油茶籽粕反刍动物饲料化利用价值初探
发布时间：2018-10-29 20:00
【摘要】：在分析油茶籽粕常规营养成分基础上,本试验采用体外产气和尼龙袋技术对油茶籽粕瘤胃发酵和降解特性进行了评定。结果显示:(1)油茶籽粕的粗蛋白、粗脂肪、中性洗涤纤维、酸性洗涤纤维、酸性洗涤木质素分别为13.1%、8.6%、66.2%、44.5%和25.4%(绝干物质基础);油茶籽粕的代谢能为4.30 MJ/kg DM;(2)油茶籽粕在体外发酵前期(2~12 h)的累积产气量显著高于羊草(P0.05),但36 h起油茶籽粕的累积产气量显著低于羊草(P0.05)。这与尼龙袋法测定的干物质降解率的变化趋势一致,油茶籽粕的干物质降解率在24~72 h显著低于羊草(P0.05),但在前期(3~12 h)二者的干物质降解率没有显著性差异(P0.05);(3)油茶籽粕25%替代羊草时不影响潜在产气量(P0.05),随替代比例的进一步增加(≥50%)慢速产气量显著降低(P0.05),但产气速度显著增加(P0.05),油茶籽粕25%替代羊草时不影响丙酸浓度(P0.05)。结果表明油茶籽粕含有较高的粗蛋白和粗脂肪,油茶籽粕替代羊草可提升全混合饲粮的发酵速度,提高丙酸所占挥发性脂肪酸比例;较高含量的木质素降低了其营养价值。
[Abstract]:Based on the analysis of the conventional nutritional components of Camellia oleifera seed meal, the rumen fermentation and degradation characteristics of Camellia oleifera meal were evaluated by in vitro gas production and nylon bag technology. The results showed that: (1) the crude protein, crude fat, neutral detergent fiber and acid detergent lignin of Camellia oleifera seed meal were 13. 1% and 6. 6% respectively. 44.5% and 25.4% (dry material base); Metabolic Energy of Camellia oleifera seed meal is 4.30 MJ/kg DM; (2) the cumulative gas production of Camellia oleifera seed meal at the early stage of in vitro fermentation was significantly higher than that of Leymus chinensis (P0.05), but the cumulative gas production of Camellia oleifera seed meal at 36 h was significantly lower than that of Leymus chinensis (P0.05). The degradation rate of dry matter of Camellia oleifera seed meal was significantly lower than that of Leymus chinensis at 2472 h (P0.05). However, there was no significant difference in the degradation rate of dry matter between the two groups in the early stage (3h) (P0.05). (3) the potential gas production was not affected by 25% oiltea seed meal (P0.05), but decreased significantly with the further increase of substitution ratio (鈮，
本文编号：2298666
[Abstract]:Based on the analysis of the conventional nutritional components of Camellia oleifera seed meal, the rumen fermentation and degradation characteristics of Camellia oleifera meal were evaluated by in vitro gas production and nylon bag technology. The results showed that: (1) the crude protein, crude fat, neutral detergent fiber and acid detergent lignin of Camellia oleifera seed meal were 13. 1% and 6. 6% respectively. 44.5% and 25.4% (dry material base); Metabolic Energy of Camellia oleifera seed meal is 4.30 MJ/kg DM; (2) the cumulative gas production of Camellia oleifera seed meal at the early stage of in vitro fermentation was significantly higher than that of Leymus chinensis (P0.05), but the cumulative gas production of Camellia oleifera seed meal at 36 h was significantly lower than that of Leymus chinensis (P0.05). The degradation rate of dry matter of Camellia oleifera seed meal was significantly lower than that of Leymus chinensis at 2472 h (P0.05). However, there was no significant difference in the degradation rate of dry matter between the two groups in the early stage (3h) (P0.05). (3) the potential gas production was not affected by 25% oiltea seed meal (P0.05), but decreased significantly with the further increase of substitution ratio (鈮，
本文编号：2298666
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