Evaluation of zinc-bearing palygorskite effects on growth performance, nutrient retention, meat quality, and zinc accumulation in blunt snout bream Megalobrama amblycephala

• Published in: Clays and clay minerals 2018-06, Vol.66 (3), p.274-285
• Main Authors: Zhang Ruiqiang, Zhang Ruiqiang, Zhou Yanmin, Zhou Yanmin, Jiang Xueying, Jiang Xueying, Chen Yueping, Chen Yueping, Wen Chao, Wen Chao, Liu Wenbin, Liu Wenbin, Jiang Ying, Jiang Ying
• Format: Article
• Language: English
• Subjects: Accumulation; Antioxidants; Biogeosciences; Blunt Snout Bream; Body composition; Bream; Capacity; chemical properties; Chordata; Clay; clay mineralogy; Clay minerals; Cooking; Copper; Diet; Earth and Environmental Science; Earth Sciences; effects; Environmental geology; Evaluation; experimental studies; Feed additives; Fish; Gene expression; Geochemistry; Growth; Growth Performance; Heavy metals; Intestine; Intestines; Ion exchange; Livestock; living taxa; Meat; Meat Quality; Medicinal Chemistry; Megalobrama amblycephala; Megelobrama; Megelobrama amblycephala; metals; Mineral nutrients; Mineralogy; Muscles; Nanoscale Science and Technology; Nutrient concentrations; Nutrient content; Nutrient retention; nutrients; Palygorskite; Pathogens; Protein transport; Proteins; Retention; rock, sediment, soil; sheet silicates; Silicates; Soil Science & Conservation; Sulfates; Superoxide dismutase; Tissue; Trace elements; Transcription; Vertebrata; Zinc; ZINC-BEARING PALYGORSKITE
• ISSN: 0009-8604; 1552-8367
• DOI: 10.1346/CCMN.2018.064100

Zinc (Zn) is widely known as an essential trace element for fish and new ways to supply it to them are needed. Palygorskite (Pal) is a natural silicate clay mineral and the palygorskite structure contains nano-channels, which are filled with water and exchangeable ions. Zn-bearing palygorskites (Zn-Pal) prepared using ion exchange have attracted attention due to the durable antibacterial properties that limit pathogens and as a potential new Zn source for livestock. The present study was conducted to evaluate the effects of Zn-Pal supplementation on the growth performance, nutrient retention, meat quality, Zn accumulation, and intestinal Zn transporter protein gene expression in blunt snout bream Megalobrama amblycephala. The fish were fed a basal diet without an exogenous Zn source and the basal diet was supplemented with 125 mg/kg Zn as Zn sulfate (ZnSO4) or 35, 80, or 125 mg/kg Zn as Zn-Pal. Each diet was tested using three replicates for 7 weeks. The results showed that dietary Zn-Pal supplementation quadratically (P0.05), increased mRNA expression of the metal-response element-binding transcription factor-1 in the intestine (P