SOLUTIONS TO PRODUCTIVITY CHALLENGES
Posted in: Pork Insight Articles, Production by admin on May 12, 2017
Enhancing reproductive performance of the breeding herd is a daily challenge. Today’s sows and gilts are expected to farrow and wean a large number of pigs per litter and have a large accumulated number of pigs weaned per sow per year. Caretakers need to continuously be alert and look for major and minor problems that can affect reproductive performance. Although numerous factors can influence reproductive performance, this paper only deals with some of the factors affecting preweaning survival and growth rate, such as: managing colostrum intake, effect of colostrum intake on growth rate, managing mammary gland development, identification and management of non-functional mammary glands, effect of litter size on growth rate, and use of creep feed to improve the adaptation of weaned pigs to solid feed.
In general terms, piglets that died before weaning have difficulty taking their first breath after birth, lower birth weight, lower colostrum intake, lower weight gain during the first 24 hours after birth, lower rectal temperature, higher plasma cortisol concentration, lower plasma IgG and glucose concentrations at 24 hours after birth than piglets still alive at weaning. Numerous factors influence the amount of colostrum available per piglet, such as: 1) a short period of time (24 hours) when colostrum is available; 2) competition among piglets due to differences in body size, vitality, and number of piglets per litter; 3) the effect of birth order on amount of time available for piglets to consume colostrum; 4) colostrum is more abundantly secreted in the early phase of the colostrum period; 5) colostrum composition changes dramatically within the colostrum period, and (6) missing nursing bouts during first 24 hours of life. It is absolutely essential that ALL piglets receive their fair share of colostrum to enhance their chance for survival. The production of colostrum does not increase with litter size. Individual colostrum intake during the first 24 h after birth averages 250-300 g/d.