Citation
Saadiah J., . and Ahmad J., . and Yaakub H., . and Azizah A., . and Ahmad Nazri A. R., . Frequency of oestrus signs and pregnancy rates in oestrus synchronised Kedah-Kelantan crossbred cows offered two metabolizable energy levels. pp. 1-9. ISSN 1394-3227
Abstract
Synchronisation of oestrus in cattle can facilitate the use of artificial insemination by reducing the time needed for detection of oestrus compared to cows entering oestrus spontaneously. The purpose of the study was to determine the oestrous signs characteristics and pregnancy rates in Kedah-Kelantan crossbred cows offered two levels of metabolizable energy. The study was conducted on 30 Kedah-Kelantan crossbred cows (of mean age: 3-5 y average body weight: 300 kg parity: first to third). Cows were allocated into two diet groups based on maintenance energy (ME): single (1ME) and double (2ME) dietary energy requirement (0.02 Mcal /kg body weight) with crude protein level of 15 based on ARC (1980) recommendation. The results showed that the proportion of cows expressing standing oestrus in first and second oestrous cycles were 73.3 and 66.7 (p0.05) and 80 and 53.3 (p0.05) in 1ME and 2ME diet groups respectively. The percentage of cows expressing oestrus was not significantly different between the first and second cycles of oestrus. There was a decrease in the percentage of cows pregnant for 1ME diagnosed at day 30 (78.6) and day 90 (57.1) post AI whereas cows on 2ME showed no significant difference (p0.05) in percentage of pregnancy at day 30 (66.7) and day 90 post AI (53.3). However the percentage of cows pregnant in the 1ME group was not significantly different compared with 2ME group (p0.05). In conclusion the diet formulated to provide twice the metabolizable energy requirement for maintenance was not able to accelerate the frequency of cows showing oestrous signs and pregnancy rate of Kedah-Kelantan crossbred cows.
Download File
Full text available from:
Official URL: http://www.msap.my/pdf/mjas_17_2/1-Frequency%20of%...
|
Abstract
Synchronisation of oestrus in cattle can facilitate the use of artificial insemination by reducing the time needed for detection of oestrus compared to cows entering oestrus spontaneously. The purpose of the study was to determine the oestrous signs characteristics and pregnancy rates in Kedah-Kelantan crossbred cows offered two levels of metabolizable energy. The study was conducted on 30 Kedah-Kelantan crossbred cows (of mean age: 3-5 y average body weight: 300 kg parity: first to third). Cows were allocated into two diet groups based on maintenance energy (ME): single (1ME) and double (2ME) dietary energy requirement (0.02 Mcal /kg body weight) with crude protein level of 15 based on ARC (1980) recommendation. The results showed that the proportion of cows expressing standing oestrus in first and second oestrous cycles were 73.3 and 66.7 (p0.05) and 80 and 53.3 (p0.05) in 1ME and 2ME diet groups respectively. The percentage of cows expressing oestrus was not significantly different between the first and second cycles of oestrus. There was a decrease in the percentage of cows pregnant for 1ME diagnosed at day 30 (78.6) and day 90 (57.1) post AI whereas cows on 2ME showed no significant difference (p0.05) in percentage of pregnancy at day 30 (66.7) and day 90 post AI (53.3). However the percentage of cows pregnant in the 1ME group was not significantly different compared with 2ME group (p0.05). In conclusion the diet formulated to provide twice the metabolizable energy requirement for maintenance was not able to accelerate the frequency of cows showing oestrous signs and pregnancy rate of Kedah-Kelantan crossbred cows.
Additional Metadata
Item Type: | Article |
---|---|
AGROVOC Term: | Oestrus |
AGROVOC Term: | Crossbreds |
AGROVOC Term: | Cattle |
AGROVOC Term: | Ai (artificial insemination) |
AGROVOC Term: | Oestrous cycle |
AGROVOC Term: | Metabolizable energy |
AGROVOC Term: | Cows |
AGROVOC Term: | Body weight |
AGROVOC Term: | Crude protein |
AGROVOC Term: | Diet treatment |
Geographical Term: | Malaysia |
Depositing User: | Ms. Suzila Mohamad Kasim |
Last Modified: | 26 Apr 2025 14:36 |
URI: | http://webagris.upm.edu.my/id/eprint/21501 |
Actions (login required)
![]() |
View Item |