ENERGY AND PROTEIN REQUIREMENT BASED ON THE EFFICIENCY OF PROTEIN UTILIZATION OF SENTUL CHICKENS AND MANIFESTED IN THE PRODUCTION PERFORMANCE
Tuti Widjastuti, Rahmat Wiradimadja, Sjafril Darana
Sentul is a specific local chicken from Ciamis region in West Java with grey feathers as its distinctive feature, with a variation of grey and brown yellows feathers and orderly arranged feathers in its breast like dragon scales. Sentul was recognized as dual purpose local chicken breed and very potential, because rapid growth and high eggs productivity. They have adapted to environments and remain productive even if their diets are low of quality, resistant on diseases, and the pattern of maintenance does need a special skill. In order to increase the productivity of Sentul chickens, the improvement of breeding pattern and nutrient on diets should be done sufficiently for production. The improvement of diets is done by ratio composition that meets the nutrient rules for production and efficiency. To compose an efficient diet, firstly the requirement standard of metabolizable energy and protein as suitable to the breeding purpose must be known. The experiment was divided into two phases, the first phase to determine the efficiency of dietary protein utilization value (EUP) by means of excreta collection and to define the standard requirement of energy and protein during the production periods by using Scott et al method (1982). This experiment, used 60 day old chicks of Sentul chickens and was carried out in three months. The second phase, was aimed to evaluate the level of energy and protein diets during layer periods. The standard requirement of energy and protein diets 150 kcal/kg of metabolizable energy and 2 % of protein under and over the standard requirement was evaluated. A completely randomized design with five replications was used in this experiment. The parameters used are feed, energy and protein consumption, egg production, egg weight and feed conversion. The experiment used 75 pullet of Sentul chicken and was carried out for five months. The results of the first phase showed EUP is 57.24 ± 6.84%. Energy and protein requirement for laying phase 2979.275 Kcal/kg and 15.44% of protein. Based on second, it can be concluded that three performance of Sentul chicken laying phase increase when diets improved as energy standard requirement and protein as the basic of efficiency dietary protein utilization.
Key words: Efficiency utilization protein (EUP), layer phase, Sentul chicken, production performance