A STUDY ON MILK AND FAT PRODUCTION AND SOME REPRODUCTIVE TRAITS OF COWS IN DAIRY HERDS AROUND YAZD

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ESMAEILZADEH A.; MIRAEI ASHTIANI S.R.; ROUZBAHAN Y.

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Journal: Year:2003 | Volume:15 | Issue:3-4 (56-57 IN ANIMAL AND FISHERIES SCIENCES) Page(s): 25-31

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Title

A STUDY ON MILK AND FAT PRODUCTION AND SOME REPRODUCTIVE TRAITS OF COWS IN DAIRY HERDS AROUND YAZD

Author(s)

ESMAEILZADEH A. | MIRAEI ASHTIANI S.R. | ROUZBAHAN Y. | Issue Writer Certificate

Keywords

YAZDQ3

HOLSTEIN COWSQ3

MILK AND FAT PRODUCTIONQ4

REPRODUCTIVE TRAITSQ4

HEAT STRESSQ2

Abstract

The MILK AND FAT PRODUCTION and some REPRODUCTIVE TRAITS of Holestein cows in 6 dairy herds around YAZD (central region of Iran) using 11200 records from 550 cows were studied. The estimation of least square means of corrected (2X, 3050, ME) milk yield, fat production and fat percentage were 6270.30±48.20, 217.70±1.87 kg and 3.50±0.02 percent, respectively. Effects of herd, year and season on milk and fat yield were significant (p<0.01). MILK AND FAT PRODUCTION of cows, in fall season calving were more than other seasons (p<0.01). The estimation of least square means of calving interval (Cl), days open, dry period, days in milking and age at first calving (AFC) were 382.00±4.49, 103.00±5.12, 75.00±3.39, 307.00±3.72 days and 28.00±0.35 months, respectively. Effect of year on Cl and AFC was significant (p< 0.01). The results suggest that, autumn calving can be used as a strategy for increasing MILK AND FAT PRODUCTION of Holestein cows in YAZD, in order to increase the economic efficiency of herds, AFC and Cl need to be improved.

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APA: Copy

ESMAEILZADEH, A., MIRAEI ASHTIANI, S.R., & ROUZBAHAN, Y.. (2003). A STUDY ON MILK AND FAT PRODUCTION AND SOME REPRODUCTIVE TRAITS OF COWS IN DAIRY HERDS AROUND YAZD. PAJOUHESH-VA-SAZANDEGI, 15(3-4 (56-57 IN ANIMAL AND FISHERIES SCIENCES)), 25-31. SID. https://sid.ir/paper/19168/en

Vancouver: Copy

ESMAEILZADEH A., MIRAEI ASHTIANI S.R., ROUZBAHAN Y.. A STUDY ON MILK AND FAT PRODUCTION AND SOME REPRODUCTIVE TRAITS OF COWS IN DAIRY HERDS AROUND YAZD. PAJOUHESH-VA-SAZANDEGI[Internet]. 2003;15(3-4 (56-57 IN ANIMAL AND FISHERIES SCIENCES)):25-31. Available from: https://sid.ir/paper/19168/en

IEEE: Copy

A. ESMAEILZADEH, S.R. MIRAEI ASHTIANI, and Y. ROUZBAHAN, “A STUDY ON MILK AND FAT PRODUCTION AND SOME REPRODUCTIVE TRAITS OF COWS IN DAIRY HERDS AROUND YAZD,” PAJOUHESH-VA-SAZANDEGI, vol. 15, no. 3-4 (56-57 IN ANIMAL AND FISHERIES SCIENCES), pp. 25–31, 2003, [Online]. Available: https://sid.ir/paper/19168/en

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