National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Present study was conducted on 116 lactating Jersey crossbred cattle maintained at Nandini Semen Station farm, Hessarghatta, Bengalauru, Veterinary college and research institute, Namakkal, and those maintained by farmers in surrounding areas of Namakkal, Tamilnadu. About 30 ml of milk samples were collected from lactating animals to estimate Somatic cell count (SCC) by digital somatic cell counter on same day of milk collection. California mastitis test (CMT) and Electrical conductivity (EC) meter were used for snapshot test. In California mastitis test out of 464 quarters screened 359 were normal (77.37%) while 105 were affected sub-clinically or clinically (22.63%) in different stages of lactation, seasons and parity respectively. The ANOVA test revealed that the effect of various seasons was strongly significant on TDMY (P £ 0.01) and moderately significant on (0.01<P £ 0.05) on somatic cell count. Higher test day milk yield were recorded during winter season (12.71 ± 0.71 Kg) than summer season (8.19 ± 0.55 Kg). The effect of parity on test day milk yield was found to be moderately significant (0.01<P£0.05). Higher Fat percent was observed during first (4.75 ± 0.17 %) and lower during fifth (4.28 ± 0.18%) parity. Higher solid not fat percentage were observed during second stage of lactation (9.21 ± 0.11%) and it was lower during third stage (9.06 ± 0.11%). Effect of season had moderately significant on (0.01<P£ 0.05) with front right quarter in quarter wise electrical conductivity meter test.
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