FACTORS AFFECTING ON THE CONCEPTION RATE OF DAIRY CATTLE AT FIRST SERVICE IN CHAR AREAS OF NORTHERN BANGLADESH

Abstract

The study was conducted on the char areas of eight districts in namely Bogra, Sirajgonj, Pabna, Jamalpur, Kurigram, Nilphamari, Rangpur, Gaibandha, respectively. However, data was collected from January, 2012 to December, 2013 by the structured questionnaires, informal interview and group discussion. A total of 800 local, 800 Holstein-Frisian (LxHF) and 800 Red Chittagong (LxRC) crossbred cows were selected for this study. Feeding and management of the experimental animals were uniform throughout the year. Animals were vaccinated and dewormed regularly. Cows generally were grazed in the field and supplied 5—6 kg straw daily at evening. In improved feeding system cows were grazed in the field and supplied ready feed (a mixture of rice polish, wheat bran, broken rice and oil cake; @ 2-3.5 kg/d/head) with 5-6 kg straw. The cows accessed ad libitum © fresh drinking water with iodized salt.