Factors affecting disposal trends in crossbreds cattle at closed organised farm
2003
Singh, M.K. | Gurnani, M. (National Dairy Research Institute, Karnal (India))
Karan Fries cows (1349), born during 1980 to 1991 were used to study the disposal trends. The animals died varied from 7.76 (1986) to 25.00% (1991) and culled from 12.12 (1991) to 33.62% (1981), over the years. Effect of age, inbreeding and year of birth was significant on disposal rate. Increase in culling and decrease in mortality rate with advance in age was evident. Inbreeding level above 6% had significantly adverse effect on culling. Maximum (6.80% of here strength and 50% of total death) mortality was recorded up to the age of 3 months. Intestinal infections and pneumonia were the main causes and accounted for 50% of total loss. Maximum culling (16.54%) occurred beyond 18 months of age. Poor growth (5.56%), reproductive disorders (2.13%), poor health (1.75%), locomotive disorders (1.49%), and late maturity (1.29%) were the important causes of culling. Higher incidences of mortality occurred during December, April, May and September because of prevailing extreme climatic conditions. The study suggests improvements in managemental measures and lowering of inbreeding to reduce the culling and mortality.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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