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Effects of a multi-enzyme complex on growth performance,nutrient utilization and bone mineralization of meat duck

Journal of Animal Science and Biotechnology 2015年第4期6卷 402-409页

作者： Qiufeng Zeng Xueqin Huang Yuheng Luo Xuemei Ding Shiping Bai Jianping Wang Yue Xuan Zhuowei Su Yonggang Liu Keying Zhang Institute of Animal Nutrition Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of EducationSichuan Agricultural University Adisseo Asia Pacific Pte Ltd

Background： Previous studies with broiler have shown dietary supplementation with multi-enzyme complex containing non-starch polysaccharides （NSP） degrading enzymes and phytase is efficient in releasing phosphorus （P）, calcium （Ca）, energy and amino acids from corn-soybean meal diets or corn-sorghum diets, hence compensating considerable levels of nutrients in formulation. Notwithstanding, such potentials have not been well defined in duck nutrition. Giving China being the largest duck producing country, we conducted this study to establish adequate specifications of major nutrients along with multi-enzyme complex to meat duck from day-old to slaughter, focusing on performance, utilization of nutrients and bone mineralization. Five dietary treatments were： Positive control （PC,T1）： the nutrients concentration of diet for 1 to 14 d of age were apparent metabolizable energy（AME） 2,800 kcal/kg, crude protein （CP）1 9.39%, Ca 0.85%, available phosphorus （avP） 0.42%; for 15 to 35 d of age these parameters were AME 2,900 kcal/kg, CP 16.47%,Ca 0.76%,avP 0.38%; Negative control 1（NC1,7-2）, the AME and digestible amino acids （DAA） were reduced by 70 kcal/kg and 2.0%, avP and Ca by 1.0 g/kg from PC diet; Negative control 2（NC2,T4）, the down- spec from PC diet was AME 100 kcal/kg, DAA 2.5%, avP 1.5 g/kg and Ca 1.2 g/kg; The enzyme complex was added at the same dosage （200 mL/1,000 kg） on NC1 （T3） and NC2 （T5） diets. Results： Comparing with the ducks fed on T1, T3 and T5 diets, the birds fed on NC2 diet showed the lowest （P 〈 0.05） body weight （ d 14 and 35）, feed intake （d 35）, tibia ash, Ca and P contents （d 14 and 35）, and the utilization of nutrients （P 〈 0.05）. The supplementation with the enzyme complex to the NC diets restored growth rate, utilization of nutrients and bone mineralization to the level of the PC diet, and increased AME by 60 kcal/kg and 117 kcal/kg, respectively for the NC1 and NC2 diets. Conclusion： These results suggest that down-spec AME by 100 kcal/kg,

关键词： Formulation specification Growth Phytase meat duck Non-starch polysaccharides enzyme

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Calcium supplementation in low nutrient density diet for meat ducksimproves breast meat tenderness associated with myocyte apoptosisand proteolytic changes

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Animal Nutrition 2022年第2期9卷 49-59页

作者： Huaiyong Zhang Quifeng Zeng Shiping Bai Jianping Wang Xuemei Ding Yue Xuan Zhuowei Su Joris Michiels Keying Zhang Institute of Animal Nutrition Key Laboratory for Animal Disease-Resistance Nutrition of Chin1Ministry of EducationSichuan Agricultural UniversityChengdu611130China College of Animal Science and Technology Henan Agricultural UniversityZhengzhou450002China Laboratory for Animal Nutrition and Animal Product Quality Department of Animal Sciences and Aquatic EcologyGhent UniversityGhent9000Belgium

To define the relationship between dietary nutrient density, calcium (Ca), and meat quality in meatducks. A total of 288 male Cherry Valley SM3 medium ducklings were fed a common standard starter dietuntil d 14. At 15 d of age, ducks were randomly divided into 2 treatment groups and fed either a conventionaldiet or a low nutrient density (LND) diet. Compared with the conventional diet, the energy wasreduced in the LND diet by 8.6% and 16.8% in grower (15 to 35 d) and finisher (36 to 56 d) phases,respectively, while other essential nutrients were kept proportionate to energy. The LND diet decreasedthe shear force (P meat quality. Subsequently,the effects of grated Ca in the LND diet on meat quality of pectoralis muscle were evaluated. A total of 576male ducklings were fed a common starter diet until d 14, followed by feeding 4 LND diets with 0.5%,0.7%, 0.9%, and 1.1% Ca. The results show that LND diets with 0.7% or more Ca decreased the shear force ofpectoralis major muscle in 42-d-old meat ducks (P meat,particularly the enhancing effect of 1.1% Ca LND diet on tenderness seems to be associated with proteolyticchanges of myofibrillar proteins and myocyte apoptosis in meat ducks.

