29-Title: Factors affecting age at first calving in gir cattle under rural conditions of Jharkhand state
Authors: SK Bansal, TP Kalbhor, B Shivarudrappa and AK Juneja
Source: Ruminant Science (2020)-9(1):141-144.
How to cite this manuscript: Bansal SK, Kalbhor TP, Shivarudrappa B and Juneja AK (2020). Factors affecting age at first calving in gir cattle under rural conditions of Jharkhand state. Ruminant Science 9(1):141-144.
The data of 747 Gir progeny born during the study period, maintained by 488 farmers spread across 14 districts of Jharkhand state in India having reached age at first calving (AFC) were collected and analysed. The data classified according to various parameters like Agro-climatic zones (Central and Northeastern Plateau, Southeastern Plateau sub zone, Western Plateau sub zone), farmer categories (General, OBC, SC and ST), progeny birth years (2010, 2011, 2012, 2013, 2014), birth seasons (summer, monsoon, winter) and sire to understand the effect of these factors on the age at first calving. Result indicated that overall age at first calving recorded was 44±0.26 months. Further results showed that factors like agro-climatic zones, progeny birth year and progeny sire had a significant effect on AFC, and it can be utilized in bringing about improvement in age at first calving in Gir cattle at the rural condition of Jharkhand state.
Bansal SK, Sinha AK, Gokhale SB and Bhagat RL (2017). Factors affecting age at first calving in Sahiwal cattle under Jharkhand rural conditions. International Research Journal of Natural and Applied Sciences 4(7):66-73.
Gaur GK, Kaushik SN and Garg RC (2020). The Gir cattle breed of India-characteristics and present status. http://www.fao.org/3/y4924t/y4924t07. Retrieved on 02-04-2020.
Hadia MY, Alkoiret IT, Gbangboche AB and Lokossou R (2011). Reproductive performance and milk production of Girolando cows in the Ranch of Kpinnou, South-West of Benin Republic. Journal of Animal and Veterinary Advances 10(19):2588-2592.
Hammoud MH, El-Zarkouny SZ and Oudah EZMn(2010). Effect of sire, age at first calving, season and year of calving and parity on reproductive performance of Friesian cows under semiarid conditions in Egypt. Archiva Zootechnica 13(1):60-82.
Madushanka DNN, Ranasingha VM, Bandara AMS, Mayurawansha WRAS and Magamage MPS (2016). Body condition score and locomotion score help to predict reproductive and health performances of dairy cattle. Ruminant Science 5(2):179-186.
Masama E, Kusina N and Sibanda S (2003). Reproduction and lactational performance of cattle in a smallholder dairy system in Zimbabwe. Tropical Animal Health and Production 35:117-129.
Mishra Geetesh, Siddiqui MF, Ingle VS, Pal RS and Meel MS (2017). Studies on genetic and phenotypic correlation of different productive and reproductive traits of Tharparkar cattle at organized farm. Ruminant Science 6(2):275-278.
Negussie E, Brannang E, Banjaw K and Rottmann OU (1998). Reproductive performance of dairy cattle at Assella livestock farm. Arsi. Ethiopia. I: Indigenous cows versus their F1 crosses. Journal of Animal Breeding and Genetics 115:267-280.
Singh A, Taylor CM and Gurung BS (1981). Studies on age at first calving in Gir cattle. Livestock Adviser 6:29-31.
Singh AP, Chakravarty AK and Mir MA (2018). Breeding performance of Murrah buffaloes in organised herd. Ruminant Science 7(2):207-212.
Singh VK, Singh CV, Kumar D and Kumar A (2005). Genetic evaluation of some economic traits in Sahiwal and its crossbreds. Indian Journal of Dairy Science 58(3):206-210.
Snedecor GW and Cochran WG (1967). Statistical Methods. Iowa State University Press, Iowa.
Tajane KR and Rai AV (1990). Efficiency of sire evaluation methods to improve milk yield of Sahiwal X Holstein Friesian cattle. Indian Journal of Animal Science 60:183-191.
Yadav Alok Kumar, Mukherjee Anupama, Mumtaz Shabahat, Kumar Suchit and Pathak Prajwalita (2017). Effect of non-genetic factors on milk yield and milk constituents in Karan Fries cattle. Ruminant Science 6(2):225-230.
Wakchaure RS and Meena R (2010). Factors affecting birth weight, age and weight at first calving in Sahiwal cattle. Indian Journal of Animal Research 44:173-177.