›› 2018, Vol. 45 ›› Issue (8): 2157-2166.doi: 10.16431/j.cnki.1671-7236.2018.08.014

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Study on Metabolizable Energy, Crude Protein, Ca and Available P Contents in Black Muscovy Ducks Aged from 22 to 42 Days

ZHANG Ling1, SUN Guobo1, DUAN Xiujun1, GU Wenjie1, WANG Jian1, QIN Haorong2, GE Yuzhu1, ZHANG Kai3   

  1. 1. Jiangsu Agri-animal Husbandry Vocational College, Taizhou 225300, China;
    2. National Gene Bank of Waterfowl Resources, Taizhou 225300, China;
    3. Animal Husbandry and Veterinary Service Station of Zhengyu, Nantong 226153, China
  • Received:2017-12-26 Online:2018-08-20 Published:2018-08-15

Abstract:

In order to obtain the adequate contents of metabolic energy,crude protein,calcium and available phosphorus in diet of Black Muscovy duck aged from 22 to 42 days,288 22-day-old healthy Black Muscovy ducks were chosen and separated to 9 groups, with 4 repeats per group and 8 ducks per repeat,and L9 (34) design was selected to engage in orthogonal experiment of four factors at three levels.The ducks were fed 9 experimental diets of B1 to B9 with different levels of ME (11.92,12.32,12.72 MJ/kg),CP(16%,18%,20%),Ca(0.6%,0.8%,1.0%) and available P (0.30%,0.45%,0.60%).The growth performance,slaughter performance and serum biochemical indexes of the ducks were detected by feeding and slaughter test.The result showed that the nutritional advantages of B3 group were more obvious in weight gain and slaughter performance, the average final weight, average daily gain and F/G of B3 group were 1 556.64 g,46.43 g/d and 2.39,respectively,of which the average final weight was significantly higher than that of B1 and B9 groups (P<0.05).The slaughter rate,semi-eviscerated rate,eviscerated rate and leg muscle rate of ducks in B3 group were 73.43%,64.81%, 55.26% and 26.56%,respectively, showing a good growth and development trend.The result of body size measurements and serum biochemical indexes indicated the nutrition level and feed formula of B3 group was the best.Therefore,the recommend nutrient levels of diet for 22 to 42 days old Black Muscovy duck were metabolic energy 11.92 MJ/kg,crude protein 19.25%,calcium 1.03% and effective phosphorus 0.60% under the presented experiment condition.

Key words: Black Muscovy ducks; metabolic energy; crude protein; Ca; available P

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