1, according to epidemic situation purchase
Before purchasing a sow, you must understand the epidemic situation and go to a place where there is no epidemic. If the number of pigs purchased is large, the pigs that are purchased must be isolated for about 45 days before they can be combined with the original pigs after they are confirmed to be free of disease.
2, according to the different size of purchase
Farmers raising a small amount of dual sows should choose big-earth-basic hybrid sows and Su Tai sows and Su Zhongzhong pigs with obvious estrus, easier breeding, and large-scale farms and large households with certain technical strength. Choose the sow dual sow.
3, according to the parents of the dual sow purchase
Before buying a biologist, make sure that the parents of the bisexual sow meet the requirements of the binary crossbreeding. If you are purchasing breeder pigs, your parents must be purebred breeder pigs. If you purchase Sutai pig, its parents must all be purebred Sutai pigs; if you purchase a binary hybrid sow, your mother must be excellent. In purebred local sows (such as Meishan sows), the father must be an excellent exotic breed (such as Drake), and it is best to use quality boars raised at the county improvement station. Some peasants saw the sow and stayed. It was wrong to keep sows who didn’t know their parents and how many generations of sows were left behind as a sow. This is because it is difficult for the sow to breed and breed. Commercial pigs have no heterosis and poor production performance. Therefore, it is best to purchase dual sows to the dual sow breeding farm determined by the County Animal Husbandry and Veterinary Station and obtain the dual sow certificate.
4. Purchase according to the main characteristics and reproductive characteristics of the dual sow.
The common feature of the binary soil sow is that it is larger than the native sow, but smaller than the adult sow; the back is flat, the abdomen is small, the hindquarters are full, and the limbs are strong. Different sows have different characteristics: the sow of the big sow has whole body white hair, about 105 days of puberty, and about 12 first-born calves; long-earth sow, Suzhong pig, white hair, and puberty 112 days or so, compared with the big earth sows, the lean meat percentage is high, the body type is slightly longer, the farrowing is slightly less, and the breeding is slightly more difficult; the Dutu binary sow and the Sutai pig have black hair, and the puberty is 120 Days or so. Mixed sows with mixed coat, abdomen, abdomen, hip, body length, standing difficulties, and moody, grumpy sows cannot be kept. The sow sows retained should also meet the following reproductive characteristics: (1) More than 7 pairs of effective nipples should be used, and the spacing should be reasonable. Pigs with sucking teats and even teat can not be preserved; (2) Mature and normal vulva development; (3) Early to early Love period, 8 months of age is not estrus to be eliminated; (4) strong lactation; (5) uniform size; and (6) post-weaning first-stage pregnancy ability.
5, according to health conditions to buy, sows to purchase a strong appetite, flexible movement, skin light Mao Jie, such as sluggish sow movement, hair volume, hair disorder or have skin dirt, eyelids, odors, etc. can not be purchased.
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