EFFECT OF THREE METHODS OF ESTRUS SYNCHRONIZATION: OVSYNCH, CIDR+OVSYNCH AND PRESYNCH+OVSYNCH ON THE FERTILITY OF DAIRY COWS

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GHASHAMI M.; MOGHADAM GH.A.; DAGHIGH KIA H.; RAAFAT S.A.; TAGHIZADEH A.

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Journal: ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ) Year:2012 | Volume:22 | Issue:2 Page(s): 69-79

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Title

EFFECT OF THREE METHODS OF ESTRUS SYNCHRONIZATION: OVSYNCH, CIDR+OVSYNCH AND PRESYNCH+OVSYNCH ON THE FERTILITY OF DAIRY COWS

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Keywords

CIDRQ3

OVSYNCHQ2

PREGNANCY RATEQ3

PRESYNCHQ2

Abstract

This study was performed to study the effect of using CIDR and PRESYNCH method with OVSYNCH program on the pregnancy level of dairy cows. Cows were allocated to three groups OVSYNCH (control, n=40), PRESYNCH+ovsynch (n=40) and CIDR+ovsynch (n=33). They were compared to the rate of blood metabolite concentrations and their effects on PREGNANCY RATE. At the time of insemination 5 ml blood was taken with venoject tubes without anticoagulant, and achieved blood sera were frozen at -20co to test. Achieved Data were analyzed following two models: In the first model using software GLM procedure SAS 9.1, were analyzed the effects of treatment, stage of lactation, milk record monthly and ambient temperature effect on measured blood metabolites. Effect of milk record monthly with probability level (P<0.05) on blood serum glucose was significant and effects of environmental temperature and stage of lactation on blood serum BHBA were quite significant (P<0.01). Effects of treatment and ambient temperature on blood serum estrogen were quite significant (P<0.01) and monthly records of milk had a significant effect (P<0.05). Parity and annual milk production had no significant effects on any of the blood metabolites. In the second model using logistic regression, effects of variables related to animal and measured metabolites on pregnancy were analyzed. Blood serum glucose concentration (P<0.01) and blood serum BHBA concentration (P<0.05) were significant. This means that condition of constant other factors, one unit increasing in serum glucose concentration increase 0.03 units possibility of conversion non-pregnancy to pregnancy and one unit decreasing in serum concentration of BHBA increases 0.22 units possibility of conversion non-pregnancy to pregnancy. PREGNANCY RATE in PRESYNCH+ovsynch program was higher than OVSYNCH program and CIDR+ovsynch program (4.22%, 12.85%) respectively, which increased the number of pregnant animal in one year. According to the results of this study could be suggested that the PRESYNCH+ovsynch program is appropriate method for managing cattle reproduction and increasing production.

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APA: Copy

GHASHAMI, M., MOGHADAM, GH.A., DAGHIGH KIA, H., RAAFAT, S.A., & TAGHIZADEH, A.. (2012). EFFECT OF THREE METHODS OF ESTRUS SYNCHRONIZATION: OVSYNCH, CIDR+OVSYNCH AND PRESYNCH+OVSYNCH ON THE FERTILITY OF DAIRY COWS. ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ), 22(2), 69-79. SID. https://sid.ir/paper/147573/en

Vancouver: Copy

GHASHAMI M., MOGHADAM GH.A., DAGHIGH KIA H., RAAFAT S.A., TAGHIZADEH A.. EFFECT OF THREE METHODS OF ESTRUS SYNCHRONIZATION: OVSYNCH, CIDR+OVSYNCH AND PRESYNCH+OVSYNCH ON THE FERTILITY OF DAIRY COWS. ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ)[Internet]. 2012;22(2):69-79. Available from: https://sid.ir/paper/147573/en

IEEE: Copy

M. GHASHAMI, GH.A. MOGHADAM, H. DAGHIGH KIA, S.A. RAAFAT, and A. TAGHIZADEH, “EFFECT OF THREE METHODS OF ESTRUS SYNCHRONIZATION: OVSYNCH, CIDR+OVSYNCH AND PRESYNCH+OVSYNCH ON THE FERTILITY OF DAIRY COWS,” ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ), vol. 22, no. 2, pp. 69–79, 2012, [Online]. Available: https://sid.ir/paper/147573/en

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