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The rapeseed cake and cottonseed cake are commonly used as protein sources in animal feed, but they contain natural toxins that can be harmful to livestock and poultry. For example, rapeseed cake contains compounds such as glucosinolates, tannins, and mustard enzymes, which can lead to health issues like heart fat accumulation, impaired growth, goiter enlargement, and reduced nutrient absorption. Similarly, cottonseed cake contains free gossypol, a toxic compound that can negatively affect the growth rate of pigs and, in severe cases, cause poisoning or even death.
To make these by-products safe for use in feed, microbial fermentation is an effective solution. By using functional microorganisms found in products like Kinpo II Fermentation Auxiliaries, the harmful substances in rapeseed and cottonseed cakes can be broken down and removed. This not only improves the safety of the feed but also allows for their use as substitutes for soybean meal, reducing dependency on more expensive ingredients.
The fermented feed made with Kinpo II is ideal for pigs and chickens. It can completely replace soybean meal and reduce corn usage by up to 50%, cutting feed costs significantly. The process involves mixing corn flour, wheat bran, rice bran, and rapeseed or cottonseed cake powder in a ratio of 20:30:10:40. Then, add 0.2% of the Kinpo II starter culture, mix thoroughly, and add water until the moisture content reaches around 65%. Place the mixture in sealed containers like jars or plastic bags and let it ferment for two to three days. When the mixture develops a sweet, fermented aroma, it's ready to be fed.
This fermented feed can gradually replace up to 40–50% of the regular feed, leading to substantial cost savings without compromising the nutritional value for animals. It’s a sustainable and economical option that promotes better digestion and overall health in livestock.