Under the condition of artificial feeding, sexual maturity begins at the age of 4-5 months, and the weight is above lkg. After 6 months, it will breed, generally more than 10 head per year. The weight of young rats can reach 0.5 kg in 3 months, above 1kg in 5 months, and the maximum is 2-3kg.
Vacant rooms, cellars and air-raid shelters can all be used for breeding, or they can be made into a brick enclosure of1.2x1.0x0.8m, which is divided into two rooms, with openings left in the partition wall, one as an inner room and the other as a breeding farm. 5 pairs per square meter, which can be raised in groups or in cages.
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