Studies On Energy And Protein Requirements For1～7Weeks Black Male Muscovy Ducks

Experiments were conducted to investigate the effect of different dietary metabolic energy (ME) and crude protein (CP) levels on growth performance and blood parameters in1-3weeks and4-7weeks black male Muscovy ducks by rearing, metabolism and compare slaughter experiments.It also could conductede the ME and CP the requiremet of them in diet.Experiment1Effect of different energy and protein levels on growth performance in1-7weeks the black male Muscovy ducksA3X3factorial experiment was conducted to investigate the effect of different ME and CP levels on growth performancein in1-7weeks black male Muscovy ducks. The experiments consisted of two phases:1～3weeks and4-7weeks. In the first phase:3781-day-old black male Muscovy ducks which average body weight was50gram were selected, and randomly allocated to9groups with6replicates of7ducks. The ducks were feed with11.72,12.14or12.55MJ of ME per kg of diet and17.0%,19.0%or21.0%CP. In the second phase:32421-day-old black male Muscovy ducks which average body weight was610gram were selected, and randomly allocated to9groups with6replicates of6ducks. The ducks were feed with11.30,11.72or12.14MJ of ME per kg of diet and15.0%,17.0%or19.0%CP.The result of the test of the1-3weeks black male Muscovy ducks showed: dietary CP level had significant or very significant effect on average daily gain (ADG), availability of dry matter, energy and CP (P<0.05or P<0.01); Dietary ME level had significant or very significant effect on average daily feed intake (ADFI) and feed/gain (F/G)(P<0.05or P<0.01); The CP and ME interaction (the interaction) had significant effect on3weeks body weight (BW), ADG, availability of dry matter and energy (P<0.05).The result of the test of the4-7weeks black male Muscovy ducks showed: dietary CP level had very significant effect on availability of dry matter and CP (P<.05or P<0.01); Dietary ME level had significant or very significant effect on ADFI, F/G, availability of dry matter and energy (P<0.05or P<0.01);The interaction had significant or very significant effect on availability of dry matter, energy and CP (P<0.05).In concluded, the dietary optimum ME and CP level of black male Muscovy duck (1～3weeks) were12.55MJ/kg and17%respectively while those of black male Muscovy duck (4～7weeks) were11.72MJ/kg and15.0%.Experiment2Study on energy and protein requirements of1～7weeks black male Muscovy ducksThis experiments were conducted to investigate the effect of different ME and CP levels on body composition, ME and CP deposition, ME and CP requirement. At1-day-age and21-day-age,6birds were slaughtered as the contrast. And at21-day-age and49-day-age,27birds, selected from9groups in rearing test according to the BW, were also slaughtered to compare the contrast.The result of the test of the1～3weeks black male Muscovy duck showed: dietary CP level had very significant effect on CP intake and deposition rate of CP (P<0.01);The interaction had significant effect on living body energy content (P<0.05).The result of the test of the4～7weeks black male Muscovy duck showed: dietary CP level had very significant effect on CP intake and deposition rate of CP (P<0.01);Dietary ME level had significant effect on living body CP content and intake CP (P<0.01);The interaction had significant effect on living body water and energy content, deposition rate of ME (P<0.05).In concluded, the ME and CP requirement formulas for1～3weeks black male Muscovy duck were ME=756.68W0.75+7.13ΔW and CP=33.36W0.75-0.46ΔW respectively while those of4～7weeks black male Muscovy duck were ME=1285.39W0.75-4.2ΔW and CP=0.81ΔW-8.92W0.75.ME and CP requirements for1～3weeks black male Muscovy duck were12.10MJ/kg and19.31%respectively while those of4～7weeks black male Muscovy duck were11.71MJ/kg and17.64%.