饲粮添加α-酮戊二酸对生长猪氮及钙、磷代谢的影响

发布时间：2018-03-14 13:44

本文选题：α-酮戊二酸　切入点：生长猪　出处：《动物营养学报》2016年07期 　论文类型：期刊论文

【摘要】：本试验旨在研究低蛋白质饲粮添加α-酮戊二酸(α-ketoglutarate,AKG)对生长猪氮以及钙、磷代谢的影响。试验选用初始体重为(34.98±2.18)kg的健康三元杂交(杜×长×大)猪18头,按体重相近、性别比例相同原则随机分为3组,每组6个重复,每个重复1头。各组AKG的添加水平分别为0(对照组)、1%和2%。先进行为期14 d的饲养试验,观察生长性能;然后进行消化代谢试验,试验期为7 d,前5 d为预试期,后2 d为粪尿收集期(全收粪法)。结果表明:1)1%AKG添加组有改善35~45 kg生长猪生长性能的趋势,具体表现为提高平均日增重(P=0.194 2)和平均日采食量(P=0.258 3),降低料重比(P=0.419 7)。2)随着AKG添加水平提高,尿氮含量有下降趋势(P=0.143 2),粪氮、总氮含量及总氮排放率极显著降低(P0.01),氮表观消化率和蛋白质净利用率极显著提高(P0.01)。与对照组相比,1%与2%AKG添加组尿氮含量分别降低了13.31%和41.88%,粪氮含量分别降低了18.73%和54.69%,总氮排放率分别降低了20.57%和50.00%,氮表观消化率分别提高了2.60%和6.32%,蛋白质净利用率分别提高了2.68%和6.51%。3)2%AKG添加组钙食入量、粪钙和粪磷含量显著低于对照组(P0.05),而钙表观消化率和磷表观消化率却显著高于对照组(P0.05);尿钙和尿磷含量有低于其他各组的趋势,但各组间差异不显著(P0.05)。由此可见,在35~45 kg的生长猪饲粮中添加1%~2%AKG可有效降低机体氮、钙、磷排放,提高氮及钙、磷的利用率和日增重。
[Abstract]:The purpose of this experiment was to study the effect of 伪 -ketoglutarate (伪 -ketoglutarate AKG) on nitrogen, calcium and phosphorus metabolism in growing pigs. Eighteen pigs with initial weight of 34.98 卤2.18kg were selected for the experiment. The principle of the same sex ratio was randomly divided into 3 groups, 6 replicates in each group and 1 repeat in each group. The levels of AKG supplementation in each group were 0 (control group 1% and 2% respectively). A 14-day feeding experiment was conducted to observe the growth performance. Then the digestion and metabolism test was carried out. The trial period was 7 days, the first 5 days was the pre-test period, and the latter 2 days was the fecal and urine collection period. The results showed that the growth performance of 35 45 kg growing pigs was improved in the addition group of 1: 1 + 1 AKG. The results showed that the average daily gain was increased by 0.1942) and the average daily feed intake was increased by 0.2583N, and the ratio of feed to weight was decreased by P0. 4197U. 2) with the increase of AKG addition level, the urinary nitrogen content tended to decrease, and the fecal nitrogen content decreased with the increase of AKG addition level. Total nitrogen content and total nitrogen emission rate decreased significantly (P 0.01), apparent nitrogen digestibility and protein net utilization ratio increased significantly. Compared with control group, urine nitrogen content of 1% and 2AKG addition group decreased by 13.31% and 41.88%, and fecal nitrogen content decreased by 18.73%, respectively. The total nitrogen emission rate decreased by 20.57% and 50.005, the apparent nitrogen digestibility increased by 2.60% and 6.32, and the net protein utilization rate increased by 2.68% and 6.51, respectively. The contents of fecal calcium and fecal phosphorus were significantly lower than those of the control group (P 0.05), but the apparent digestibility of calcium and phosphorus were significantly higher than those of the control group (P 0.05), and the urinary calcium and phosphorus contents were lower than those of the other groups, but the differences among the groups were not significant. The nitrogen, calcium, phosphorus emission, nitrogen and calcium, phosphorus utilization and daily gain were significantly decreased by adding 1 + 2 AKG to the growth pig diet of 35 ~ 45 kg.
【作者单位】：中国科学院亚热带农业生态研究所中国科学院亚热带农业生态过程重点实验室湖南省畜禽健康养殖工程技术中心农业部中南动物营养与饲料科学观测实验站;湖南农业大学动物科学技术学院;
【基金】：国家973项目专题(2013CB127306) 国家自然科学基金面上项目(31472107) 湖南省“湖湘青年科技创新人才”项目(2015RS4053) 中科院“百人计划”项目
【分类号】：S828.5

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