Consortium on Health, Environment, Education, and Research (CHEER), and Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong, China; Department of Science, School of Science and Technology, The Open University of Hong Kong, Hong Kong, China.
Consortium on Health, Environment, Education, and Research (CHEER), and Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong, China.
Sci Total Environ. 2020 Feb 20;704:135266. doi: 10.1016/j.scitotenv.2019.135266. Epub 2019 Nov 23.
The present study aimed to formulate diets using soybean dreg to replace part of fish meal (30% and 60%) and to incorporate dietary supplement to the diets with papain to promote fish growth and decrease total cost of feed formulations for gold-lined seabream (Rhabdosargus sarba). In Experiment 1, papain was used to supplement feeds containing soybean dreg to replace part of the fish meal. In Experiment 2, bromelain and a microalgae supplement were used to supplement feeds containing soybean substitutes as a replacement of the fish meal. Results from Experiment 1 indicated that the growth performance of fish fed diets with up to 60% replacement of fishmeal with soybean residues predigested with papain were not significantly different (p > 0.05) from the control (a formula developed by Agriculture, Fisheries and Conservation Department (AFCD), which contained 49.4% fishmeal, 45.2% raw trashfish, 4.9% alpha starch and 0.5% vitamin premix). It indicated that plant protein predigested with a small amount of enzyme supplement (e.g. papain) can be used to replace fish meal in traditional fish diets, and the cost could subsequebtly be reduced. In Experiment 2, the diets containing bromelain, soybean dreg pre-digested with bromelain and supplemented with microalgae resulted in significantly better growth performance than other diet groups. Results from the present study suggested that predigesting soybean dreg with enzymes could replace up to 60% fishmeal in the moist pellets while achieving economic benefits.
本研究旨在利用豆渣替代部分鱼粉（30%和 60%）来配制饲料，并在饲料中添加木瓜蛋白酶的膳食补充剂，以促进金鲷的生长并降低饲料配方的总成本。在实验 1 中，使用木瓜蛋白酶来补充含有豆渣的饲料，以替代部分鱼粉。在实验 2 中，使用菠萝蛋白酶和微藻补充剂来补充含有豆粕替代品的饲料，以替代鱼粉。实验 1 的结果表明，用经过木瓜蛋白酶预处理的豆渣替代高达 60%的鱼粉的饲料喂养的鱼的生长性能与对照组（由农业、渔业和自然保护署（AFCD）开发的配方，含有 49.4%的鱼粉、45.2%的生杂鱼、4.9%的α淀粉和 0.5%的维生素预混料）没有显著差异（p>0.05）。这表明，用少量酶补充剂（如木瓜蛋白酶）预处理的植物蛋白可以替代传统鱼饲料中的鱼粉，而且成本可以随后降低。在实验 2 中，含有菠萝蛋白酶、用菠萝蛋白酶预处理的豆渣和补充微藻的饲料的生长性能明显优于其他饲料组。本研究结果表明，在潮湿颗粒中用酶预先消化豆渣可以替代高达 60%的鱼粉，同时实现经济效益。