关键词： Nutrient density Ca Tenderness meat duck

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Dietary supplementation of 25-hydroxycholecalciferol increases tibial mass by suppression bone resorption in meat ducks

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Animal Nutrition 2020年第4期6卷 467-479页

作者： Huaiyong Zhang Qiufeng Zeng Shiping Bai Jianping Wang Xuemei Ding Yue Xuan Zhuowei Su Gergory S.Fraley Bing Yao Keying Zhang Institute of Animal Nutrition Key Laboratory for Animal Disease-Resistance Nutrition of ChinaMinistry of EducationSichuan Agricultural UniversityChengduSichuan611130China Biology Department Hope CollegeHolland49423USA DSM(China)Ltd. PuDong New AreaShanghai201203China

Leg problems often result from the rapid weight gain and poor bone quality in modern ducks,leading to a high risk of fractures and continuous *** hypothesized that improving bone quality in combination with delaying weight gain via a low nutrient density(LND)diet probably reverses these skeletal *** indicated that 25-hydroxycholecalciferol(25-OH-D3),a vitamin D3 metabolite,is effective in treating bone-related ***,Exp.1 evaluated the effects of 25-OH-D3 on tibial mass of meat *** meat ducklings were fed a standard nutrient density diet(containing a regular vitamin regimen)without or with 25-OH-D3 at 0.069 mg/kg for 35 *** results showed that 25-OH-D3 supplementation improved the mineral content,microarchitecture and mechanical properties of tibias,and this companied by a decreased serum bone resorption marker and a concomitant decrement in osteoclast-specific marker genes ***,Exp.2 was conducted to examine the impacts of 25-OH-D3 incorporating an LND diet on tibial quality of ducks under 2 different vitamin regimens(regular and high).ducklings were allocated to a 2*2 factorial arrangement with 2 kinds of vitamin premixes and without or with 25-OH-D3 at 0.069 mg/kg in LND *** high premix had higher levels of all vitamins except biotin than the regular *** results demonstrated that high vitamin diets exhibited more significant effects than regular vitamin diets on inhibiting bone turnover and increasing minerals *** mineral content,microarchitecture,and strength of birds under the regular vitamin regimen were increased by 25-OH-D3 supplementation;However,these positive effects were not observed in ducks under the high vitamin *** conclude,25-OH-D3 supplementation improves tibial mass by suppressing osteoclast-mediated bone resorption in meat ducks,and this positive impact only was observed in regular but not high vitamin regimen when birds fed an LND diet.

关键词： Vitamin D_(3)metabolites Vitamin Bone turnover Tibial mass meat duck

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Effects of dietary nanocrystalline cellulose supplementation on growth performance,carcass traits,intestinal development and lipid metabolism of meat ducks

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Animal Nutrition 2016年第3期2卷 192-197页

作者： Haoyue Han Keying Zhang Xuemei Ding Shiping Bai Yueheng Luo Jianping Wang Huanwei Peng Qiufeng Zeng Institute of Animal Nutrition Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education Sichuan Agricultural University

The influence of nanocrystalline cellulose(NCC) supplementation on growth performance, carcass traits,intestinal development, and lipid metabolism was assessed in 600 one-day-old male meat ducks(Cherry Valley ducks) from 1 to 35 d of age. Diets were supplemented with 0,200,500,800 and 1,500 mg/kg NCC during both the starter(1-14 d) and grower(15-35 d) phases. Each dietary treatment consisted of 8 replicate cages of 15 birds. Supplementation of NCC was associated with dose dependent increases in BW gain and feed intake(P meat weight(P ducks at 35 d of *** of NCC resulted in a dose-dependent increase in the weight(P duck performance, intestinal development and lipid deposition.

关键词： Carcass traits Growth performance Lipid metabolism meat duck Nanocrystalline cellulose

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