Clever bad residue can save money
Health Food,Wholsale Prickly Pear Melon,Best Organic Red Ginseng,White kidney bean drink Jilin Manyitang Pharmaceutical Co., Ltd , https://www.likangpharmaceutical.com
July 17 14:05:21, 2025
The use of bad residue as a partial replacement for compound feed in pig farming can significantly lower feeding costs. However, excessive amounts of such residue may negatively impact weight gain, feed conversion efficiency, and increase the time required for slaughter. The challenge lies in incorporating a high percentage of bad residue—such as 50% bad residue mixed with 50% compound feed—without compromising the pigs' overall performance. To address this, we applied various scientific methods to optimize the use of these by-products. As a result, pigs fed with this mixture gained 5% more weight compared to those on conventional diets, while reducing feed costs by 17% to 25 per kilogram.
When selling pigs at 7 to 8 yuan per kilogram, this feeding method proved more profitable, yielding 70 to 90 yuan per pig. There was no significant difference in slaughter rate or lean meat ratio. Based on nutritional requirements during the growing phase (20 kg to 60 kg) and finishing phase (60 kg to 90 kg), six types of bad residue were selected: tofu residue, beer residue, corn waste from starch and sugar production, and alcohol distillers’ grains. During the growing period, the combination of residues reached up to 50% and 68%, resulting in daily gains of 100% and 97% of the conventional feed level, with feed cost reductions of 13% and 18%, respectively. In the finishing phase, residue levels reached 58% and 80%, leading to daily gains of 128% and 116% of the conventional diet, with feed cost savings of 23% and 25%.
It is important to manage the amount and feeding method of bad residue properly. According to test results, tofu residue can be included up to 25%, but it must be cooked for 10–15 minutes or at least rinsed with boiling water before feeding. Beer residue or sugar-based waste can be dried or used directly, with inclusion rates exceeding 30%. Alcohol dregs, however, should not be fed in large quantities; 8–15% is considered appropriate. Sauce residue and other similar materials contain high salt and antibiotic levels, so their inclusion should be limited to around 5%.
Feeding pigs with bad residue requires careful consideration. First, the best protein source among bad residues is corn scraps from starch or sugar production. Second, when mixing various residues, they should be combined with part of the conventional feed, maintaining a material-to-water ratio of 1:2 to 1:2.5. Avoid feeding frozen or spoiled residues. Third, the high crude fiber content in some residues can reduce digestibility, so it's important to minimize total fiber in the diet. Lastly, when using more than 50% of certain residues, the diet becomes too acidic, which can disrupt normal physiological functions in pigs. Adding physiological alkaline agents can help achieve optimal weight gain.
We recommend the following formulas for growing and finishing pigs. For growing pigs: 25% tofu residue, 12.5% starch residue or corn waste, 12.5% alcohol distillers’ grains, and 50% commercial feed. For finishing pigs: 4% soybean meal, 44% corn, 15% tofu residue, 12% beer residue, 18% starch or corn waste, 5% soy sauce, and 2% bone meal. Both formulas require additional trace elements and vitamins to ensure balanced nutrition.