STUDY OF THE EFFECTS OF ENVIRONMENTAL FACTORS ON REPRODUCTION PERFORMANCE IN HOLSTEIN COWS OF GUILAN PROVINCE

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

GHAFARIZADEH A.A.; MOHAMMADI M.; SHAD PARVAR A.A.A.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Agricultural Sciences and Technology Year:2005 | Volume:19 | Issue:2 Page(s): 161-170

Download Full-Text

Persian Verion

View:

1,234

Download:

Cites:

Information Journal Paper

Title

STUDY OF THE EFFECTS OF ENVIRONMENTAL FACTORS ON REPRODUCTION PERFORMANCE IN HOLSTEIN COWS OF GUILAN PROVINCE

Author(s)

GHAFARIZADEH A.A. | MOHAMMADI M. | SHAD PARVAR A.A.A. | Issue Writer Certificate

Keywords

REPRODUCTIVE PERFORMANCEQ4

HOLSTEIN COWSQ4

Abstract

In this research, 8760 records of dairy cattle of a farm (with two herds) in Guilan province were studied. Effects of season, year, sex of calf, lactation number, herd, milk yield (first 150-day) and age of cow on reproduction performance were evaluated. Means of days to first service (DFS), days open (DO), service per conception (S/C) and calving interval (Cl) were 86.64±0.34 days, 124.57±0.63days, 2.17±0.02 time and 409±0.71 days, respectively. Effect of season on reproductive factors was significant (P<0.01). REPRODUCTIVE PERFORMANCE in autumn and spring was maximum and minimum, respectively; also the year effect was significant (P<0.01). Effect of lactation number on reproductive factor was significant (P<0.05). Effect of age was significant on DO, DFS and Cl (P<0.01), However its effect on S/C was not significant (P>0.05). Effect of milk yield on DFS and S/C was significant (P<0.01). Effect of sex of calf on REPRODUCTIVE PERFORMANCE was not significant (P>0.01). The results of this study suggest that, HOLSTEIN COWS of Guilan province have the most suitable reproductive condition in lactation number 3 and autumn calving. Also milk yield (first 150-day) has significant effect on days to first service and service per conception.

Cites

No record.

References

No record.

Cite

APA: Copy

GHAFARIZADEH, A.A., MOHAMMADI, M., & SHAD PARVAR, A.A.A.. (2005). STUDY OF THE EFFECTS OF ENVIRONMENTAL FACTORS ON REPRODUCTION PERFORMANCE IN HOLSTEIN COWS OF GUILAN PROVINCE. AGRICULTURAL SCIENCES AND TECHNOLOGY, 19(2), 161-170. SID. https://sid.ir/paper/22459/en

Vancouver: Copy

GHAFARIZADEH A.A., MOHAMMADI M., SHAD PARVAR A.A.A.. STUDY OF THE EFFECTS OF ENVIRONMENTAL FACTORS ON REPRODUCTION PERFORMANCE IN HOLSTEIN COWS OF GUILAN PROVINCE. AGRICULTURAL SCIENCES AND TECHNOLOGY[Internet]. 2005;19(2):161-170. Available from: https://sid.ir/paper/22459/en

IEEE: Copy

A.A. GHAFARIZADEH, M. MOHAMMADI, and A.A.A. SHAD PARVAR, “STUDY OF THE EFFECTS OF ENVIRONMENTAL FACTORS ON REPRODUCTION PERFORMANCE IN HOLSTEIN COWS OF GUILAN PROVINCE,” AGRICULTURAL SCIENCES AND TECHNOLOGY, vol. 19, no. 2, pp. 161–170, 2005, [Online]. Available: https://sid.ir/paper/22459/en

Related Journal Papers