Effect of non-genetic factors on milk production of Holstein Friesian Deoni crossbred cows

Abstract

This research was conducted to evaluate the effect of non-genetic factors on milk production of Holstein Friesian × Deoni crossbred cows. Data representing 256 HF × Deoni crossbred cows from cattle crossbreeding project with 1485 total records of lactation over a 30 years period were analyzed to determine the effects of period of calving, season of calving, age at first calving and parity on milk production. The overall least squares mean of lactation milk yield, 305 days milk yield, lactation length, and milk yield per day of lactation length were 1661.35±15.17, 1707.25±13.25, 296.80±2.29 and 5.65±0.04 kg, respectively. All sources of variation were significant except season of calving for 305 days milk yield and lactation length; age at first calving for 305 days milk yield and milk yield per day of lactation length. Milk production was depressed for cows calving in summer. First lactation cows had lowest milk production, and highest production occurred in 5 th parity. It was therefore, concluded that, HF × Deoni crossbred cows were affected by non-genetic factors.

Genetic Evaluation for Milk Production Traits A Herd of Friesian Cattle Raised in Egypt التقییم الوراثی لصفات إنتاج اللبن فی قطیع من أبقار الفریزیان المرباه فی مصر

“…Mustafa and Serdar (2009) noticed that year of calving had significant effect on LL for Holstein cow. This result is in close agreement with reports by Hussain et al, (2006), Wondifraw et al, (2013) and Hassan and Khan (2013). The highest LL were observed in the fourth parity (8720.67) then decreased thereafter.…”

Persistency Measurement in HF × Sahiwal Cattle

“…Significant effect of period of calving on persistency was reported by Shah et al, (1983) in HF crossbred and Patond et al, (2014) in Jersey cattle by Ludwick and Peterson method. Similar significant effect of period of calving on persistency has also been reported by Wondifraw et al, (2013) and Garudkar et al, (2015) by Mahadevan method. However, non-significant effect of period of calving on persistency has been reported by Kumar and Singh (2006) in Karan Fries cattle and Patond et al, (2014) in Jersey cattle by Mahadevan method.…”

Potency of Culled Saanen Crossbred Goat in Supplying Raw Meat for Traditional Thai Butchery

“…The trend is similar with the result between dairy cattle (22.39%) vs beef cattle (20.85%) (Lizaso et al, 2011). It was noticed that dairy breed reached earlier maturity than beef breed (Wondifraw et al, 2013). Maturity level of animal breed determines collagen properties.…”