Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios
Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios
1PHENOTYPIC CHARACTERISTICS AND MEAT PRODUCTION PERFORMANCES OF DONG TAO CHICKENS IN RATIONS WITH DIFFERENT METABOLIZABLE ENERGY TO CRUDE PROTEIN RATI Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios IOSBUI NGOC SONA DissertationPresented to the Faculty of the Graduate Studies and Applied Research College of AgricultureLAGUNA STATE POLYTECHNIC UNIVERSITY Siniloan (Host) CampusSiniloan, LagunaIn Partial Fulfillmentof the Requirements for the Degree Doctor of Philosophy in Agriculture Major in Ani Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios mal Science20192Chapter 1THE PROBLEM AND ITS BACKGROUNDIntroductionThe poultry population will increase from 7324.8 billion in 2015 to 7716.7 billionPhenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios
in 2020 and 8424.9 billion in 2030. Along with this development, the poultry meat consumption in the developed countries is expected to increase by 5.1PHENOTYPIC CHARACTERISTICS AND MEAT PRODUCTION PERFORMANCES OF DONG TAO CHICKENS IN RATIONS WITH DIFFERENT METABOLIZABLE ENERGY TO CRUDE PROTEIN RATI Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios ons (The Poultry Site, 2016).Vietnam is an agricultural country with 70% population living in rural area. More than 80% of the total agricultural households keep chickens (Vang. 2003; Burgos, 2008). In 2017, according to Agriculture Statistical Report, the chicken population in Vietnam was estimated Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios at about 295.20 million heads. The distribution ranges from 2.9 million in the Northwest to 40.6 million birds in the Red River Delta (TKCN. 2017). LPhenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios
ocal chickens make up more than 70% of the country's total chicken population (Desvaux, 2008). They are mainly kept in the traditional extensive backy1PHENOTYPIC CHARACTERISTICS AND MEAT PRODUCTION PERFORMANCES OF DONG TAO CHICKENS IN RATIONS WITH DIFFERENT METABOLIZABLE ENERGY TO CRUDE PROTEIN RATI Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios after pork (Burgos et al., 2008) and plays an integral role in the smallholder farming systems. They are used to meet the multiple social, economic and cultural needs of households (Epprecht. 2005; Burgos. 2008). Vietnamese native chicken breeds are specific for particular regions and they are assu Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios med to shows specific3adaptation to climate, diseases are to local low input and low output production system. The native chicken breeds have low perfPhenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios
ormance but they are predominant in number and are being kept in extensive scavenging systems. It is estimated that there are 12 local breeds and they1PHENOTYPIC CHARACTERISTICS AND MEAT PRODUCTION PERFORMANCES OF DONG TAO CHICKENS IN RATIONS WITH DIFFERENT METABOLIZABLE ENERGY TO CRUDE PROTEIN RATI Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios h are being raised in the North and the Ta Vang (or Tau Vang) in the South. These local breeds are of low productivity in comparison to foreign imported breeds but have characteristic yellow-orange feathering and dark skin color features that are favored by consumers in both rural and urban areas, p Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios articularly for traditional festivals, family gifts, marriages and for religious offerings (Hong Hanh et al., 2007).A rare Vietnamese chicken breed caPhenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios
lled the Dong Tao, prized for its delicious meat, has one of the thickest legs usually not seen among birds of that size. This chicken breed is endemi1PHENOTYPIC CHARACTERISTICS AND MEAT PRODUCTION PERFORMANCES OF DONG TAO CHICKENS IN RATIONS WITH DIFFERENT METABOLIZABLE ENERGY TO CRUDE PROTEIN RATI Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios thy body and stout legs covered with reddish scales. A newly-hatched chick takes eight months to one year to become a marketable bird of three to five kilograms. A male adult Dong Tao chicken can weigh up to 6 kilograms and develop legs as thick as a human s wrist. The hens are generally white, whil Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios e the cocks have colorful feather (Kaushik, 2015). An adult Dong Tao chicken can grow up to weigh three to six kilograms, with legs as thick as a humaPhenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios
n’s wrist. The hens are generally w-hite, while the cocks4have colorful feathers. Dong Tao meat is considered far more delicious than regular chickens1PHENOTYPIC CHARACTERISTICS AND MEAT PRODUCTION PERFORMANCES OF DONG TAO CHICKENS IN RATIONS WITH DIFFERENT METABOLIZABLE ENERGY TO CRUDE PROTEIN RATI Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios ra, 2015).Background of the studyLike pig breeds, native chicken breeds are mainly kept in small households in rural and remote areas and are based on scavenging or foraging and they play a very important role in the livelihood of farmers by providing daily protein from eggs and meat and as a commod Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios ity in exchanging goods.Poultry keeping is an integral part of rural households' livelihood strategies and has been so for thousands of years. PoultryPhenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios
meat and eggs are major sources of animal protein for the poor (Bugos, 2007).In 2007. it was estimated that there were about 820 heads of Dong Tao ch1PHENOTYPIC CHARACTERISTICS AND MEAT PRODUCTION PERFORMANCES OF DONG TAO CHICKENS IN RATIONS WITH DIFFERENT METABOLIZABLE ENERGY TO CRUDE PROTEIN RATI Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios owish or light brown feathers on the hens and dark plum color, black tails or dark green on the cocks. The specific characteristics of Dong Tao chicken are the body big and firm, big legs and rough yellowish-red scales, pale yellow toes, light yellow scales when it is matured (VUSTA, 2010).Apart fro Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios m supplying meat and eggs, the local breeds also take part in cultural and social activities in Vietnam. For example. Ho and Choi (fighting) chicken aPhenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios
re being used for entertainment in religious celebrations. Ac and Tre chicken are used for medical purposes. Tre chickens are raised as pet birds and51PHENOTYPIC CHARACTERISTICS AND MEAT PRODUCTION PERFORMANCES OF DONG TAO CHICKENS IN RATIONS WITH DIFFERENT METABOLIZABLE ENERGY TO CRUDE PROTEIN RATI Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios a income when necessary (Vang, 2003).Dong Tao chickens were relatively high in carcass yield with average is 66.76%. The average feed intake and feed conversion ratio (FCR) were 105 g/day/head and 4.6kg of feed per one kilo of live weight, respectively (Tham, 2016).Similar to broilers, ingredients s Phenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios upplying dietary energy and protein represent most of the diet cost for native chicken. Therefore, providing diets formulated to contain metabolizablePhenotypic characteristics and meat production performan of dong tao chicken in rations with different metabolizable energy to crude protein ratios
energy and protein at optimum concentrations to native chicken may increase profits by decreasing feed cost and/or increasing meat yield.Le Thi Tham 1PHENOTYPIC CHARACTERISTICS AND MEAT PRODUCTION PERFORMANCES OF DONG TAO CHICKENS IN RATIONS WITH DIFFERENT METABOLIZABLE ENERGY TO CRUDE PROTEIN RATI1PHENOTYPIC CHARACTERISTICS AND MEAT PRODUCTION PERFORMANCES OF DONG TAO CHICKENS IN RATIONS WITH DIFFERENT METABOLIZABLE ENERGY TO CRUDE PROTEIN RATIGọi ngay
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