Effects of the different levels of dietary trace elements from organic or inorganic sources on growth performance, carcass traits, meat quality, and faecal mineral excretion of broilers

Autor:	Wu Yueming, Sha An, Hu Shengdi, Aoran Zhang, Zhengpeng Zhu, Changsong Gu, Zhao Min, Zunzhou Lv, Wang Zhengguo, Yan Lei, Yutao Zhu
Rok vydání:	2019
Předmět:	Male Meat Iron Breast muscle Excretion Feces Random Allocation Animal science Intestinal Elimination Animals Carcass composition Manganese Minerals Dose-Response Relationship Drug General Veterinary Chemistry Trace element General Medicine Animal Feed Diet Trace Elements Zinc Dietary Supplements Animal Nutritional Physiological Phenomena Animal Science and Zoology Chickens Copper
Zdroj:	Archives of Animal Nutrition. 73:324-337
ISSN:	1477-2817 1745-039X
DOI:	10.1080/1745039x.2019.1620050
Popis:	This experiment was conducted to evaluate the effects of different sources and levels of trace elements on growth performance, carcass composition and mineral excretion levels of broilers. In a completely randomised experimental design, 900 one-day-old male Ross-308 broilers were assigned to 5 treatments, with 6 replicates of 30 birds each. The control group (CITE) was fed with a basal diet containing regular inclusion levels of inorganic trace elements. Treatment groups were supplied with reduced levels (30% and 50% of the regular level) of inorganic (ITE) or organic trace elements (OTE), respectively. Groups 50% ITE, 30% OTE and 50% OTE diets had equivalent average daily gain (ADG), average daily feed intake (ADFI), feed to gain ratio (F/G ratio) and mortality rate compared with group CITE in any phase. However, compared with group CITE chicks in group 30% ITE have lower ADG and ADFI and higher F/G ratio. The carcass yields were not affected by dietary treatments. Compared with group CITE, in groups 30% ITE, 50% ITE, 30% OTE and 50% OTE the shear force values of the breast muscle were only 71.8%, 83.4%, 63.5% and 59.4% (p < 0.05), respectively. Birds received diets containing reduced levels of trace elements had diminished excretions of Mn and Zn throughout the entire period (p < 0.01). In conclusion, the reduced supplementation of trace elements had no or slightly negative impact on growth performance, carcass yield and meat quality, but decreased faecal mineral excretion. Moreover, the trace element supply as OTE played a limited role on performance and excretion and was only partly beneficial for animal performance in case the trace element supply was reduced to 30%.
Databáze:	OpenAIRE
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