The reproductive performance of Droughtmaster and Australian Commercial Cross cattle in Rancangan Daging/Penusu, Jelai-Gemas, Negeri Sembilan

Lazarus, Kevin (1987) The reproductive performance of Droughtmaster and Australian Commercial Cross cattle in Rancangan Daging/Penusu, Jelai-Gemas, Negeri Sembilan. [Project Paper] (Submitted)

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Abstract

The reproductive performance of Droughtmaster (DM) and Australian Commercial Cross (ACC) cattle was evaluated from a total of 206 records of breeding cows for the period from 1974 to 1985. Rainfall and environmental temperature data from 1981 to were also analysed. Per cent calvings and conceptions occurring wet and dry seasons were determined. The mean age at first calving for the DM was 1420 days and the ACC 1407 days. The average calving interval for the DM 588,days and for the ACC 564 days. These differences for the breeds were not significant (P>0.05). From the pooled data for the two breeds, the mean calving interval was 576 days. The calving interval for the third parity was significantly greater than parities 1, 2, 5 and 6 (P<0.05). The third and fourth calving intervals were the longest with the first, second, fifth and sixth being shorter than the mean of all calving intervals . Most calvings occurred during the two dry seasons from December to February (32.8%) and June to August (23.9%). This calvings corresponded to conceptions in the two wet seasons from March to May (33.8%) and September to November (25.9%). From the results of this study, a 10-week restricted mating period coinciding with the two wet seasons is recommended for this herd.

Item Type:	Project Paper
Subjects:	S Agriculture > SF Animal culture
Faculty:	Faculty of Veterinary Medicine
Depositing User:	Ms. Nordeena Abdul Aziz
Date Deposited:	14 Nov 2025 03:02
Last Modified:	14 Nov 2025 03:02
URI:	http://psaspb.upm.edu.my/id/eprint/2552

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