Factors affecting weight and age at first calving, first lactation milk yield in Gir cows

The present investigation was undertaken to access first lactation total milk yield, first lactation length, productive life, herd life and total life. Breeding information were used from the history sheet registers and herd inventory registers of Hariana cattle maintained at DUVASU farm, Mathura and Babugarh farm, Hapur. The data of productive animals with date of calving from 1966 to 2018 and date of birth from 1962 to 2013 were collected for the study. The overall averages for FLTMY, FLL, PL, HL and TL were estimated as 971.2±16.9 litres, 328.2±3.8 days, 2019.1±42.1 days, 2251.8±43.9 days and 3915.7±44.2 days, respectively. The overall least-squares mean of 961.3±24.1 litres, 331.6±5.9 days, 2285.2±64.9 days, 2489.9±69.1 days and 4219.4±70.0 days was observed respectively for the above traits. Season of calving had significant effect on first lactation length and period of calving had significant effect on first lactation total milk. Farm, period of birth and AFC age group had significant effect on PL, HL and TL of Hariana cattle. The heritability for FLTMY and FLL was moderate to high in Hariana cattle.

Section: Resultsmentioning

confidence: 84%

Genetic study of important economic traits in Hariana cattle

SHETKAR

Kumar

Singh

et al. 2023

“…The least squares means of birth weight in crossbred calves was 21.92±0.10 kg. It was slightly lower as compared to other crossbreds like Frieswal (26.93 kg) (Gaur et al 2006, Kumar et al 2008, Karan-Fries (27.3 kg) (Singh and Gurnani 2002), Karan-Swiss (28.03 kg) (Mandal and Sachdeva 1999) and Sunandini (28.4 kg) (Muhammed et al 2015). The difference in birth weight in various crossbreds could be due to the genetic makeup of the herds and management practices adopted at different farms.…”

Section: Resultsmentioning

confidence: 78%

Investigating reasons for lower birth weight in crossbred calves

Upadhyay

Gaur

Bharti

et al. 2017

The present study was carried out to investigate the reasons of lower birth weight in crossbred (50-75% Exotic and 25-50% Hariana) calves. The data on birth weight of 2,102 crossbred calves, progeny of 22 sires over a period of 11 years from 2005 to 2015 were analyzed under investigation using Least Squares analysis. Heritability of birth weight was calculated using half sib correlation method. The observed parameters were period of calving, season of calving, sex of calf, parity of dam, age of dam at calving, weight of dam at calving and sire of calf. Research results revealed that average birth weight of crossbred calves was 21.92 kg. The effect of period of calving, season of calving, sex of calf, age of dam at calving, weight of dam at calving and sire of calf was statistically significant on birth weight. Birth weight showed increasing trend across the periods. The heaviest (9.47% more than rainy) birth weight was observed for calves, born in hot-dry (summer) season whilst, it was the lowest in those born inhot-humid (rainy) season. Male calves were heavier (3.66% more) at birth than the female calves. Cows more than 6 years of age and 400 kg body weight produced the heaviest calves. Five sires (22.72%) had their calves with more than 24 kg birth weight. Heritability of birth weight in crossbred calves was moderate (0.24±0.08) reflecting the ample scope of improvement through proper feeding and care of dam.

“…Farm and period of birth had significant effect on age at first calving. Singh et al (2010) and Doharey (2012) had observed similar estimates for age at first calving. Doharey (2012) reported significant effect of farm and period of birth.…”

Section: The Model Used Was As Followsmentioning

confidence: 70%

Age at first calving and lifetime performance of Hariana cattle at organized farms

SHETKAR

Kumar

Singh

et al. 2022

The present investigation was undertaken to access age at first calving, actual lifetime milk yield per day of productive life, actual lifetime milk yield per day of herd life and actual lifetime milk yield per day of total life. The non-genetic factors such as period of birth, season of birth, AFC age group and farms on these traits were studied by least-squares analysis and the means were compared using Duncan's multiple range test. The least-squares means for age at first calving, actual lifetime milk yield per day of productive life, actual lifetime milk yield per day of herd life and actual lifetime milk yield per day of total life were estimated as 1668.3±16.6 days, 1.878±0.04 litres/day, 1.735±0.05 litres/day and 1.029±0.03 litres/day respectively. Farm and period of birth had significant effect on age at first calving, actual lifetime milk yield per day of herd life and actual lifetime milk yield per day of total life. In actual life time milk yield per day of productive life, period of birth had significant effect. AFC class had significant effect on actual lifetime milk yield per day of total life.