Effect of lameness (hoof disorders) on productivity of Karan Fries crossbred cows.
In present study production performance of 96 lame cows was compared with 67 healthy cows. No significant effect of parity and year of calving on milk yield were observed but the effect of season of calving was significant (P < 0.01). Effect of lameness on milk yield at the second, third and fourth months and 305 days was highly significant (P < 0.01), and was also significant (P < 0.05) on lactation yield of the fifth and tenth months. The effect of lameness on monthly and 305-day milk yield was significant (P < 0.01) only for those cows diagnosed lame before calving and during the first month of lactation. The differences in mean monthly yield were highly significant (P < 0.01) at the second, third and fourth months; and significant (P < 0.05) in the first and fifth months. The loss in the first lactation month of cows which were diagnosed as lame in the second month, was found to be significant (P < 0.05). Thus the yield of the month previous to the diagnosis (sub-clinical stage) was also affected. A significant (P < 0.01) total loss of 498.95 kg of milk yield was observed during a period of 305 days.
Livestock Production and Management, National Dairy Research Institute, Karnal, Haryana, India. yuvi_only@rediffmail.com
Yajuvendra
Y
Singh
Surender Singh
SS
Lathwal
Atish Kumar
AK
Chakravarty
Ashok Kumar
AK
Gupta
Tushar Kumar
TK
Mohanty
Thiruvothur Venkatesan
TV
Raja
Roshan Lal
RL
Dangi
Biplob Kumer
BK
Roy
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000503:physiopathology*; D005260:Female; D006724:Hoof and Claw; D006824:Hybridization, Genetic; D007774:Lactation; D007794:Lameness, Animal / Q000503:physiopathology*; D008892:Milk; D010298:Parity; D012621:Seasons; D013997:Time Factors