Carpenter Corey B, Woodworth Jason C, Derouchey Joel M, Tokach Mike D, Goodband Robert D, Dritz Steve S, Wu Fangzhou, Rambo Zachary J
Department of Animal Science and Industry, College of Agriculture, Kansas State University, Manhattan, KS.
Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS.
Transl Anim Sci. 2019 Jul 27;3(4):1263-1269. doi: 10.1093/tas/txz112. eCollection 2019 Jul.
A total of 1,089 pigs (PIC 280 × 1050; initially 37.3 ± 2.8 kg) were used to determine the effects of increasing Cu provided from either CuSO alone or a 50:50 blend of CuSO and a Copper-amino acid complex (Cu-AA) on growth performance and carcass characteristics of finishing pigs. Pens of pigs were blocked by body weight; within blocks, pens were randomly allotted to one of six dietary treatments. The six dietary treatments consisted of a control diet which contained 17 mg/kg Cu from CuSO from the trace mineral premix, or the control diet with either added CuSO to provide 70 and 130 mg/kg total Cu or a 50:50 blend of Cu from CuSO and Cu-AA (CuSO/Cu-AA blend) to provide 70, 100, and 130 mg/kg total Cu. Experimental diets were corn-soybean meal-dried distillers grains with solubles-based and fed in meal form in five phases (approximately 37 to 46, 46 to 63, 63 to 77, 77 to 103, and 103 to 129 kg body weight). From d 0 to 43, neither Cu source nor level influenced growth performance. From d 43 to 105, average daily feed intake (ADFI) decreased ( = 0.037) for pigs fed the CuSO/Cu-AA blend compared to those fed added Cu from CuSO alone. Gain:feed ratio (G:F) tended to be improved (linear, = 0.056) as Cu concentration increased. Overall, d 0 to 105, neither Cu level nor source influenced average daily gain (ADG). Pigs fed 70 or 130 mg/kg total added Cu from the CuSO/Cu-AA blend had lower ( = 0.045) ADFI but G:F tended to be improved ( = 0.051) compared with those fed the same amount of total Cu from only CuSO4. Owing to the decreased ADFI and improved G:F of pigs fed the CuSO/Cu-AA blend, carcass G:F also improved ( = 0.033) compared with those fed added Cu from CuSO4 alone. In conclusion, providing a 50:50 blend of CuSO and Cu-AA improved G:F on both a live and carcass weight basis compared to CuSO4 alone with no differences in ADG or carcass ADG observed.
总共1089头猪（PIC 280×1050；初始体重37.3±2.8千克）用于确定单独添加硫酸铜（CuSO）或50:50混合的硫酸铜与氨基酸铜络合物（Cu-AA）所提供的铜增加量对育肥猪生长性能和胴体特性的影响。猪栏按体重进行分组；在每个组内，猪栏被随机分配到六种日粮处理中的一种。六种日粮处理包括一种对照日粮，其从微量矿物质预混料中含有17毫克/千克来自硫酸铜的铜，或者是添加硫酸铜以提供总铜含量为70和130毫克/千克的对照日粮，或者是硫酸铜与Cu-AA的50:50混合物（CuSO/Cu-AA混合物）以提供总铜含量为70、100和130毫克/千克。实验日粮以玉米-豆粕-干酒糟及其可溶物为基础，分五个阶段以粉料形式饲喂（体重约37至46、46至63、63至77、77至103和103至129千克）。从第0天到第43天，铜源和铜水平均未影响生长性能。从第43天到第105天，与仅饲喂添加硫酸铜的猪相比，饲喂CuSO/Cu-AA混合物的猪平均日采食量（ADFI）降低（P = 0.037）。随着铜浓度的增加，料重比（G:F）趋于改善（线性，P = 0.056）。总体而言，在第0天到第105天期间，铜水平和铜源均未影响平均日增重（ADG）。与仅饲喂硫酸铜提供相同总量铜的猪相比，饲喂来自CuSO/Cu-AA混合物中总添加铜70或130毫克/千克的猪ADFI较低（P = 0.045），但料重比趋于改善（P = 0.051）。由于饲喂CuSO/Cu-AA混合物的猪ADFI降低且料重比改善，与仅饲喂硫酸铜添加铜的猪相比，胴体料重比也有所改善（P = 0.033）。总之，与单独使用硫酸铜相比，提供50:50混合的硫酸铜和Cu-AA在活体和胴体体重基础上均改善了料重比，且未观察到平均日增重或胴体平均日增重的差异。
