用较低水平的有机微量矿物质替代生长育肥猪日粮中的无机微量矿物质，可提高其抗氧化能力、养分消化率，并减少粪便中矿物质的排泄。
Dietary replacement of inorganic trace minerals with lower levels of organic trace minerals leads to enhanced antioxidant capacity, nutrient digestibility, and reduced fecal mineral excretion in growing-finishing pigs.
作者信息
Xiong Yunxia, Cui Bailei, He Zhentao, Liu Shuai, Wu Qiwen, Yi Hongbo, Zhao Fei, Jiang Zongyong, Hu Shenglan, Wang Li
机构信息
State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China Ministry of Agriculture, Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China.
DeBon Bio-Tech Co., Ltd., Hengyang, Hunan, China.
出版信息
Front Vet Sci. 2023 May 25;10:1142054. doi: 10.3389/fvets.2023.1142054. eCollection 2023.
INTRODUCTION
More effective and environment-friendly organic trace minerals have great potential to replace the inorganic elements in the diets of livestock. This study aimed to investigate the effects of dietary replacement of 100% inorganic trace minerals (ITMs) with 30-60% organic trace minerals (OTMs) on the performance, meat quality, antioxidant capacity, nutrient digestibility, and fecal mineral excretion and to assess whether low-dose OTMs could replace whole ITMs in growing-finishing pigs' diets.
METHODS
A total of 72 growing-finishing pigs (Duroc × Landrace × Yorkshire) with an initial average body weight of 74.25 ± 0.41 kg were selected and divided into four groups with six replicates per group and three pigs per replicate. The pigs were fed either a corn-soybean meal basal diet containing commercial levels of 100% ITMs or a basal diet with 30, 45, or 60% amino acid-chelated trace minerals instead of 100% ITMs, respectively. The trial ended when the pigs' weight reached ~110 kg.
RESULTS
The results showed that replacing 100% ITMs with 30-60% OTMs had no adverse effect on average daily gain, average daily feed intake, feed/gain, carcass traits, or meat quality ( > 0.05) but significantly increased serum transferrin and calcium contents ( < 0.05). Meanwhile, replacing 100% ITMs with OTMs tended to increase serum T-SOD activity (0.05 ≤ < 0.1), and 30% OTMs significantly increased muscle Mn-SOD activity ( < 0.05). Moreover, replacing 100% ITMs with OTMs tended to increase the apparent digestibility of energy, dry matter, and crude protein (0.05 ≤ < 0.1) while significantly reducing the contents of copper, zinc, and manganese in feces ( < 0.05).
DISCUSSION
In conclusion, dietary supplementation with 30-60% OTMs has the potential to replace 100% ITMs for improving antioxidant capacity and nutrient digestibility and for reducing fecal mineral excretion without compromising the performance of growing-finishing pigs.
引言
更高效且环保的有机微量元素在替代家畜日粮中的无机元素方面具有巨大潜力。本研究旨在探究用30%-60%的有机微量元素（OTM）替代100%无机微量元素（ITM）对生长育肥猪生产性能、肉质、抗氧化能力、养分消化率以及粪便矿物质排泄的影响，并评估低剂量OTM是否能够替代生长育肥猪日粮中的全部ITM。
方法
总共挑选72头初始平均体重为74.25±0.41千克的生长育肥猪（杜洛克×长白×大白），分为四组，每组六个重复，每个重复三头猪。分别给猪饲喂含有商业水平100%ITM的玉米-豆粕基础日粮，或分别用30%、45%或60%氨基酸螯合微量元素替代100%ITM的基础日粮。试验在猪体重达到约110千克时结束。
结果
结果表明，用30%-60%的OTM替代100%的ITM对平均日增重、平均日采食量、料重比、胴体性状或肉质没有不利影响（P>0.05），但显著提高了血清转铁蛋白和钙含量（P<0.05）。同时，用OTM替代100%的ITM有提高血清总超氧化物歧化酶（T-SOD）活性的趋势（0.05≤P<0.1），30%的OTM显著提高了肌肉锰超氧化物歧化酶（Mn-SOD）活性（P<0.05）。此外，用OTM替代100%的ITM有提高能量、干物质和粗蛋白表观消化率的趋势（0.05≤P<0.1），同时显著降低了粪便中铜、锌和锰的含量（P<0.05）。
讨论
总之，日粮中添加30%-60%的OTM有潜力替代100%的ITM，以提高抗氧化能力和养分消化率，并减少粪便矿物质排泄，同时不影响生长育肥猪的生产性能。
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