Division of Food Biosciences, College of Health and Medical Life Sciences, Konkuk University, Chung-Ju, Chung-Buk 380-701 Korea.
J Anim Sci Technol. 2016 May 25;58:21. doi: 10.1186/s40781-016-0102-8. eCollection 2016.
The aim of the present study was to determine the effects of feeding trace mineralsfortified mixed microbial culture (TMC) on ruminal fermentation, nutrient digestibility, blood electrolyte status, nitrogen balance, and trace mineral balance in sheep.
Mixed microbes [0.6 % (v/w) of Enterobacter sp., Bacillus sp., Lactobacillus sp., and Saccharomyces sp.] were cultured with 99 % feedstuffs and 0.4 % trace minerals including zinc and copper for ensiling. Six sheep (a mean body weight of 46.5 ± 1.2 kg) were fed two diets: a control diet (concentrate mix and rye straw) and an experimental diet (a control diet + 3.1 % TMC).
TMC feeding did not induce negative effects on ruminal fermentation, nutrient digestibility, blood electrolytes, and nitrogen balance in sheep. Feeding with TMC increased the intake of trace minerals (p < 0.05) and did not affect absorption of trace minerals in the whole digestive tract. Feeding with TMC increased fecal excretion and absorbable intake, and retention of zinc and copper (p < 0.05) by 71 % and 77 %, respectively.
Feeding with TMC resulted in higher zinc and copper bioavailability and retention without any adverse effects on sheep performance.
本研究旨在确定给绵羊饲喂添加痕量矿物质的混合微生物培养物（TMC）对瘤胃发酵、养分消化率、血液电解质状况、氮平衡和痕量矿物质平衡的影响。
将混合微生物（Enterobacter sp.、Bacillus sp.、Lactobacillus sp.和 Saccharomyces sp.，分别占 0.6%（v/w））与 99%的饲料和 0.4%的痕量矿物质（包括锌和铜）一起培养进行青贮。给 6 只绵羊（平均体重为 46.5±1.2kg）饲喂两种日粮：对照日粮（精料混合物和黑麦草）和试验日粮（对照日粮+3.1% TMC）。
TMC 饲喂未对绵羊的瘤胃发酵、养分消化率、血液电解质和氮平衡产生负面影响。TMC 饲喂增加了微量元素的摄入量（p<0.05），但不影响整个消化道对微量元素的吸收。TMC 饲喂增加了粪便排泄量和可吸收量，锌和铜的保留率分别提高了 71%和 77%（p<0.05）。
TMC 饲喂提高了锌和铜的生物利用率和保留率，而对绵羊的生产性能没有任何不良影响。
