College of Bioresource Sciences, Nihon University, Fujisawa, Japan.
Kankyo Techsys Co. Ltd., Toyokawa, Japan.
Anim Sci J. 2021 Jan-Dec;92(1):e13535. doi: 10.1111/asj.13535.
The intake, digestion, and ruminal fermentation properties; the antioxidative activity; and the physical effectiveness of pineapple residue (PR) from the cut-fruit industry as a feed for cattle were investigated. Four nonlactating Holstein cows were fed a basal diet and diets with 1.4- and 3.6-kg dry matter (DM)/day of PR (low-PR and high-PR diets, respectively). The DM digestibility and total digestible nutrients were 71% and 70%, respectively. Ruminal pH, volatile fatty acids, and ammonia-N did not differ among the diets. The numbers of total viable, amylolytic, cellulolytic, and methanogenic bacteria and protozoa, and microbial protein synthesis in the rumen also did not differ significantly. Blood triglyceride, nonesterified fatty acids, urea nitrogen, and aspartate transaminase were lower in the high-PR diet. Feeding PR did not affect blood malondialdehyde, although PR has a higher antioxidative value than other commonly used feeds. The particle distribution of PR satisfied the recommended range for haylage. The chewing time for ingestion and rumination did not change with PR content, and the roughage value index of PR was 57-min/kg DM. These results suggest that PR has good intake and digestion properties and satisfactory physical effectiveness. Even a high-PR-content feed unlikely induces the risk of ruminal acidosis.
菠萝渣（PR）作为一种牛饲料的摄入、消化和瘤胃发酵特性；抗氧化活性；以及物理有效性，从水果加工行业中进行了研究。将 4 头非泌乳荷斯坦奶牛分别饲喂基础日粮和含 1.4kg 和 3.6kg 干物质（DM）/天 PR 的日粮（低 PR 和高 PR 日粮）。DM 消化率和总可消化养分分别为 71%和 70%。瘤胃 pH 值、挥发性脂肪酸和氨态氮在各日粮间无差异。总活菌数、淀粉分解菌、纤维素分解菌和产甲烷菌以及瘤胃微生物蛋白合成也无显著差异。高 PR 日粮中血液甘油三酯、非酯化脂肪酸、尿素氮和天冬氨酸转氨酶水平较低。PR 虽然具有比其他常用饲料更高的抗氧化值，但对血液丙二醛没有影响。PR 的颗粒分布符合青贮料的推荐范围。摄入和反刍的咀嚼时间不受 PR 含量的影响，PR 的粗饲料价值指数为 57min/kg DM。这些结果表明，PR 具有良好的摄入和消化特性，以及令人满意的物理有效性。即使是高 PR 含量的饲料也不太可能引发瘤胃酸中毒的风险。
