In the past decade, the United States has undergone tremendous changes in sow breeding, weaning pig management and feeding technology. At present, the following practices are prevalent in the US pig industry. 1. Individual weaning means that the heavier piglets in the nest are weaned 2-3 days in advance, so that smaller piglets have the opportunity to eat more breast milk, thus achieving a larger weaning weight. According to the study, piglets weighing more than 6.5 kg at weaning can reach market weight 7 days earlier than those with weaning weight less than 5 kg. 2. The one-on-one feeding method transfers the weaned piglet directly from the sow house to the finishing house and raises it to reach the market weight. This reduces the traditional link from the sow house to the nursery house and avoids some of the stress reactions that result from this. The main advantages of this method are faster weight gain and lower labor and transportation costs. 3. Weaned Piglet Isolation and Feeding Weaning is carried out at 1-2 weeks of age, and weaned piglets are kept in nursery pigs far from the sow farm in order to reduce the vertical transmission of certain diseases from sows to piglets. Isolation and feeding increases the number of litters per sow per year, the number of litters per year in each farrowing pen, but may reduce the number of litters and litter size in the next litter. 4. Cooperative sow farms This practice involves a single sow farm with 1200-1600 sows on several growing farms. Generally there are 8 shareholders in each sow farm. Each shareholder will receive all weaned piglets produced by the sow farm within a week. When these pigs leave the nursery, the growing farm receives another batch of all piglets produced in one week from the sow farm. The cooperative sow farm is an important part of the all-in, all-out growing pig farm. And all-in and all-out type is replacing more and more pig farms in an uninterrupted manner. This approach is conducive to improving the management efficiency and implementing more thorough cleaning and disinfection between the two batches of pigs. 5. The sow's stage feeding method In the first few weeks of lactation, the sow's backfat can be reduced by 30%. In order for the sow to return to estrus, the nutrient reserve must be quickly rebuilt. The sow stage feeding method includes at least 4 types of feed: post-lactation material, pre-match material, post-match material, and post-pregnancy material. Increasing the intake of 1.256 MJ/day of energy feed after weaning increases the number of litters by about one. The added energy must be in the form of starch. Glucose produced from starch stimulates ovulation. Organic trace elements are also conducive to recovery of trace element reserves in sows. 6. Environmental control The environmental problems caused by pig farming are mainly odors. Measures to control odors include installing expensive sewage treatment facilities, changing the content of protein and minerals in feed, adding additives such as Yucca phytosterols or enzymes to feeds, and so on. Many pig farms take legal and moral responsibility for environmental protection. China Agricultural Network Editor
Yeast Feed Additives
Supply Soyabean Meal,Supply Wheat Gluten Meal,Fish Oil For Animal
Wudi Deda Agriculture Co., Limited , http://www.challmeal.com