The influence of dietary protein and energy levels on the performance, meat bone ratio and meat chemical composition of SenSi-1 Agrinak chicken

Abstract

<p class="Default"><span lang="EN-US">Sensi-1 Agrinak is a strain of the improved native chickens for meat production in Indonesia. The objective of </span><span lang="IN">this</span><span lang="EN-US"> study  was to investigate influence of different dietary energy and protein levels on </span><span lang="IN">p</span><span lang="EN-US">erformance, meat bone ratio</span><span lang="IN">,</span><span lang="EN-US"> and meat chemical composition of Sensi-1 Agrinak chicken, reared until 10 weeks of age. Two hundred and sixteen of unsexed day old chickens (DOC) of  Sensi-1 Agrinak were subjected to six experimental rations differed in dietary crude protein (CP) content,. </span><span lang="IN">Namely:</span><span lang="EN-US"> 21;19; and 17 % and dietary  metabolizable  energy (ME) (2800 and 3000 kcal/kg). Each treatment combination was replicated  four times and fed from day old to 10 weeks old. In each treatment combination there were nine unsexed-DOCs. The parameters observed were performance (i.e. live weight, feed intake, viability, FCR), economic index (European Production Efficiency Factor/EPEF), meat bone ratio, and meat chemical composition.  </span><span lang="IN">R</span><span lang="EN-US">esult showed that  </span><span lang="EN-US">increas</span><span lang="IN">ed</span><span lang="EN-US"> of dietary CP level increased live weight and EPEF (p&lt;0.05). Sensi-1 Agrinak chicken had the best FCR (2.59), when fed  diet containing 21% CP and 3000 kcal/kg. Increas</span><span lang="IN">ed</span><span lang="EN-US"> dietary CP level increased the  meat-bone ratio of breast, thighs, and drumsticks. Meanwhile, increas</span><span lang="IN">ed</span><span lang="EN-US"> levels of dietary CP and ME did not affect (p&gt;0.05) meat chemical composition. It </span><span lang="IN">is</span><span lang="EN-US"> concluded that optimal dietary levels of crude protein and energy for unsexed Sensi-1 Agrinak chicken  up to 10 weeks of age were 21% CP and 3000 kcal/kg.</span></p>