Raising method for improving postweaning estrus of multipara sow
A technology of estrus rate and sow, which is applied in the field of livestock breeding, can solve problems such as reducing the mating rate, affecting the number of sows and litters in pig farms, and the economic loss of pig production
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[0023] That is, from the 1st day of lactation to the 8th day before weaning, the energy level of the normal diet was fed with a metabolizable energy of 13MJ / kg. The metabolizable energy of the diet energy level decreased to 10.4 MJ / kg on the 5th day and 9.1 MJ / kg on the 4th and 3rd day before weaning, and 9.1 MJ / kg from the 2nd day before weaning On the second day after weaning, the energy level of the diet was reduced to 7.8 MJ / kg, and the energy level of the diet was restored to 13 MJ / kg on the third day after weaning. The feeding amount of multiparous sows during lactation is 1.5kg+0.5kg×number of piglets, and other nutritional levels per kilogram of rations during lactation for multiparous sows (refer to the nutritional requirements of NRC pigs in the United States (1998)) are shown in Table 1.
[0024] Implementation effect: see figure 2 .
[0025] With the feeding method of the present invention, estrus can occur on the 3rd day after weaning of sows, the estrus rate c...
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