Feasibility of feeding cadmium accumulator maize(Zea mays L.)to beef cattle:Discovering a strategy for eliminating phytoremediation residues  

作　　者：Zebang Xu Bin Yang Kangle Yi Tianrong Chen Xinxin Xu Ao Sun Haobang Li Jianbo Li Fang He Cheng Huan Yang Luo Jiakun Wang 

机构地区：[1]Institute of Dairy Science,College of Animal Sciences,Zhejiang University,Hangzhou,310058,China [2]School of Biological and Chemical Engineering,Zhejiang University of Science and Technology,Hangzhou,310023,China [3]Hunan Institute of Animal and Veterinary Science,Changsha,410131,China

出　　处：《Animal Nutrition》2023年第4期1-9,共9页动物营养（英文版）

基　　金：supported by the Department of Agriculture and Rural Affairs of Hunan Province,the Construction of Modern Agricultural Industrial Technology System in Hunan Province(Hunan Financial Agriculture Guide 2019[97]).

摘　　要：Eco-friendly and efficient strategies for eliminating cadmium (Cd) phytoremediation plant residues are needed. The present study investigated the feasibility of feeding Cd accumulator maize to beef cattle. In total, 20 cattle at 6 months of age were selected and randomly allocated into two groups fed with 85.82%(fresh basis) Cd accumulator maize (CAM) or normal maize (control [Con]) silage diets for 107 d. Feeding CAM did not affect the body weight (P=0.24), while it decreased feed intake and increased feed efficiency of beef cattle (P <0.01). Feeding CAM increased serum concentrations of immunoglobulin A and G, complement 3 and 4, blood urea nitrogen, and low-density lipoprotein cholesterol, decreased serum concentrations of interleukin-6 and lipopolysaccharide (P <0.05), and caused wider lumens in the renal tubules. The Cd residue in meat was 7μg/kg beyond the restriction for human food. In the muscle, the unsaturated fatty acids (t11C18:1 and C20:4), Lys, Arg, Pro, and Cys were decreased, while the saturated fatty acids (C10:0, C12:0, and C17:0) and Leu were increased (P <0.05). Therefore, at the current feeding level, phytoremediation maize increased the feed efficiency of beef cattle, but did present risks to cattle health and production safety, and decreased the meat nutrition and flavor. Further research must be performed to determine whether a lower proper dose of phytoremediation maize and an appropriate feeding period may be possible to ensure no risk to cattle health and the supply of safe meat for humans.

关 键 词：Beef cattle CADMIUM Performance Health 

分 类 号：S823.5[农业科学—畜牧学]