Effectof Different Dietary Crude Protein Levels on Performance and Reproductiveof Japanese Quails)Coturnix .Coturnix)

Abstract

This study was carried out at the Animal Production Research Centre at Kuku, Khartoum State, Sudan, during (December 2017 -January 2018).This study was conducted todetermineeffectofdifferent dietary crude protein levelson performance, reproductively and dressing percentage of Japanese quailsunder Sudan conditions. One hundred and eighty dayoneoldquail chicks were individually weighted and distributed by using complete randomized design into four groups having 45 birds in each. Each group was further subdivided into three replicates having 15 birds in each. Four different experimental rations of GNC based were included formulated with four levels of protein (22, 24, 26 and 28%) and energy level of (2900Kcal ME\Kg ) while control group contains( 24% with 2900Kcal ME\Kg) according to the requirements of National Research Council NRC(1994). Data from this study were subjected to one way ANOVA followed by least significant difference(LSD)to test the differences among the groups. The Results showed that feed intake (FI) was highly significantly(p<.01) increase whenthe protein level in the diet decrease, feed conversion ratio (FCR) was significantly(p<.01)improvedwhen the protein level in the diet increase. The protein efficiency ratio (PER)and energy efficiency ratio (EER) weresignificantly(p<.01) improvedwhen the protein levels in the diet increase,dressing percentage was significantly(p<.05) increase when the protein level in the diet increase. live body weight (BW)and body weight gain (WG) they were no significanteffects of dietary protein levelwhile we observedsignificantly(p<.05) increased of above mentional parameters when the quail chickswere at early age. Also The Results showed that age at first egg (AFE) was significantly(p<.01)improvedwhen the protein level in the diet increase.Therewas no significanteffect of dietary protein levelson mortality,body weight at first egg and weight of first egg. It could be concluded that dietary level of 28% crude protein in the diet recommended for growth performances of Japanese quail because it has beneficial effect on growth .