Vol. 9, Issue 1, Part I (2024)

Author(s): Radha Rani Sawami, Virendra Kumar, Anil, Rajesh Kumar Bochlya and Priyanka Swami

Abstract: The present study was conducted on 274 Kankrej cattle maintained at Livestock Research Station, Kodamdesar, Rajasthan University of Veterinary and Animal Sciences, Bikaner, calved during the period 2012 to 2022. The aim of present investigation was to access the effect of parity, season and period (non-genetic factors) on first overall and lifetime production traits in Kankrej cattle. The traits evaluated as overall lactation length (LL), overall dry period (DP), overall lactation total milk yield (LTMY) and overall calving interval (CI), lifetime milk yield as total milk yield up to 5 lactations (LTMY5) and lifetime milk yield as total milk yield up to 7 lactations (LTMY7). To estimate the effect of non-genetic factors, computer package programme, IBM SPSS version 26.0 was used for least-squares analysis. The least-squares means estimated for overall LL, DP, LTMY, CI were 222.291±2.244 days, 124.429±1.767 days, 1499.066±2.296 kg, and 406.94±2.296 days, respectively. The least-squares means for lifetime traits in Kankrej cattle were 6940.839±299.539 kg for lifetime milk yield upto5 lactations (LTMY5) and 10530.929±765.164kg for lifetime milk yield upto7 lactations (LTMY7), respectively.