Effects of phenolic compounds in propolis on digestive and ruminal parameters in dairy cows
Effects of phenolic compounds in propolis on digestive and ruminal parameters in dairy cows
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DOI：
10.1590/s1516-35982014000400006
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发表时间：
2014-04-01
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影响因子：
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通讯作者：
Zeoula, Lucia Maria
中科院分区：
文献类型：
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作者：
Aguiar, Sílvia Cristina de;Paula, Eduardo Marostegan de;Zeoula, Lucia Maria
采用4 × 4拉丁方试验设计，研究了不同浓度蜂胶和酒精对4头经瘤胃泌乳奶牛的总消化率（TD）、瘤胃消化率（RD）、肠道消化率（ID）、pH、瘤胃氨氮（NH3-N）、瘤胃微生物合成和血液指标的影响。饲料由591.9g/kg玉米青贮和408.1g/kg精料组成（干物质[DM]基础），和处理不同方面的纳入（通过瘤胃插管）或排除PBP如下：控制（无PBP），PBP B1（3.81毫克酚类化合物/公斤摄入的DM）、PBP C1（3.27毫克酚类化合物/公斤摄入的DM）和PBP C3（1.93毫克酚类化合物/公斤摄入的DM）。添加PBP可降低日粮粗蛋白的RD。与对照相比，PBP C1处理降低了瘤胃NH3-N的产生，而PBP B1处理提高了CP的ID。这些结果表明，瘤胃氮代谢有积极的影响。瘤胃pH值，微生物蛋白质合成效率，血液参数没有受到影响，通过添加PBP，但有显着的影响，其他参数时，处理含有草甘膦进行了对比。当比较PBP C1与C3时，观察到DM（0.717 vs. 0.685）、OM（0.737 vs. 0.703）和CP（0.760 vs. 0.739）的TD较高，以及NDF（0.622 vs. 0.558）和TDN（0.747 vs. 0.712）较高。在奶牛日粮中添加大豆蛋白对瘤胃蛋白质代谢有积极影响。不同PBP中酚类化合物含量的变化可以解释对消化参数的不同影响。
Four rumen-cannulated primiparous lactating cows were studied in a 4 x 4 Latin square design experiment to evaluate the effects of propolis-based products (PBP) with different concentrations of propolis and alcohol levels on total digestibility, (TD), ruminal digestibility (RD), intestinal digestibility (ID), pH, ruminal ammonia-nitrogen production (NH3-N), rumen microbial synthesis, and blood parameters. The feed consisted of 591.9 g/kg corn silage and 408.1 g/kg concentrate (dry matter [DM] basis), and treatments differed with regard to the inclusion (via ruminal cannula) or exclusion of PBP as follows: control (without the PBP), PBP B1 (3.81 mg of phenolic compounds/kg of ingested DM), PBP C1 (3.27 mg of phenolic compounds/kg of ingested DM), and PBP C3 (1.93 mg of phenolic compounds/kg of ingested DM). Inclusion of PBP reduced the RD of dietary crude protein (CP). Treatment PBP C1 reduced ruminal NH3-N production, while PBP B1 increased the ID of CP relative to that in the control. These findings indicate that propolis had a positive effect on rumen nitrogen metabolism. Rumen pH, efficiency of microbial protein synthesis, and blood parameters were not affected by addition of PBP, but there were significant effects on the other parameters when the treatments containing propolis were contrasted. Higher TD of DM (0.717 vs. 0.685), OM (0.737 vs. 0.703), and CP (0.760 vs. 0.739), as well as higher NDF (0.622 vs. 0.558) and TDN (0.747 vs. 0.712) were observed when comparing PBP C1 with C3. Inclusion of propolis in diets for dairy cows have positive effects on protein metabolism in the rumen. Variation in the amounts of phenolic compounds in the different PBP may explain the diverse effects on the digestive parameters evaluated.