Abstract
The research was conducted on 78 lactation records of 78 Deoni cows over three years to analyze the effect of non-genetic factors on lactation performance traits. Data of lactation records were analyzed to determine the effect of age, parity, a period of calving and season of calving on lactation traits, viz., lactation milk yield (LMY), peak milk yield (PMY), lactation length (LL) and persistency of lactation. The findings revealed that age group and parity had a significant (p ≤0.05) effect on lactation milk yield, but not the period of calving and season of calving. Further, only the parity had a significant (P≤0.05) effect on peak milk yield of Deoni cattle but not the age group, period of calving, and season of calving. The other two traits, namely lactation length, and persistence was not influenced significantly by any the non-genetic factors evaluated in Deoni cattle.
Highlights
As per 20th Livestock Census of 2019, the total livestock population in India is 535.78 million
The overall lactation performance of 78 Deoni cows studied over three years period revealed the mean lactation milk yield of 1297.99 ± 54.41 kg, peak milk yield 6.19 ± 0.147 kg, lactation length of 291.68 ± 6.789 days and persistency of lactation as 207.68 ± 5.105 days
The cattle of 9-11 years age group showed significantly (p ≤0.05) higher lactation milk yield (LMY) when compared with animals of 5-6 years and 3-5 years age groups, but it was statistically similar to that of 7-9 years and >11 years of age groups
Summary
As per 20th Livestock Census of 2019, the total livestock population in India is 535.78 million. The range of lactation milk yield is reported to be 293.3±76.0 kg to 868.24±49.56 kg, indicating a large variation among the population and great scope for improvement (Dongre et al, 2017). The study was carried out to analyze the effect of nongenetic factors on lactation performance traits like lactation milk yield (LMY), peak milk yield (PMY), lactation length (LL) and persistency of lactation in Deoni cattle at Livestock
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