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Effect of rare earth elements on feed digestibility, rumen fermentation, and purine derivatives in sheep

文献类型： 外文期刊

作者： Xun, Wenjuan 1 ; Shi, Liguang 1 ; Hou, Guanyu 1 ; Zhou, Hanlin 1 ; Yue, Wenbin 2 ; Zhang, Chunxiang 2 ; Ren, Youshe 2 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Trop Crops Genet Resourses Inst, Danzhou, Peoples R China

2.Shanxi Agr Univ, Coll Anim Sci & Technol, Taigu, Peoples R China

关键词： Rare earth elements;Sheep;Feed digestibility;Rumen fermentation;Urinary purine derivatives

期刊名称：ITALIAN JOURNAL OF ANIMAL SCIENCE （ 影响因子：2.217； 五年影响因子：2.376 ）

ISSN： 1594-4077

年卷期： 2014 年 13 卷 2 期

页码：

收录情况： SCI

摘要： The experiment was conducted to evaluate the effect of rare earth elements (REE) on feed digestibility, rumen fermentation, and urinary purine derivatives (PDs) in sheep. Eight sheep (44.58 +/- 2.9 kg of body weight) fitted with ruminal cannulas were used in a replicated 4x4 Latin square design 20-day experiment. Sheep were fed a basal diet containing 100, 200 and 300 mg REE-citrate per kg dry matter (DM). Mixture of REE mainly consisted of cerium (56.8%). lanthanum (35.0%) and praseodymium (6.5%). Ruminal pH value was linearly (P<0.01) and quadratically (P<0.01) decreased, and ammonia N concentration (9.73 to 11.83 mg/100 mL) was quadratically (P<0.05) decreased, whereas total volatile fatty acids concentration was linearly increased with increasing REE supplementation (P<0.05). The ratio of acetate to propionate was linearly (P<0.01) and quadratically (P<0.01) decreased due to increase of propionate concentration (P<0.05). In situ ruminal neutral detergent fibre (aNDF) degradation of Leymus chinensis was improved (P<0.01), but the in situ ruminal crude protein (CP) degradation of soybean meal was decreased by feeding REE (P<0.01). Moreover, digestibility, of DM, organic matter, aNDF, acid detergent fibre and CP in the total tract and urinary excretion of PD were also linearly (P<0.01) and quadratically (P<0.01) increased with increasing REE addition. In conclusion, supplementation of the basal diet with REE improved rumen fermentation and feed digestion in sheep. It was suggested that REE stimulated rumen microbial activity, digestive microorganisms or enzyme activity in a dose-dependent manner. The optimum supplemental dose of REE was about 200 mg/kg dietary DM in sheep.

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[1]Effect of high-dose nano-selenium and selenium-yeast on feed digestibility, rumen fermentation, and purine derivatives in sheep. Xun, Wenjuan,Yue, Wenbin,Zhang, Chunxiang,Ren, Youshe,Liu, Qiang,Xun, Wenjuan,Shi, Liguang.

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