introduction
Sow protein and amino acid nutrition has always been a hot topic in pig nutrition research. In addition to meeting their own maintenance needs, lactating sows must also meet the milk production needs to ensure the growth of piglets. In addition, sows have enhanced body storage capacity during lactation, and their protein and amino acid needs are different for different body loss. The above points indicate that lactating sow protein and amino acid nutrition have their special patterns. In recent years, research on the protein and amino acid nutrition of lactating sows has been deepened, which has greatly improved the production level of lactating sows and promoted the development of sow nutrition research.
1 Lactating sow essential and non-essential amino acids
1.1 Essential amino acids
Due to its special physiological characteristics, lactating sows must have different types of amino acids than fattening pigs. At present, most of the essential amino acids studied include lysine, threonine, valine, leucine and isoleucine.
1.2 Non-essential amino acids
It is generally believed that non-essential amino acids can be synthesized in vivo to meet the needs of animals. Some studies have found that the addition of non-essential amino acids such as arginine, cysteine ​​and glutamine has a special physiological effect on lactating sows.
2 Proportion of suitable amino acids in lactating sows
Lactating sows have their specific amino acid restriction sequence. Lysine, threonine and proline are the three major limiting amino acids, which are different from the lysine, methionine, threonine and tryptophan of fattening pigs. The restrictive order of threonine and proline has been a hot topic of research. In recent years, researchers have conducted in-depth research on the amino acid restriction sequence of lactating sows, and found that the weight loss in lactation is different, and the required amino acid restriction order is also different.
3 lactating sow protein and amino acid requirements
In recent years, research on the protein and amino acid requirements of lactating sows has been very different from the past. As the sow breeds improve and productivity levels increase, so does the nutritional needs. To be sure, higher levels of production necessarily require higher nutrition.
3.1 Maintaining needs
With the improvement of the variety, the productivity of the sow has been greatly improved, but the recitation is thinner than before, and there is a contradiction between the reduction of body fat and the improvement of productivity. In order to maintain the development of sows' own tissues and to exert high productivity, the maintenance of protein and amino acids needs to be improved compared with the past varieties.
3.2 Breast development and milk production needs
High levels of amino acids are required for lactation milk production and breast tissue development. Good lactation and adequate milk production are prerequisites for fast growth of piglets, so it is especially important to provide sufficient protein and amino acids to ensure breast development and milk production.
3.3 Protein and amino acid needs for different body weight loss during lactation
At present, the high-level pig production in foreign countries has been able to maintain the sow body condition during lactation, so that the sow does not suffer weight loss. However, the level of pig production in China is relatively backward, and the weight loss during lactation is generally around 10 kg. The amount of protein and amino acid required varies depending on the degree of body loss.
Emergency Downlight,Led Emergency Downlight,Led Downlight With Battery Backup,Downlight Emergency
NINGBO JIMING ELECTRIC APPLIANCE CO., LTD. , https://www.jimingemergencylight.com