Volume 53 (2022)
Volume 52 (2021)
Volume 51 (2020)
Volume 50 (2019)
Volume 49 (2018)
Volume 48 (2017)
Volume 47 (2016)
Volume 46 (2015)
Volume 45 (2014)
Volume 44 (2013)
Volume 43 (2012)
Volume 42 (2011)
Volume 41 (2010)
Volume 40 (2009)
Volume 39 (2009)
Effects of summer and winter temperature–humidity index on performance of some reproductive traits of high producing dairy cows

Hadi Dashti; Ahmad Riasi; Mohammad Ali Edris; Golam-Reza Gohrbani; Hossein Omidi-Mirzaei

Volume 47, Issue 2 , October 2016, , Pages 321-327


  The aim of this study was to consider reproductive performance parameters and blood progesterone concentration changes in high-producing dairy cows (39±2 kg per day) after artificial insemination, in summer and winter. 270 heads of Holstein dairy cattle were choose in three big dairy farms, and ...  Read More

Effects of Different Dry Period Length on the Reproductive and Productive Performance of Holstein Cows During the Subsequent Lactation

fatemeh amini; hamid amanloo; mohammad javad zamiri; najme eslamian

Volume 43, Issue 2 , September 2012, , Pages 183-191


  To evaluate the effects of different dry period lengths on milk yield, milk composition, reproductive performance and energy balance in dairy cows, 30 Holstein breeds (average 270 days pregnant) were made use of in a randomized complete block design. Cows were assigned to three treatments (60, 45 and ...  Read More

A Study of the Performance of some of Production, Reproductive and Economic Traits of Cattle in Smallholder Dairy Farms in Chaharmohalo Bakhtiari Province

Mahmoud Vatankhah; Mehrab Faraji

Volume 42, Issue 4 , March 2012, , Pages 285-296

  Four hundered and ninety five (495) smallholder dairy farms active in 52 villages of different cities in Chaharmohalo Bakhtiari Province, keeping 1321 lactating within a total of 2811 mature cows (lactating and dry) were used. These herds were taken during winter 2009 to summer 2010 to assess some of ...  Read More