Effects of insoluble per soluble dietary fiber ratio in weaned pig diet on visceral organ weight and gut morphology นุจริา ทกัษิณานันต์

Insoluble dietary fiber (iDF) has many physiological effects on the digestive system. This study aims to investigate effects of the ratio of insoluble per soluble dietary fiber (iDF:sDF ratio) in weaning pig diet on digestive tract development. Total 64 crossbred pigs, weaned at 21±3 days with initial weight about 6±0.5 kg, were randomized to feed four experimental diets: control diet (CON), and 3 differences iDF:sDF ratio: 4±0.5 (R4), 5±0.5 (R5) and 6±0.5 (R6), respectively. All diets were cornbroken rice-soybean meal based diets. The visceral organ weight and gut morphology were collected at 29 days after weaning. The result show increasing iDF:sDF ratio was decreased small intestine weight significantly (P=0.025) and numerically increased large intestine weight (P=0.850) while the weight of stomach was not changed (P=0.214). The duodenal villus height trended to decrease that cause of lower the villus height per crypt depth ratio (VH:CD ratio) in the pig fed R5 and R6 diets (P=0.214). In jejunum, pig fed high iDF:sDF ratio tended to increase villus height. However, the pigs fed R6 diet had greater VH:CD ratio than the others (P=0.004) due to high villus height and less crypt depth. In summary, the increasing of iDF:sDF ratio had negative effect of small intestine weight and decreased the VH:CD ratio in duodenum and jejunum in small intestine.