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- Title
Appropriate Metabolic Energy, Crude Protein, Calcium and Available Phosphorus Levels of Diet for Black Muscovy Duck at 43-91 Days of Age.
- Authors
Zhang Ling; Gu Wenjie; Zhang Kai; Duan Xiujun; Qin Haorong; Bian Youqing
- Abstract
[Objective] The paper was to study the effects of diet formulation with different nutrition levels on growth and slaughter performance of black muscovy duck at the age of 43-91 days. [Method] Totally 288 individuals of 43-day-old black muscovy duck were randomly divided into nine treatments, four repeats each treatment and eight ducks each repeat. Using L9 (34) orthogonal experiment design (four factors and three levels), three metabolic energy levels (12.32, 12.72, 13.12 MJ/kg), three crude protein levels (14%, 16%, 18%), three calcium levels (0.6%, 0.8%, 1.0%) and three available phosphorus levels (0.30%, 0.45%, 0.6%) were designed, and a total of nine feeding groups (C1-C9) were designed according to different nutritional levels. Through combination of feeding test (49 d) and metabolic test (pre-test 4 d and formal test 3 d), the growth performance, meat performance and apparent nutrient digestibility of ducks were determined. [Result] The ducks in experimental group C2 had the highest average daily gain, the lowest feed gain ratio, the largest body oblique length, chest width, chest depth and tibia length, which had significant or extremely significant differences with other groups (P<0.05 or PcO.Ol). The slaughter rate, semi-eviscerated rate, eviscerated rate and meat quality of ducks in C2 group were higher (P<0.05). The apparent digestibility of crude protein and dietary metabolic energy in C2 group were 88.68% and 63.07%, respectively, both were significantly or extremely significantly higher than the other groups (P<0.05 or P<0.01), while the interaction effect of calcium and phosphorus level on apparent digestibility was not obvious. [Conclusion] Under the experimental conditions, the suitable metabolic energy, crude protein, calcium, available phosphorus and total phosphorus levels of 43-91 days old black muscovy ducks were 12.32 MJ/kg, 16.10%, 0.92%, 0.45% and 0.68%, respectively.
- Subjects
DUCK age; DUCK food; DUCK behavior; DUCKS; DUCK populations; REPRODUCTION
- Publication
Animal Husbandry & Feed Science, 2018, Vol 10, Issue 4, p257
- ISSN
1943-9911
- Publication type
Article
- DOI
10.19578/j.cnki.ahfs.2018.04.010