Study on the productive and reproductive performances of red Chittagong cow at rural areas in Chittagong.

The result of the collected data revealed different reproductive performances of Red Chittagong Cow such as age at puberty 2.68±1.72 years, days required to first heat during post partum period 3.08±1.00 months, calving interval 14.00±1.19 months, service per conception 1.36±0.60 and gestation length 279.92±5.27 days. In this survey some data were recorded to observe the production performances of Red Chittagong Cows. Milk production per day and lactation length was 2.10±0.63 liter and 238.8±30.6 days, respectively. The maximum milk production per day was 4 liter per cow and the minimum production was 1 liter per day per cow. The cow produced 1.88±0.51 liter milk supplied with roughage only on the other hand 2.42±0.57 liter milk produced by the cow supplied some amount of concentrate along with roughage. The level of production difference between two groups were highly significant (p<0.0001). Key Words: Lactation; Puberty; Service per conception; RCC. DOI: 10.3329/ujzru.v28i0.5282 Univ. j. zool. Rajshahi Univ. Vol. 28, 2010 pp. 27-31