Increasing doses of chitosan to grazing beef steers: Nutrient intake and digestibility, ruminal fermentation, and nitrogen utilization
Increasing doses of chitosan to grazing beef steers: Nutrient intake and digestibility, ruminal fermentation, and nitrogen utilization
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DOI：
10.1016/j.anifeedsci.2017.01.015
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发表时间：
2017-03-01
影响因子：
3.2
通讯作者：
Vaz, M. S. M.
中科院分区：
文献类型：
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作者：
Dias, A. O. C.;Goes, R. H. T. B.;Vaz, M. S. M.
壳聚糖（CHI）是生物聚合物甲壳素的衍生物，在甲壳类动物的壳废物中大量存在，并具有抗菌特性。本研究的目的是确定增加剂量的CHI放牧牛的营养摄入量和总表观消化率，瘤胃发酵参数，微生物蛋白质合成，氮利用，尿素和肌酐代谢的影响。采用5 × 5拉丁方试验设计，试验期21天，最后7天用于数据收集。将阉牛随机分配到一个含有壳聚糖（脱乙酰度>= 850 g/kg，密度0.32 g/mL，pH 7.90，粘度0.35 g/mL）的处理序列。
Chitosan (CHI) is a derivative of the biopolymer chitin, found in high amounts in the shell wastes of crustaceans, and has antimicrobial properties. The objective of this study was to determine the influence of increasing doses of CHI for grazing cattle on nutrient intake and total apparent digestibility, ruminal fermentation parameters, microbial protein synthesis, nitrogen utilization, and urea and creatinine metabolism. Five rumen cannulated crossbred steers [3.6 mo and 300 1 25 kg live weight (LW), mean SD] were used in a 5 x 5 Latin square experiment design with 21-d periods, in which the last 7 days were used for data collection. Steers were randomly designated to one treatment sequence containing chitosan (>= 850 g/kg deacetylation degree, 0.32 g/mL density, pH 7.90, and viscosity