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Abstract Dietary fiber (DF) is an essential nutrient in sow diet. It can increase sow satiety and prevent constipation. It can also regulate sow gut microbiota, and the interaction between the two can regulate sows' reproductive performance and metabolic function and the growth performance of offspring piglets. It can be seen that the benefits of DF in sow production are inseparable from the interaction of gut microbiota. This paper reviewed the effects of DF on the diversity of sows' gut microbiota, and the effects of DF-gut microbiota interaction on sows' gut microbiota, metabolism, ovulation and lactation, as well as on offspring production performance, aiming to provide a new strategy for the application and research in sow diet.
Key words Dietary filier; Gut microbiota; Sow; Reproductive performance; Offspring piglets
Feeding restriction during pregnancy can ensure normal fat and reproductive performance, but excessive feeding restriction will also make sows hungry, causing abnormal behaviors such as constant chewing, frequent bed climbing and bed lying of cows, which will have a negative impact on reproductive performance. Moreover, sows' feed intake during pregnancy is closely related to that during lactation, and excessive feeding restriction during pregnancy will lead to a decrease in feed intake during lactation[1]. Dietary fiber (DF) supplementation in the diet can increase sows' satiety, and DF is not easy to digest in the digestive tract, thus avoiding excessive energy intake of sovs affecting reproductive performance[2].
DF can not only increase sows' satiety, but also improve sovs' reproductive performance and lactation performance. Sows' physiological metabolism during pregnancy will undergo complex changes , and the stability of gut microbiota will become fragile[3]. Once the stability of gut microbiota is unbalanced, it will lead to intestinal epithelial cell damage and intestinal inflammation. Once the stability of intestinal microfloras is unbalanced, it will lead to intestinal epithelial cell damage and intestinal inflammation. Gut microbiota is very sensitive to specific DF. Studies have shown that adding DF to the diet during pregnancy can effectively improve the relative abundance and diversity of sows' gut microbiota, and the interaction between the two can affect sows' nutrition, physiology and immune process[5-6]. It can be seen that the benefits of DF on sow production are all inseparable from the interaction with gut microbiota. This paper...