The sow's productivity is represented by the number of litters per year and the average number of weaned piglets per litter. The length of the sow's reproductive cycle determines the number of litters per year, and the number of litter-born pigs and pre-weaning mortality determine the number of weaned litters. Raising the productivity of sows is mainly to increase the reproductive cycle of sows and the number of weaned live piglets. Select excellent pig breeds In industrial pig production, most of the mothers of commercial pigs use hybrid sows, because the hybrid sows have heterosis in reproductive performance and are suitable for the market demand for lean pigs. When selecting a stocking gilt for growth, the sows should be flat or slightly inclined, the abdomen is relatively large and loose, and the sows whose abdomen is excessively constricted have poor fertility. The nipples are arranged neatly and evenly, generally more than 7 pairs, and the nipples are full. There can be no steamed bread, no nipples, etc. The genitalia is moderate in size, sagging, and the sow's upturned sows are generally poor in reproductive performance, and often have sympathetic or non-pregnant phenomena. The maternal reproductive performance is better if it is not fat, nor normal, and sows with too high lean meat have poor reproductive performance. In the three-way hybrid system, no lean meat percentage is required for the female parent. Timely breeding Grow or mature gilts generally have a body weight of 110-115 kilograms, which is higher or lower than the body weight. The interval between gilts with apparent estrus and ovulation is generally 36-40 hours, the parity of sows is 38-44 hours, and the average time for ovulation is 2-7 hours. Therefore, the first time from 8-12 hours after the start of estrus. The compounding at 12 hours intervals can achieve good results. Sows with indistinct estrus need to be reconstituted twice. After sows are weaned, they are usually estrus within 3-10 days. Sows after pregnancy have to control the amount of feeding. Maintaining a moderate amount of feed can increase litter size. Eliminating Poor Breeding Performance Under normal production conditions, some sows do not have estrus for a long period of time or frequent regrowth. Sows who use drugs for aphrodisiac and improve feeding management or return more than 3 times should be eliminated in time. Sows generally have the highest number of 3-6 litters and are reduced to 9-10 fetuses, with significant deviations in performance. This sow should be eliminated in time. Poor nursing performance or postpartum sow-free sows should be documented and should be phased out if similar conditions occur in the future. Control the amount of feed The sow should control the amount of feed after pregnancy, generally feeding 1.6-1.8 kg per day within 30 days of pregnancy, 2.1-2.3 kg per day for 30-60 days, and 2.5-2.8 kg per day for 60-108 days. 7 days gradually reduced until 1.2 kilograms per day, for individual thin, partial sows should be appropriately reduced material, the standard status of pregnant sows is the upper middle. For pregnant sows raised in large groups on the same column, midwives should not be co-opted to avoid crowding and fighting, and disinfection must be done to eliminate epidemics. Isolation Gown,Non-Woven Isolation Gown,Disposable Isolation Gown,Medical Isolation Gown Luck Medical Consumables Co.,LIMITED , https://www.luckmedical.com