Herd Structure, Performance Traits, Pattern of Calving and Culling in an Organized Large Herd of Gir Cattle

M. R. Gadariya, P. H. Vataliya, K. S. Murthy, H. H. Savsani, P. U. Gajbhiye

Abstract


Herd structure and herd performance traits of Gir herd of Cattle Breeding Farm, JAU, Junagadh,
Gujarat was studied utilizing monthly data over a period of 10 years (2001-2010). A herd with an
average of 110 Gir cows had average total strength of 388.38±3.09 and total adult units (AUs) of
259.27 ±13.42. The total females present in the herd were 71.82%. The Gir herd consisted of 28.98
% cows, 22.02 % breedable heifers, 22.34 % calves (female + male) and 12.33 % males above
1 year. Wet average and herd average were 6.77±0.10 and 3.84±0.06 lit/d/cow, and % milch cows
and number of milch cows were 57.03±0.85 and 63.12±1.42, respectively. Effect of month was
significant on the herd average only. All herd performance traits were significantly influenced by
year. Return over feed cost (ROFC) at variable feed cost was estimated to be 116.36±4.24 % at
market rate of milk. Calving incidence was significantly (P less than 0.05) influenced by month. Majority (42.08
%) of calving occurred during September to December. Of 562 animals disposed of, the maximum
proportion (33.96 %) was cows principally due to old age (>6 lactation) and low yield. Maximum
cows, 26.21% were disposed of in their 3rd lactation. Growing/breeding males were sold @ 28.57%
and castrated males to the tune of 22.32 %. The correlations among the herd structure and
performance traits of the herd were negative, medium in magnitude and significant, - 0.21 to - 0.29
with wet average, -0.16 to -0.21 with herd average and -0.25 to -0.73 (P less than 0.05) with % ROFC.
For the Gir herd under the study, herd structure of 30-33% cows, 18-21% breedable heifers and
72-75% total female proportion resulted in optimum wet average (>7.32 lit/d/milch cow) and herd
average (> 4.17 lit/d/cow) and also higher ROFC >139.6 %.

Keywords


Gir cattle, Herd structure, Herd performance, Calving pattern, Culling.

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DOI: http://dx.doi.org/10.21887/ijvsbt.v13i03.10605

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