应用CNCPS法和体外产气法评价苹果渣作为反刍动物非粮饲料的潜力

发布时间：2018-09-09 19:52

【摘要】：试验旨在应用康奈尔净碳水化合物—蛋白质体系(CNCPS)和体外产气法评定不同地方苹果渣的营养价值,以采集自辽宁锦州、北京、河北唐山、安徽砀山的4种苹果渣为研究对象,采用CNCPS中碳水化合物和含氮化合物的分类方法,测定苹果渣的营养成分,评定其营养价值,同时采用体外产气法评定苹果渣的发酵情况,并计算其能量价值。结果显示,不同地域来源的苹果渣的营养成分存在显著差异,且CNCPS碳水化合物、蛋白质组分的优劣不同。在含氮化合物组分中,苹果渣的非蛋白氮(PA)含量较高,均高于60%;而快速降解蛋白(PB1)含量较低,均低于3%。在碳水化合物组分中,苹果渣的不可利用的细胞壁(CC)含量较高,为51%~63%。北京苹果渣的最大产气量(B)最高,极显著高于其他3种苹果渣(P0.01),而唐山苹果渣的产气速度(C)极显著高于北京苹果渣和砀山苹果渣(P0.01)。砀山苹果渣氨态氮(NH_3-N)含量最高,极显著高于其他苹果渣(P0.01)。不同地方苹果渣瘤胃液挥发性脂肪酸比例差异极显著(P0.01)。不同地方的苹果渣的总可消化养分(TDN)及其他能值差异较大,以砀山苹果渣的能值最高,极显著高于其他苹果渣(P0.01)。综上可知,不同地域来源的苹果渣在化学成分、体外瘤胃发酵参数和能量价值方面存在显著差异。本试验在补充中国肉牛常用饲料数据库的同时,也为非粮饲料的开发利用奠定了数据基础,以达到科学合理利用的目的。
[Abstract]:The aim of the experiment was to use Cornell net carbohydrate protein system (CNCPS) and gas production method in vitro to evaluate the nutritional value of apple pomace in different places. Four kinds of apple dregs collected from Jinzhou, Beijing, Tangshan, Hebei and Dangshan, Anhui Province were collected from Jinzhou, Liaoning Province, Beijing, Hebei and Anhui, respectively. The classification method of carbohydrate and nitrogen-containing compounds in CNCPS was used to determine the nutrient composition of apple pomace and evaluate its nutritional value. At the same time, the fermentation condition of apple dregs was evaluated by gas production method in vitro, and its energy value was calculated. The results showed that there were significant differences in nutrient components of apple pomace from different regions, and the carbohydrates and protein components of CNCPS were different. The content of non-protein nitrogen (PA) in apple pomace was higher than that of 60%, while the content of rapidly degradable protein (PB1) was lower than that of 3%. In the carbohydrate component, the content of (CC) in the unusable cell wall of apple pomace is higher, which is 51% and 63%. The maximum gas production rate (B) of Beijing apple pomace was the highest, which was significantly higher than that of the other three kinds of apple pomace (P0.01), while the gas production rate of Tangshan apple residue was significantly higher than that of Beijing apple residue and Dangshan apple residue (P0.01). The content of ammonia nitrogen (NH_3-N) in Dangshan apple pomace was the highest, which was significantly higher than that of other apple pomace (P0.01). The ratio of volatile fatty acids in rumen fluid of apple pomace was significantly different (P0.01). The total digestible nutrient (TDN) and other energy values of apple pomace in different places were different greatly. Dangshan apple residue had the highest energy value which was significantly higher than that of other apple dregs (P0.01). In conclusion, there were significant differences in chemical composition, rumen fermentation parameters and energy value of apple dregs from different regions. This experiment not only supplements the common feed database of Chinese beef cattle, but also establishes the data base for the development and utilization of non-grain feed, in order to achieve the purpose of scientific and reasonable utilization.
【作者单位】：中国农业大学动物科技学院动物营养学国家重点实验室全国畜牧总站
【基金】：国家自然科学基金面上项目(31372335) 国家肉牛牦牛产业技术体系项目(CARS-38) 公益性行业(农业)科研专项经费项目(201503134)
【分类号】：S816.5

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