添加纤维素酶或甲酸对青贮菠萝茎叶饲用品质的影响

Effect of Cellulase or Formic Acid on Feeding Value of Silage Pineapple Leaves

本试验旨在研究添加不同浓度的纤维素酶或甲酸青贮菠萝茎叶后对其饲用品质的影响。以菠萝茎叶作为研究材料,青贮处理方式分别为直接青贮(对照组)及添加0.1g/kg纤维素酶、0.2g/kg纤维素酶和3.0g/kg甲酸、6.0g/kg甲酸青贮,青贮45d后进行营养成分、养分的瘤胃降解分析。结果表明,与对照组相比,2个纤维素酶处理组显著提高了单宁含量(P<0.05),其他成分含量均没有显著变化(P>0.05);3.0g/kg甲酸处理组显著降低了氨态氮(NH3-N)、钙和磷含量(P<0.05),显著提高了可溶性碳水化合物(WSC)含量(P<0.05);6.0g/kg甲酸处理组显著提高了干物质(DM)、可溶性碳水化合物含量(P<0.05),显著降低了粗蛋白质(CP)、酸性洗涤纤维(ADF)、中性洗涤纤维(NDF)、氨态氮、钙和磷含量(P<0.05);6.0g/kg甲酸处理组显著提高了72h内干物质的瘤胃降解率(P<0.05),而对72h粗蛋白质降解率和中性洗涤纤维降解率无显著影响(P>0.05)。综上所述,在本试验条件下,添加6.0g/kg甲酸青贮菠萝茎叶效果最好,其次为直接青贮组。

The research was designed to study the effect of cellulose or formic acid on feeding value of silage pineapple leaves.The treatment included the silage directly（control group）,silage with 0.1g/kg cellulose group,with 0.2g/kg cellulose group,with 3.0g/kg formic acid group,with 6.0g/kg formic acid group.Nutrients content and rumen degradation of nutrients were analyzed after silage for 45 days.The results showed that compared with the control group,two groups of cellulose significantly increased the content of tannins（P〈0.05）,while the other contents of ingredients were not significantly changed（P〈0.05）.Addition of 3.0g/kg formic acid significantly decreased the contents of ammoniacal nitrogen（NH3-N）,Ca and P（P〈0.05）,but significantly increased the content of water soluble carbohydrates（WSC）（P〈0.05）.Addition of 6.0g/kg formic acid significantly increased the contents of dry matter（DM）and WSC（P〈0.05）,but significantly decreased the contents of crude protein（CP）,acid detergent fiber（ADF）,neutral detergent fiber（NDF）,NH3-N,Ca and P（P〈0.05）.Addition of 6.0g/kg formic acid significantly increased the degradation rate of DM within 72h（P〈0.05）,but had no significant effect on the degradation rates of CP and NDF at 72h（P〈0.05）.In conclusion,under this experiment condition,adding 6.0g/kg formic acid had the best quality of silage pineapple leaves,followed by the direct silage group.