Fish meal sold by unscrupulous merchants is generally adulterated. At present, the common dopants in fish meal are wheat bran, urea, sediment, peanut shell, rapeseed meal, cotton meal, rice husk and so on. According to the difference of adulteration, there are six common inspection methods, which chicken farmers can learn about. Look carefully when buying fishmeal, and look at the color of fishmeal. Under normal circumstances, fish meal should be brown and the particle size is relatively uniform. If there are uneven colors and different particle sizes, such as brown, gray and white particles, it is proved that there is a greater possibility of adulteration.
In addition, if the fish meal is caked, it proves to be rancid. Fish meal with normal friction should be rubbed softly. If it feels rough when rubbed by hand, it must be adulterated. Sometimes, fish meal feels sticky with your hands, which proves that it has gone bad. Smell that cottonseed smells like cottonseed, and rapeseed smells like rapeseed. Smell fishmeal. If there are other flavors, it proves adulteration. Under normal circumstances, fish meal tastes fishy and salty. Soak some fish meal in water and stir. Generally, the ratio of fish meal to water is 1:5. Leave it for a while and see if it is adulterated.
Things like peanut shells and rice husks mentioned above will float, and things like sediment will sink to the bottom. Combustion According to the characteristic that litmus paper turns blue when it burns with plant substances, some fish meal is ignited with litmus paper for testing. If it turns blue, it proves that the fish meal is mixed with plant substances. They are usually taken to the laboratory for microscopic examination. Ordinary chicken farmers can't do this, but with the above five methods, most adulterated fish meal can be basically identified. The above are six methods to detect the quality of fish meal, hoping to help chicken farmers.