How to identify the authenticity of feed ingredients
Release time:
Jun 14,2018
Due to the large increase in the price of feed raw materials in recent time, there are adulteration inclusions in feed raw materials, and the adulteration techniques are renovated, making it difficult to identify the quality of raw materials, resulting in high feed intake and small egg weight of chickens on the market, affecting production performance.
In order to control the quality of feed, the quality of raw materials must be well controlled. Now several common adulteration methods and identification methods of raw materials are introduced as follows: bran is the most commonly used raw material, but the adulteration phenomenon is also relatively serious, often mixed with talcum powder, rice bran, etc., the identification of this situation can be manually inserted into the bran and extracted. If there is white powder on the hand and it is not easy to shake, it is proved to be mixed with talcum powder, it is easy to shake off the residual flour, and then grasp the bran with your hand. If the bran is pure bran in a mass and the hand feels swollen when holding, it is mixed with rice bran. If it feels slippery when rubbing on the palm of the hand, it is talcum powder. In addition, detection of crude ash and crude protein can also be determined. Because the adulterant crude ash is high, crude protein is not enough.
For the adulteration of cottonseed meal and rapeseed meal, it can be carefully identified by eye. If necessary, a magnifying glass is prepared to identify the feed raw materials under the magnifying glass, especially for those with smaller particles at the bottom. Now, pigment is added to the different colors of cottonseed meal and rapeseed meal, and then dried to make grains with a particle size smaller than that of rice grains. In this way, the color of bran with rice husk and this small grain is very similar to cottonseed meal. Generally, it is not easy to see it without looking carefully. However, if you look carefully at the fine parts, you can see the suspicious particle size and rub it with your hands to make it into powder, which proves that it.
The adulteration of soybean meal is more difficult to see. For example, if non-protein nitrogen such as urea is mixed, it can be eliminated by measuring true protein. Corncob and stone powder are added with protein essence (urea-formaldehyde polymer) and matched with color to make grains, then pressed into pieces and mixed into soybean meal. This small piece is very similar to soybean meal pieces, and it is not easy to detect without carefully checking the edges. However, calcium and phosphorus content can be measured, calculating the proportion of calcium and phosphorus, and measuring the crude ash can be found to be false.
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