Prediction on the number of dairy cattle in the project population in Kucha prefecture, Xinjiang Uighur, China using simulation technique
2003
Terawaki, Y. (Rakuno Gakuen Univ., Ebetsu, Hokkaido (Japan)) | Wusiman, A. | Mutielifu, P. | Aishan, A. | Dochi, O.
A breeding program has been established for the dairy cattle population in Kucha prefecture, Xinjiang Uighur, China. This program has intended to increase the number of cattle in the project population using superovulation and embryo transfer. The number of dairy cattle in the project population was predicted by simulation techniques. Length of herd life for males, number of calving, age at first calving, and litter size were examined as factors influencing the number of cattle in the project population. Age at first calving and litter size remarkably influenced the number of cattle. It was noticeable that litter size had a very strong influence on the number of cattle in the scheme in which heifers have their first calves at 2 years old. The largest number of dairy cattle in the project population was predicted in the scheme in which males had a 5-year herd life, heifers calved 5 times with the first calving at 2 years old, and 12 calves of litter size. It may be necessary to carry out a program in which many technicians are trained and to effectively use artificial insemination.
Afficher plus [+] Moins [-]Mots clés AGROVOC
Informations bibliographiques
Cette notice bibliographique a été fournie par Agriculture, Forestry and Fisheries Research Information Technology Center
Découvrez la collection de ce fournisseur de données dans AGRIS