slugEffect of Calf Birth Weight on Milk Production of Holstein Dairy Cattle in Desert Climate
Journal Title: Journal of Animal Behaviour and Biometeorology - Year 2016, Vol 4, Issue 3
Abstract
The hypothesis in this study was that calf birth weight (CBW) would effect on cow's milk production. Data were collected from two commercial dairy milking 15,000 Holsteins in central region of Iran with desert climate from 2006 to 2012. Animals were enrolled at parturition until 7,737 calvings were available for analysis. Data consisted of on-farm measurements of calf birth weight and milk production, and data were analyzed using a multivariable regression model. Independent variables were parity, herdyear-season, calving interval, calving age, retained placenta, days open, dry period length, days in milk, linear and quadratic CBW. The mean CBW was 40.84 ± 4.9 kg (SD) with a range of 20 to 60 kg. There was a trend for milk305 based on calf birth weight, i.e., the amount of milk305 of dam was significantly dependent on that weight of calf was born (P < 0.01). Cows with CBW between 20 and 25 kg had the lowest of milk production. By increasing of CBW range up to 40 and 45 kg, the trend of milk production increased and then decreasing trend observed. In conclusion, calf birth weight could be considered as an important trait in dairy cattle breeding programs in desert climate.
Authors and Affiliations
Rabie Rahbar ▪ Rohullah Abdullahpour ▪ Ali Sadeghi-Sefidmazgi
Keywords
Related Articles
- EP ID EP17917
- DOI http://dx.doi.org/10.14269/2318-1265/jabb.v4n3p65-70
- Views 452
- Downloads 23
slugSeasonal and diurnal differences in the responses of Girolando cows to the thermal environment of Piauí, semiarid coast of Brazil
The objective of this research was to evaluate the adaptive behavior of Girolando cows to the Piauí semiarid region. Breed data from 10 cows were used to study correlations between the physiological thermoregulatory...
slugDetermination of physiological parameters and thermal gradients of Anglo-nubian goatling in Brazilian semiarid
The aim of this research was to evaluate the thermal gradients of Anglo nubian goatling fed artificially and maintained under the same environmental conditions in semiarid. Were used 22 goatling aged 90 days and in th...
slugInfrared thermography applied to rhea (Rhea americana)
Infrared thermography is an innovative tool that has been used in several studies involving animal. This tool used to study heat stress, thermoregulation, behavior, disease diagnosis, mainly in the animal production a...
slugSexually inexperienced anestrous goats are able to exhibit sexual behaviours exposed to sexually active bucks
The aim of this study was to determine whether sexually inexperienced females could display proceptivity and receptivity behaviours as the experienced, in the first exposure to males. Three groups of females (n=9 each...
slugBioclimatic zoning for beef cattle in Brazil with the aid of intelligent systems
A diversidade de variáveis climáticas é necessário estabelecer o nível de conforto. Assim, o uso de sistemas inteligentes podem ajudar a obter um valor único que expressa a condição de que o animal está em. Este trabalho...