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首页> 外文期刊>Indian Journal of Small Ruminants >Effect of levels of concentrate on rumen fermentation and methane production in vitro and in weaner Barbari kids.
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Effect of levels of concentrate on rumen fermentation and methane production in vitro and in weaner Barbari kids.

机译：浓缩物水平对体外和断奶仔猪瘤胃发酵和甲烷产生的影响。

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An experiment assessed the effect of varying concentrate levels in diet on in vitro fermentation characteristics and methane production and in vivo rumen fermentation characteristics in kids. Four composite feed mixtures (CFM) were prepared with 0 (T1), 20 (T2), 40 (T3) and 60% (T4) concentrate. The CFM contained roughage gram straw and cowpea fodder in 60:40, 50:30, 38:22 and 25:15 ratios in T1, T2, T3 and T4 respectively In vitro experiment studied dry matter digestibility (IVDMD), fermentation characteristics and methane production?, while rumen fermentation characteristics (pH, N and VFA fractions) were studied in kids. The microbial inoculums for in vitro study was collected from kids fed respective diets at 89 (P1) and 166 (P2) days of kid feeding. In vitro experiment revealed that increasing concentrate levels improved (P<0.05) IVDMD of diet, which ranged from 60.8 to 65.6% and was the highest in T4. Total gas production did not change by concentrate levels while methane production was reduced (P<0.05) with increasing levels of concentrate in the diets. Methane production varied from 46.1 to 39.63 ml and 76.0 to 62.6 ml, respectively on each g DM incubated and on each g DM fermented. Methane production was 76.0, 69.3, 63.2 and 62.3 ml per g DM fermented respectively at 0, 20, 40 and 60% concentrate levels, which accounted a reduction of 9.7, 20.3 and 221.5% methane at respective concentrate levels. The pH of fermentation medium reduced (P<0.05), whereas total N, NH3-N, TCA-ppt-N and TVFA increased (P<0.05) by increasing concentrate levels in the diet. The fractional VFA and A/P ration was similar among four treatments. In vitro observation was not affected by the microbial inoculums used from kids between the two periods. Rumen fermentation characteristics of kids viz., pH, total N, TCA-ppt-N and TVFA followed the trend of in vitro fermentation. The NH3-N of rumen fluid was not different among kids fed four diets, while propionate production increased (P<0.05) and A/P ratio reduced (P<0.05) with increasing concentrate level in diet. It is concluded that increasing concentrate level in the diet of kids from 0 to 60% increased dry matter digestibility, promoted rumen fermentation and reduced methane production.
机译：实验评估了饮食中不同浓度的浓缩物对儿童体外发酵特性，甲烷生成和体内瘤胃发酵特性的影响。用0（T1），20（T2），40（T3）和60％（T4）浓缩物制备了四种复合进料混合物（CFM）。 CFM分别在T1，T2，T3和T4中以60：40、50：30、38：22和25:15的比例包含粗麦草和cow豆饲料体外实验研究了干物质消化率（IVDMD），发酵特性和甲烷在儿童中研究瘤胃发酵特性（pH，N和VFA分数）。用于体外研究的微生物接种物是从在喂食第89天（P1）和第166天（P2）喂食了不同饮食的孩子身上收集的。体外实验表明，日粮中浓缩物水平的提高改善了IVDMD水平（P <0.05），介于60.8％至65.6％之间，是T4中最高的。随着日粮中浓缩物含量的增加，总的天然气产量不会因浓缩物水平而改变，而甲烷的产生则减少（P <0.05）。孵育的每克DM和发酵的每克DM的甲烷产量分别为46.1至39.63 ml和76.0至62.6 ml。每克DM分别以0、20、40和60％浓缩物水平发酵的甲烷产量为76.0、69.3、63.2和62.3 ml，这意味着在相应的浓缩物水平下甲烷减少了9.7、20.3和221.5％。发酵液的pH降低（P <0.05），而总氮，NH 3 -N，TCA-ppt-N和TVFA的增加通过提高日粮中的浓缩水平而达到（P <0.05）。在四种治疗中，VFA和A / P比例分数相似。在两个时期之间，体外观察不受孩子使用的微生物接种量的影响。儿童的瘤胃发酵特性，即pH，总氮，TCA-ppt-N和TVFA遵循体外发酵的趋势。喂养四种饮食的儿童的瘤胃液NH 3 -N并无差异，但随着饮食中浓缩物浓度的增加，丙酸盐产量增加（P <0.05），A / P比降低（P <0.05）。 。结论是，将儿童饮食中的浓缩物含量从0％提高到60％，可以提高干物质消化率，促进瘤胃发酵并减少甲烷产生。

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