obtained results revealed that:
(1)The sexual desire for Friesian bulls expressed as reaction time ranged between 42.33 and 50.5 s and was significantly (P<0.05) shorter in bulls fed 100 and 50% by about 12.8 and 16.2% than the control bulls.
However, bull fed both level of protected protein did not differ significantly.
(2)The overall mean values of ejaculate volume ranged between 3.23 and 4.19 ml and were significantly (P<0.05) higher in bulls fed 50 and 100% TCFM by about 15.8 and 29.7% than the control, respectively.
(3)The overall mean values of sperm cell concentration ranged between 1.005 and 1.077 (x 109/ml), being significantly (P<0.05) higher in semen of the control bulls by about 4.7 and 7.2% than in those of bulls fed 50 and 100% TCFM, respectively.
(4)The percentage of sperm motility was improved significantly (P<0.05) from 56.46% in the control semen to be 62.5 and 66.88% in semen of bulls fed 50 and 100% TCFM, respectively.
(5)The percentage of live spermatozoa increased significantly (P<0.05) to be 63.9 and 69.2% in semen of bulls fed 50 and 100% TCFM, respectively as compared to 56.7% in semen of the control bulls.
(6)There was marked reduction in sperm abnormality percentage in semen of bulls fed TCFM than the control. Sperm abnormality percentage was significantly (P<0.05) higher in the control semen (8.47%) as compared to 5.7 and 4.7% in bulls fed on 50 and 100% TCFM, respectively.
Inspit of the reduction in sperm cell concentration in semen of bulls fed on TCFM, mean value of sperm output per ejaculate in terms of total, live and normal sperm were almost higher in semen of bulls fed protected
protein diet than the control as following:
(1) The overall mean values of total, and live sperm output were significantly (P<0.05) higher in semen of bulls fed on 50 and 100% TCFM by about 10.6 and 20.9%, and 24.8 and 47.7% than the control,
respectively. However, normal sperm output was significantly higher by about 14.2 and 26.1% in semen of bulls fed 50 and 100% TCFM than the
control, respectively.
Concerning the change in enzymatic activity in seminal plasma of bulls, the results indicated the tendency of lower activities of GOT, GPT and LDH in seminal plasma of bulls fed TCFM than the control as the following:
(1) Activity of GOT had significantly (P<0.05) the lowest values in seminal plasma of bulls fed n 100% TCFM (30.8 U/L), followed by those fed 50% TCFM (32.2 U/L), while the control showed the highest GOT activity (35.5 U/L). However, the differences were only significant (P<0.05) between bulls fed 100% TCFM and the control bulls.
(2)Activities of GPT, LDH and GOT/GPT ratio in seminal plasma of bulls did not differ significantly, although they tended to be higher in the control seminal plasma than those in bulls fed TCFM.
(3)Testosterone concentration in blood plasma was affected significantly (P<0.05) by feeding bulls on protected protein diets, being the highest in blood plasma of bulls fed 100% FTCM, followed by those fed 50%, while the control had the lowest values.
On the light of the obtained results, it could be concluded that feeding Friesian bulls on protected protein diets in form of formaldehy-detreated concentrate feed mixture had beneficial effect on growth performance of bulls and their reproductive performance in terms of good sexual desire and production of semen with high quantity (ejaculate volume) and quality (sperm output).
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| Publication year |
2000
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| Pages |
123p.
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| Availability location |
مكتبة معهد بحوث الانتا ج الحيوانى - شارع نادى الصيد - الدقى - الجيزة
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| Availability number |
705
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| Organization Name |
Animal Production Research Institute (APRI)
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| Country |
Egypt
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| Department |
Biotechnolog Research Department
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - Reproduction
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AGROVOC
TERMS |
Bulls.
Cows.
Formaldehyde.
Growth.
Livestock.
Proteins.
Reproduction.
Reproductive performance.
Rice straw.
Trifolium alexandrinum.
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| Publication Type |
Master Thesis
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