In general, controlling the quality of compound feeds includes three main aspects:
Control of a feed ingredient:
Raw materials are a key factor affecting feed quality. If the farmers use concentrated concentrate, they should purchase corn and bran. Corn should not be mildewed, and the moisture content should not exceed 14.5%. The bran is best to be directly from the flour mill. If it passes through the intermediate channel, it may be mixed with clam shell powder. If the household uses premix, it will also purchase raw materials such as protein, calcium, phosphorus and salt. When buying soymeal, pay attention to the scale of the manufacturer and the temperature control during processing. When the temperature is too high, the soybean meal is brown, and when it is too low, it is white. When the temperature control is unstable, the soybean meal is raw and cooked. Overripe soybean meal, its protein denaturation, utilization rate is only about 70% of normal, raw soybean meal is not destroyed due to trypsin inhibitor, resulting in protein digestion barrier, causing pig diarrhea. Because the price of fishmeal is relatively expensive, there are often unscrupulous traders who are adulterating them. Good imported Peruvian fishmeal should have a protein content of more than 62%.
Control of the two feed formula:
The breeder should try to use the recommended formula of the feed manufacturer. However, if the local has more abundant and cheap raw materials, the formulator of the feed manufacturer can make the recommended formula separately, and avoid adding it at will. Generally speaking, in the fattening stage of pigs, if the breeder pursues a high lean rate, the amount of bran added can be slightly larger, and the amount of large pig can reach 25%; if the growth rate is pursued, the bran can be used. The amount of addition is controlled at 15%~18%. The purpose pursued by the breeder is different and the formula used should be slightly different. Once the formula is determined, do not change it frequently. If the high-priced raw materials are continuously replaced with cheap raw materials, the production performance of the pigs will be greatly affected.
Three process control:
Conditional breeders can use concentrates to formulate full-price feed. It should be noted that the weighing must be accurate and the mixing time must be sufficient. The order of addition of raw materials should follow the principle of being large to small. When hand-mixing, first pour a layer of corn flour, then pour a layer of concentrated material, then pour a layer of bran, and finally turn back and forth several times until uniform. Mixing evenly is an important factor to ensure the feeding effect, and must not be ignored.
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