Why does the effect of sweet potato as animal feed improve after fermentation?
First, it's important to understand that fermenting sweet potatoes is not the same as simply using them as feed. During the harvest season, traditional methods of feeding raw sweet potatoes directly to livestock often result in low nutrient absorption and reduced economic value. Is there a more efficient and scientific way to maximize the nutritional and economic potential of sweet potatoes? The answer is definitely yes.
Sweet potatoes, also known as yams, are a rich source of energy and water, containing about 1,270 kcal per kilogram, along with 700 grams of water, 220 grams of starch, 23 grams of protein, 29 grams of sugar, 2 grams of fat, 200 mg of phosphorus, 180 mg of calcium, 4 grams of iron, 1 mg of carotene, and various vitamins like B1, B2, C, and nicotinic acid. They are widely grown across China, especially in Sichuan, Yunnan, Hunan, and Guizhou, where they are commonly used as pig feed. However, traditional feeding methods involve cooking the sweet potatoes, which destroys many essential nutrients and leads to imbalanced diets. This can cause issues such as poor digestion, bloating, loss of appetite, and even lower milk production in sows or weaker growth in piglets.
To address these challenges, sweet potatoes should be fermented before being fed to animals. Fermentation enhances their nutritional profile, improves digestibility, and increases overall feed efficiency. A specialized product called Jinbao Sweet Potato Feed Fermenting Agent has been developed for this purpose. It contains high concentrations of beneficial microbes like Bacillus, lactic acid bacteria, yeast, and filamentous fungi, with over 1 billion live bacteria per gram. This microbial blend helps break down complex plant materials, making nutrients more accessible to animals.
After fermentation, pigs gain weight faster, and weaned piglets can reach 100 kg in just four months, with daily gains of up to 0.75 kg. The feed conversion ratio improves significantly, and sow fertility rates can increase by over 30%. Additionally, fermented sweet potatoes are easier to store, last longer, and reduce the need for cooking, saving both time and fuel.
The benefits of fermentation extend beyond nutrition. It enhances feed palatability, reduces toxins, boosts immunity, and improves overall animal health. By breaking down tough cell walls and converting complex carbohydrates into simpler forms, fermentation makes the nutrients in sweet potatoes more bioavailable. This not only increases digestibility but also supports better growth and development in livestock.
To achieve the best results, proper preparation is essential. The sweet potatoes should be washed, crushed, and mixed with other ingredients depending on the type of animal. Moisture levels should be adjusted to around 65-75%, and the temperature during fermentation should be kept between 15-20°C. The mixture must be sealed tightly and left to ferment for 1-3 days. Once ready, the fermented feed can be stored for several months without losing quality.
When using fermented sweet potato feed, it’s important to maintain hygiene, avoid contamination, and use fresh, non-spoiled materials. Adding small amounts of corn flour or bran can also enhance the fermentation process. Whether used directly or mixed with other feeds, fermented sweet potatoes offer a sustainable, cost-effective, and highly nutritious option for livestock farming.
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