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.
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.
The present study was aimed to study lifetime milk production of Hariana cattle in organized farms. The nongenetic factors such as period of calving/birth, season of calving/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 leastsquares means for first dry period, lifetime 2 milk yield, lifetime 3 milk yield, lifetime 4 milk yield, lifetime 5 milk yield and actual lifetime milk yield were estimated as 198.8±6.1 days, 1802.8±42.3 litres, 2797.0±68.6 litres, 3886.6±100.3 litres, 4984.9±141.9 litres and 4598.3±144.7 litres respectively. Farm, season of calving and period of calving had significant effect on first dry period. Farm and AFC class had significant effect on actual lifetime milk yield. Period of birth had significant effect on lifetime 2 milk yield, lifetime 3 milk yield, lifetime 4 milk yield, lifetime 5 milk yield and actual lifetime milk yield. Season of birth had significant effect on lifetime 3 milk yield, lifetime 4 milk yield and lifetime 5 milk yield. The autumn season born animals had lowest first dry period and highest lifetime 2 milk yield, lifetime 3 milk yield, lifetime 4 milk yield, lifetime 5 milk yield and actual lifetime milk yield.
The present study was conducted on performance records of 648 Hariana cattle with respect to first lactation and lifetime traits spread over a period of 57 years (1962-2018) from DUVASU farm, Mathura and 23 years (1995– 2017) from State livestock farm Babugarh, Hapur. Lifetime production traits, viz. Lifetime 2 Milk Yield (LT2MY), Lifetime 3 Milk Yield (LT3MY), Lifetime 4 Milk Yield (LT4MY) and Lifetime 5 Milk Yield (LT5MY) were predicted by multiple linear regression analysis. Step-wise regression procedure was used to predict the lifetime milk yield from first lactation traits, viz. age at first calving (AFC), first calving interval (FCI) and first lactation total milk yield (FLTMY). The optimum models were selected with the help of Akaike information criterion (AIC), Bayesian information criterion (BIC), Mallow’s conceptual predictive value and variance inflation factor. The models with lower AIC, BIC and RMSE values and with higher co-efficient of determination were selected as optimum. The optimal models for lifetime production traits, viz. LT2MY, LT3MY, LT4MY and LT5MY with co-efficient of determination were 75.46%, 66.63%, 59.4% and 55.03%, respectively.
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