The effects of dry period length on cow milk yield and milk components in commercial Holstein dairy herds

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MIRZAEI ALAMOUTI HAMIDREZA; Shapourzadeh Ali; AKBARI PABANDI KAMRAN; Zahmatkesh Davood

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Journal: Iranian Journal of Animal Science Year:2017 | Volume:47 | Issue:4 Page(s): 599-608

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Title

The effects of dry period length on cow milk yield and milk components in commercial Holstein dairy herds

Author(s)

MIRZAEI ALAMOUTI HAMIDREZA | Shapourzadeh Ali | AKBARI PABANDI KAMRAN | Zahmatkesh Davood | Issue Writer Certificate

Keywords

Dry periodQ2

milk componentQ2

milk yieldQ2

protein percentQ2

Abstract

The aim of this study was investigating the effects of Dry period length on milk production and milk component in commercial large dairy herds using 2143 cow records. The Cows were classified according to Dry period length in ≤ 45, 45-51, 52-65, 66-76 and ≥ 75 days. milk yield and contents were recorded during 6 to 12 months. Data were analyzed using the MIXED MODEL procedure of SAS. Results indicated that reduced Dry period length to less than 45-day reduced milk production yield, and changes in body condition score and rate of retained placenta was increased. Milk fat content decreased none linearly with increasing Dry period length and it was the least when length of Dry period was 52-65 days. Dry period length cubically affected protein content of milk; protein content was decreased and then increased by increasing Dry period length. Generally, the results showed that reduceing Dry period length to less than 45 day had negative effects on health, milk yield and milk components.

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APA: Copy

MIRZAEI ALAMOUTI, HAMIDREZA, Shapourzadeh, Ali, AKBARI PABANDI, KAMRAN, & Zahmatkesh, Davood. (2017). The effects of dry period length on cow milk yield and milk components in commercial Holstein dairy herds. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), 47(4 ), 599-608. SID. https://sid.ir/paper/193654/en

Vancouver: Copy

MIRZAEI ALAMOUTI HAMIDREZA, Shapourzadeh Ali, AKBARI PABANDI KAMRAN, Zahmatkesh Davood. The effects of dry period length on cow milk yield and milk components in commercial Holstein dairy herds. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)[Internet]. 2017;47(4 ):599-608. Available from: https://sid.ir/paper/193654/en

IEEE: Copy

HAMIDREZA MIRZAEI ALAMOUTI, Ali Shapourzadeh, KAMRAN AKBARI PABANDI, and Davood Zahmatkesh, “The effects of dry period length on cow milk yield and milk components in commercial Holstein dairy herds,” IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), vol. 47, no. 4 , pp. 599–608, 2017, [Online]. Available: https://sid.ir/paper/193654/en

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