Test day yield, lactation curve and production potential of Gir cattle under hot and humid conditions of Tamil Nadu
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https://doi.org/10.56093/ijans.v91i12.119832
Keywords:
Gir, Hot and humid, Lactation curve models, Test day yieldAbstract
Test day milk yield records (5130), milk production and milk composition traits from 19 lactations of Gir cows collected for two years (2019 and 2020) were used to understand the performance of Gir breed in hot and humid conditions of Tamil Nadu. Different lactation curve models were used for modelling test day records and model diagnostics like adjusted R-square, BIC and RMSE were used to obtain the model of best fit. The mean test day yield, fat per cent, SNF (%), total milk yield, peak yield, days to attain peak yield and calving interval observed were 5.78 kg, 5.05%, 7.65%, 1507 kg, 9.23 kg, 46.5 days and 447 days respectively. Ali and Shaeffer model offered the best fit for lactation curve in Gir cows. Mahadevan method and Gamma function were used to calculate the persistency of milk yield which was obtained as 1.33 and 6.348 respectively. Results of the study indicated that Gir cattle were able to adapt themselves through maintenance of reproductive traits comparable with that of the native tract but the new humid environment has caused a slight decrease in the performance of milk production traits.Downloads
References
Araújo T P M, Rangel A H D N, Lima G F D C, Peixoto M G C D, Urbano S A and Bezerra J D S. 2018. Gir and Guzerat cow milk production and composition according to lactation stage, somatic cell count, physiological state and body condition. Acta Scientiarum Animal Sciences 40(1): 39352.
Bangar Y C and Verma M R. 2017. Non-linear modelling to describe lactation curve in Gir crossbred cows. Journal of
Animal Science and Technology 59(1): 1–7.
Biswal S, Thirunavukkarasu M, Selvam S, Venkataramanan R and Pandian A S S. 2017. Modeling lactation curve in jersey
crossbred cows. Journal of Entomology and Zoology Studies 5(6): 1282–85.
Daltro D D S, Padilha A H, Gama L T D, Silva M V G B D and Cobuci J A. 2021. Breed, heterosis, and recombination effects for lactation curves in Brazilian cattle. Revista Brasileira de Zootecnia 50.
Dora D S, Chourasia S K, Sahu S S, Paikra D and Bara S. 2020. Relationship between different milk constituents of GIR
cow. Journal of Entomology and Zoology Studies 8(2): 551–53.
Gadariya M R, Vataliya P H, Murthy K S and Gajbhiye P U. 2017. Breeding and lactation efficiencies, production profile,
productive herd life and lifetime productivity of Gir cows in their home tract. Indian Journal of Veterinary Sciences and
Biotechnology 13(02): 26–30.
Gajbhiye P U, Ahlawat A R, Sharma H A and Parikh S S. 2019. Effect of stage, season and parity of lactation on milk
composition in Gir cattle. International Journal of Current Microbiology and Applied Sciences 8(3): 2419–25.
Gaur G K, Kaushik S N and Garg R C. 2003. The Gir cattle breed of India-characteristics and present status. Animal Genetic
Resources 33: 21–29.
Jamrozik J and Schaeffer L R. 1997. Estimates of genetic parameters for a test day model with random regressions for
yield traits of first lactation Holsteins. Journal of Dairy Science 80(4): 762–70.
Mahadevan P. 1951. The effect of environment and heredity on lactation. II. Persistency of lactation. Journal of Agricultural
Science 41(1–2): 89–93.
Patbandha T K, Sabapara G P, Savaliya B D, Dash S K, Parikh S S and Ali M. 2020. Physical characteristics and production
performance of Gir cattle in India. International Journal of Livestock Research 10(8): 1–11.
Pereira R J, Ayres D R, Santana Junior M L, Faro L E, Vercesi Filho A E and Albuquerque L G D. 2019. Test-day or 305-day milk yield for genetic evaluation of Gir cattle. Pesquisa Agropecuária Brasileira 54.
R Core Team. 2020. R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. Version: 3.6.1.
Savaliya B D, Parikh S S, Ahlawat A R and Makwana R B. 2017. Comparative efficiency of various mathematical functions of lactation curve in Gir cattle using weekly milk yields. International Journal of Livestock Research 7(5): 112–20.
Savaliya B D, Parikh S S, Gamit P M and Gajbhiye P U. 2016. Environmental factors affecting economic traits in Gir
cattle. International Journal of Science, Environment and Technology 5(4): 2467–75.
Sharma N, Narang R, Kashyap N, Kumari S, Kaur S and Ratwan P. 2018. Genetic analysis of persistency in HF crossbred cattle at an organized farm of northern India. Tropical Animal Health and Production 50(6): 1219–25.
Tekerli M, Akinci Z, Dogan I and Akcan A. 2000. Factors affecting the shape of lactation curves of Holstein cows from the
Balikesir province of Turkey. Journal of Dairy Science 83(6): 1381–86.
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