I. Main male and female sows in Jiangsu Province
1. Boars (1) Landrace boars: Meishan boars, Huaibei boars, and hog boars. (2) Exotic breed boars: Landrace boars (most used, male parent), Yorkshire boars (second, male parent), Duroc boars (minor, bisexual sow), Pietrain boars (Breeding two sows).
2. Sows (1) Landrace sows are represented by Meishan pigs, and the amount of farmed fish in Jiangsu Province is relatively high, which is a good first female parent. (2) Binary sow (50% external blood): Pimei binary cross sow (most cultivated in Rudong County, Jiangsu Province), Dubin binary cross sow. There are several cultivars, and their coat color and ancestry are more complex. Special attention should be paid to the use of free-living households. (3) Yang Binary sow: There are fewer sow sow in Jiangsu Province, and a certain number of farmers in Suiyang County. Compared with the local breeds and the sow of 50% external blood, the estrus is not obvious, and the amount of insemination and the number of insemination must be increased. The estrus identification, insemination, and pregnancy diagnosis are best supported by the presence of boars.
Second, the choice of boar semen
Farmers choose different varieties of boar semen insemination, we must pay attention to two issues: First, we must know the sow's species and the included blood, to avoid random messenger; Second, we must know the sow's father to avoid close relatives mating. Mainly refers to the pure breed of local breed boar, a small number, easy to mate with its daughter. Livestock husbandry departments must be unified and exchanged between artificial insemination stations to ensure that each boar can be used in the same area for no more than one year.
Puffed foods are mainly made of cereals, potatoes or beans, and are made of a bulking process such as baking, frying, microwave or extrusion. The structure has a certain degree of expansion and is crispy and vivid. Casual food with different styles.
Such as snow rice cake, potato chips, shrimp strips, shrimp slices, popcorn, rice crackers and so on.
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