The present invention relates to a pig farming technique (飼養技法) and a low-concentration phenylalanine feed. Pig farming technique according to the present invention is to feed water by adding 2-3g of legal sulfur to magnetized water for the latter period (18-19 weeks. 85±3kg ~ 24-25 weeks. 120±3kg) based on the amount of drinking water per head per day. It is characterized by maximizing the quality of pork by drinking it, and suppressing the occurrence of PHIP by feeding it as a phenylalanine-reduced feed for 3 to 7 days before shipping and then shipping. As such, the present invention maximizes the absorption rate of legal sulfur in the body by adding and melting legal sulfur (head sugar: 2 to 3 g) in magnetized water to make pigs drink it, thereby improving meat quality such as pork odor, meat color, juicyness, and soft meat taste, and The effect of reducing odor-causing gases in the breeding field can be obtained. In addition, by feeding a phenylalanine-reduced feed for a maximum of 7 days and at least 3 days before shipment, pork with a reduced free phenylalanine concentration that can suppress the occurrence of PhIP is produced. It can be reduced, and accordingly, there is an effect of suppressing the occurrence of cancer, which is a factor of PhIP.
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