STUDY ON THE INFLUENCE OF THE ENERGY LEVEL IN DIETS FOR CAY CUM CHICKEN IN THAI NGUYEN PROVINCE

Abstract

The study was carried out on Cay Cum chickens for meat type in Thai Nguyen province. 900 chickens were randomly divided in to 3 treatments (Treatment 1, 2 and 3), 100 chickens/1 lot, with 3 replicates/ treatment.

Three metabolism energy level for 3 treatment in three periods of growing chicken as following: 0-4 weeks (ME 3000, 2950 and 2900 kcal/kg with 18% CP); from 5-8 weeks (ME 3050, 3000 and 2950 kcal/kg with 17% CP) and from 9-20 weeks (ME 3100, 3050 and 3000 kcal/kg with 16% CP). The results showed that survival rate of Cay Cum chicken in 3 treatments were high, range from 95.0 to 96.7%, buts no significant difference between 3 treatments were found. The growth performance of the experimental chickens was following normal growth rate of other chickens from 0 to 8^th week, and there were no significant difference between 3 treatments (P>0.05). Up to 20 weeks, there were significant differences in the body weight gain of chickens in treatment 3 compare to treatment 1 (P<0.05), however no significant difference (P>0.05) was found between treatment 1 and 2. Feed consumption of three treatments were increased from 12 to 20 weeks (average feed consumed from 4.52 - 4.71 kg), and significant difference (P<0.05) between treatment 1 and 3 was founded. The final result showed that using diets with metabolism energy level in three stages 0-4; 5-8; and 9-20 weeks old are 2950 kcal, 3000 kcal and 3050 kcal, respectively (Treatment 2) gave higher grow rate, body weight gain and feed conversion ratio to meat type Cay Cum chickens.