According to an FAO report, 60 of the 1729 breeds identified worldwide are extinct, 154 are critically endangered, 214 are endangered and 1089 have an unknown conservation status.
However, in the long term, this intensive poultry farming, using only high-yielding hybrid lines, is a serious threat to the genetic diversity of poultry breeds in the world because of the replacement of local breeds by these productive exotic breeds. Intensive poultry farming provides protein to the human population at a very large scale, especially in growing urban areas. Nowadays, because of improvements in the intensive farming systems, the poultry production has developed rapidly worldwide. At the local scale, indigenous chicken populations have a significant contribution to household production, especially for low income farmers in Asia, Africa and the South Pacific. Moreover, their short production cycle is another important advantage, making them a major source of animal protein for humans and providing diverse products for human consumption. Chickens can adapt easily to various environmental conditions due to their small size, reduced needs and ability to find feed and water for themselves. Since then, humans have depended a lot on it. The study demonstrates the need to find ways to improve the production and reproduction performances of these animals, in order to contribute to the program of conservation and exploitation of these two breeds.ĭomestication of poultry started about 8000 years ago. In summary, the production performances of Ho and Dong Tao chickens were low, even when birds were fed a commercial diet. The eggs production and number of embryonated eggs were low for the two breeds when compared to other breeds, with a lower hatching performance in Ho than in Dong Tao. Yield, carcass composition and meat quality differed between the two studied breeds. Slaughter age proved to affect several carcass yield characteristics, showing that slaughtering between 16 and 20 weeks might be better than at the usual age of 28 weeks. Feed conversion ratios were also similar, and demonstrated the low efficiency of these two breeds when compared to commercial broilers. The growth patterns were similar for the two breeds. We investigated egg laying and egg quality using 36 Ho and 32 Dong Tao hens during 52 weeks of laying.
In a survey, we continuously recorded for 28 weeks, the data on the production performance and meat quality of 250 chicks from each breed. The objective of this work was the evaluation of the meat production and laying performances, and the meat and egg quality of two breeds of Vietnamese broiler chickens, Ho and Dong Tao, fed on a commercial diet.
0 kommentar(er)
