This study was conducted in North Sulawesi, Indonesia to identify the factors affecting reproductive efficiency and to determine the contribution of each factor in reproductive efficiency of Indonesian native cows. Records of reproductive efficiency, body size (hip height, body weight, body length, ...
This study was conducted in North Sulawesi, Indonesia to identify the factors affecting reproductive efficiency and to determine the contribution of each factor in reproductive efficiency of Indonesian native cows. Records of reproductive efficiency, body size (hip height, body weight, body length, heart girth) as well as age on one hundred and sixty seven Indonesian native cows (seventy six cows of the Bali breed and ninety one cows of the synthetic breed from unknown proportion of th Madura, the Sumba and the Ongole breeds) of 58 farmers were available in this research. The data were analyzed by covariance analysis using SAS package including reproductive efficiency as a dependent variable and breed, body size (hip height, body weight, body length, heart girth) and age of cows as independent variables. The contribution of each independent factor to dependent variable was estimated as the percentage of the sum of square in the corrected total sum of squares. The results showed that body weight and body size of cows would be considered as th most important factors affecting reproductive efficiency of Indonesian native cows. Therefore, the reproductive efficiency could be increased by 1) using cows that reached a target weight of at least 250 kg, 2) using cows with relatively well developed height at hip of at least 117 cm, heart girth of at least 150 cm, and body length of at least 125 cm, 3) keeping breeding cows that reach a target age of 24 months old with the maximum interval between postpartum and next breeding season of 90 days for each year, and 4) using good nutritional feeding to reach the optimum weight and body condition.
This study was conducted in North Sulawesi, Indonesia to identify the factors affecting reproductive efficiency and to determine the contribution of each factor in reproductive efficiency of Indonesian native cows. Records of reproductive efficiency, body size (hip height, body weight, body length, heart girth) as well as age on one hundred and sixty seven Indonesian native cows (seventy six cows of the Bali breed and ninety one cows of the synthetic breed from unknown proportion of th Madura, the Sumba and the Ongole breeds) of 58 farmers were available in this research. The data were analyzed by covariance analysis using SAS package including reproductive efficiency as a dependent variable and breed, body size (hip height, body weight, body length, heart girth) and age of cows as independent variables. The contribution of each independent factor to dependent variable was estimated as the percentage of the sum of square in the corrected total sum of squares. The results showed that body weight and body size of cows would be considered as th most important factors affecting reproductive efficiency of Indonesian native cows. Therefore, the reproductive efficiency could be increased by 1) using cows that reached a target weight of at least 250 kg, 2) using cows with relatively well developed height at hip of at least 117 cm, heart girth of at least 150 cm, and body length of at least 125 cm, 3) keeping breeding cows that reach a target age of 24 months old with the maximum interval between postpartum and next breeding season of 90 days for each year, and 4) using good nutritional feeding to reach the optimum weight and body condition.
* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.
문제 정의
The objective of this study was to identify the factors affecting reproductive efficiency and to determine the contribution of each factor in reproductive efficiency of Indonesian native cows.
대상 데이터
Cows used in this study were tied with limited length of tether (averse of 7.5 m) fbr grazing as the main management system practised by 58 farmers as the owners of the animals. Animals were tied by around the neck connecting to the nasal cavity.
Reproduction records of 167 Indonesian native cows of the farmers (58 owners) in Bolaang Mongondow regency, North Sulawesi, were used in this study. The cows were from two breed groups, 76 Bali breed and 91 Synthetic native breeds composed of unknown proportion of the Madura, the Sumba and the Ongole breed combinations, all were combined into a single group because it was impossible to delineate the exact breed composition.
성능/효과
In conclusion, the results of this study showed that body weight and body size of cows would be considered as the most important factors influencing the reproductive efficiency of Indonesian native cows. Therefore, these studies suggested that the reproductive efficiency of native cows could be increased by the following strategies: 1) Using cows that reached a target weight of at least 250 kg, 2) Using cows with relatively well developed height at hip of at least 117 cm, heart girth of at least 150 cm, and body length 125 cm, 3) Keeping breeding cows that reach a target age of 24 months old with the maximum interval between postpartum and next breeding season of 90 days for each year, and 4) Using good nutritional feeding to reach the optimum weight and body condition.
The factors considered in this model accounted for over 26% of the total variation in reproductive efficiency. In the model, body weight appeared to be the most important factor affecting reproductive efficiency explaining over 12 percent of the variation in reproductive efficiency.
The analysis of variance and percent change in the coefficient of determination (R2) fbr each of the factors were considered in the model associated with the reproductive efficiency (table 2). The factors considered in this model accounted for over 26% of the total variation in reproductive efficiency. In the model, body weight appeared to be the most important factor affecting reproductive efficiency explaining over 12 percent of the variation in reproductive efficiency.
The height at hip of cows in this study had a significant effect on reproductive efficiency for 5.41 percent of the variation in reproductive efficiency when ratios of cow body weight to body length and heart girth were excluded from the model (Model 2). Similarly, the body length of cows had a significant effect on reproductive efficiency fbr 6.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.