中国水产科学2018，Vol.25Issue(1)：86-96,11.DOI:10.3724/SP.J.1118.2018.17098
两种水温条件下团头鲂对7种蛋白源饲料表观消化率的比较
Comparative study of the apparent digestibility of seven feed protein ingredients at different temperatures in Megalobrama amblycephala
摘要
Abstract
Blunt snout bream (Megalobrama amblycephala) is an herbivorous fish belonging to the Cyprinidae family. It has been widely cultured in China due to its excellent value. Research on the feed ingredients should be conducted to optimize feed formula under various circumstances. This study investigated the apparent digestibility of dry matter (DM), crude protein (CP), gross energy (GE), total amino acid (TAA), and essential amino acid (EAA) in fish meal (FM), meat and bone meal (MBM), soybean meal (SBM), rapeseed meal (RSM), cottonseed meal (CSM), yeast extract fermentation (YEF), and peanut meal (PNM) at different temperatures (25℃ and 30℃) indicated by 0.05% Y2O3for blunt snout bream (34.38±2.16 g). The diets consisted of a 70% basal diet and 30% test ingredients. Fish were fed twice daily in recirculation water system aquaria for 4 weeks. During the feeding trial, excrement was collected 30 minutes after feeding, then dried and stored for analysis. At 30℃, the apparent digestibility of DM, CP, GE, TAA, and EAA was approximately 24.88%–90.63%, 52.32%–94.88%, 47.77%–102.68%, 51.18%–95.15%, 42.97%–95.5%, and 50.49%–94.9%, respectively. YEF had the highest apparent di-gestibility of DM, CP, GE, and EAA. SBM had the highest apparent digestibility of TAA. MBM showed the lowest apparent digestibility of DM, CP, TAA, and EAA. CSM had the lowest apparent digestibility of GE. At 25℃, the apparent digestibility of DM, CP, GE, TAA, and EAA was approximately 33.65%–79.79%, 64.23%–96.53%, 58.17%–89.79%, 57.13%–97.4%, 49.03%–97.3%, and 56.85%–97.09%. SBM had the highest apparent digestibil-ity of CP, TAA, and EAA, FM had the highest apparent digestibility of all other nutritional compositions. The same result was found at 30℃. In addition, the apparent digestibility of DM, CP, TAA, EAA, and MBM was the lowest, while CSM had the lowest apparent digestibility of GE. Therefore, the apparent digestibility of the seven feed protein ingredients were all different at different temperatures in blunt snout bream. In other words, tempera-ture affected the apparent digestibility of feed protein ingredients. In conclusion, the apparent digestibility of ani-mal protein feedstuff was better than nonanimal protein feedstuff for blunt snout bream, perhaps because this is an herbivorous fish that can use plant proteins more efficiently. YEF showed the highest apparent digestibility of all ingredients at 30℃; therefore, it can be used as a high quality fish feed ingredient. However, the amino acid bal-ance of YEF was worse than FM, and should have methionine (Met) added to the feed, to enable the fish to use it better. Conversely, MBM had the lowest apparent digestibility, which may have been due to the numerous bones, which cannot be digested by fish, with the result that the nutriment of bone could not be used by blunt snout bream. Therefore, it should be used rarely in fish feed. At 25℃, the highest apparent digestibilities of all ingredients were in the FM and SBM, which can be used as high quality alternative protein sources for blunt snout bream. At 25℃, MBM was not a good feed ingredient. CSM showed the lowest apparent digestibility of GE under both tempera-tures, which may have been because CSM had a high level of cellulose, and the fish cannot process cellulose, so that this feed moved faster through the intestinal canal. The apparent digestibility of amino acids varied among different test ingredients, the same was found for single test ingredients. Overall, the apparent digestibility of DM, CP, GE, TAA, and EAA in FM, MBM, SBM, RSM, CSM, YEF, and PNM were different at different temperatures.关键词
团头鲂/蛋白源饲料原料/水温/表观消化率Key words
Megalobrama amblycephala/protein ingredient/temperature/apparent digestibility分类
农业科技引用本文复制引用
薛云飞,蒋广震,蔡万存,钱妤,刘文斌..两种水温条件下团头鲂对7种蛋白源饲料表观消化率的比较[J].中国水产科学,2018,25(1):86-96,11.基金项目
现代农业产业技术体系建设专项资金项目(CARS-45-14). （CARS-45-14）
