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Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 1992;5(2): 375-382.
https://doi.org/10.5713/ajas.1992.375    Published online June 1, 1992.
Factors affecting the lactation length and milk yield in Nili-Ravi buffaloes
M. A. Chaudhry
The effect of certain factors such as sex of calf, status of buffalo, season of calving, parity and sire on lactation length and total lactation yield was studied in 391 Nili-Ravi buffaloes. The average lactation length was 301.73 1.87 (mean SE) days with a range of 181 to 505 days whereas the average lactation yield was 2031.08 19.16 kg and ranged from 1023 to 6535 kg for 984 lactations. The differences in the means of lactation length and lactation yield due to the sex of calf were significant (p<0.05). The status of buffaloes had a significant (p<0.05) effect on lactation length but its effect on lactation yield was non-significant. The season of calving had no effect on lactation length but it influenced the lactation yield significantly. The milk yield was highest (2150.81 43.52 kg) in buffaloes which calved in spring and lowest (1959.92 30.83 kg) in autumn. The effect of parity on both traits under study was significant (p<0.01). The maximum and minimum lactation lengths of 309.82 3.96 and 284.16 7.17 days were observed in the first and sixth lactations, respectively. The milk yield was maximum (2150.38 58.79 kg) in the seventh lactation and minimum (1818.31 60.04 kg) in the sixth lactation. The influence of sire was significant on lactation length (p<0.05) and milk yield (p<0.01)
Keywords: Nili-Ravi Buffaloes; Lactation Length; Lactation Yield; Status of Buffalo; Sire

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