Growth performance of Vanaraja birds in high altitude areas of Arunachal Pradesh fed different dietary protein and energy levels

R.Buragohain, M.K.Ghosh, P.K.Pathak, F.A.Ahmed, and M.Bhattacharya
National Research Centre on Yak (ICAR)
Dirang, Arunachal Pradesh

Vanaraja, a dual-purpose bird, has adaptability and potentiality to provide economic benefit and uplifting the socio–economic condition of the rural poor. For optimizing the growth and productive performance, adequate levels of dietary protein and energy are the prime necessity. In the present study, an attempt has been made to study the effect of dietary protein and energy levels on growth performance of Vanaraja birds in high altitude areas of Arunachal Pradesh. About two hundred day-old chicks received from PDP, Hyderabad were distributed randomly into four groups with two replicates in each and housed under deep litter system of management in the experimental sheds of National Research Centre on Yak (ICAR), Dirang, Arunachal Pradesh situated at an altitude of about 5200 ft. above msl. Four experimental rations were prepared with decreasing levels of dietary protein i.e. 23 to 20% CP and increasing levels of energy i.e. 2800 to 3100 Kcal ME/kg, designated as Ration-I (23% CP, 2800 Kcal/kg), Ration-II (22% CP, 2900 Kcal ME/kg), Ration-III (21% CP, 3000 Kcal ME/kg) and Ration-IV (20% CP, 3100 Kcal ME/kg) respectively and fed up to 6 th weeks of age. The chicks were dewormed and vaccinated as per schedules. During the experimental period, daily feed intake, body weight gain at weekly interval and mortality of the chicks were recorded. The average daily feed consumption ranged from 57.40 +5.22 g to 65.56 +4.50 g per bird per day. No significant difference (P>0.05) was observed between the groups in daily feed intake, however, feed intake was inversely proportional to the dietary energy levels in the rations. The final body weight gain was observed to be highest with Ration–II with 22% CP and 2900 Kcal ME/kg (954.17 +26.44 g) followed by Ration I (945.83 +46.29 g), Ration III (905.38 +29.79 g) and Ration IV (882.31 +31.56g). However, no significant difference was observed between the groups in weekly body weight gain. Feed conversion ratio was recorded as, 1.31 +0.16, 1.32 +0.13, 1.25 +0.12, and 1.27 +0.13 with Ration I to IV. Thus, it is apparent from the present study that with increasing the energy levels in the diet, no significant difference was observed in respect of body weight gain or overall feed conversion ratio between the groups. However, considering the performance in terms of body weight gain or overall feed conversion efficiency, 22% CP and 2900 Kcal ME/kg may be considered as optimum for growth performance of Vanaraja birds up to 6 th weeks of age in high altitude areas of Arunachal Pradesh. Further studies with more nos. of birds for longer duration are necessary to get absolute requirements of protein and energy in high altitude areas for optimum productivity of Vanaraja birds.

Source : IPSACON-2005

Did You Like This Article? Bookmark it at Del.icio.us

Article Tools