Effects Of Different Forms(Pellet Vs Meal) And States(Liquid Vs Solid) Of Diet On Performance And Digestive System Development Of Early-weaned Pigs

Two trials were conducted to investigate the effeets of dilfferenl forms of diet(pelle( vs meal) and states of diet(liquid vs solid) on growth performance and digestive system development of early-weaned pigs.In trial 1, piglets(n-96, 21+ 1d old) wore allotted to one of four treatments in a 2X2 factorial arrangement to examine the effect of diet form and slate on performance during 21d after weaning. There were six replicates with four pigs per replicate in one treatment. Liquid feed were made by dry pellets or meal mixed with water(initial temperature: 70-80℃) in the ratio 1:2.5. Food intake, daily gain and diarrhea were recorded. Starch gelatini/.ed degree, feed pH and xylose absorption were also determined.The results showed that:1. Pelleting the diets resulted in 9.7% greater ADG(p<0.05) and 13.5% greater ADFI(p<0.10) ,with comparing to meal. Pelleting increased degree of starch gelatinizing by 15-16%.2. Fluidifying the diets resulted in 12.9% greater Al)(i(p 0.05) and 10.3% greater ADFI(p<0.05) ,with comparing to solid. Pigs fed liquid diets had higher xylose absorption than solid by 52%(p<0.05). Liquid diets can reduce diarrhea of piglels(p<0.05)In trial 2, piglets(n=20, 21 + 1d old) were allotted to one of four treatments in a 2X2 factorial arrangement to examine the effects of diet form and state on performance and digestive system development during J4d after weaning. There were five replicates with one pig per replicate in one treatment. Liquid feed were made by dry pellets or meal mixed with water(initial temperature:70-80℃) in the ratio 1:2.5. Food intake, daily gain and diarrhea were recorded. The digestibilities of DM and CP were determined. Four piglets from each treatment were slaughtered at d. 15 Effects of diet form and state on the development of gut. alimentary tract pH value, villus structure of small intestines, intestinal trypsinase andamylase were also determined. The results showed that:1. ADG of pigs fed pellets was greater than meal by 48.3%(p<0.05). ADl'l by 20.2%( p<0.10), and F/G was lower than meal(p<0.05). Pelleting increased DM digestibility by 3.0%(p<0.05). The activity of small intestinal trypsinase was increased by pelleting(p<0.05). Moreover, pelleting increased relative weight of liver(p<0.05) and increased height of small intestinal villus(p<0.10).2. ADFI of pigs fed liquid diets was greater than solid by 10.3%(p<0.05). Liquid diets can reduce diarrhea of piglets(p<0.()5). Fluidifying increased CP digestibility by 7.0%(p<0.05).Moreover, Fluidifying increased height of small intestinal villus(p<0,10).Based on this study, it is suggested that pelleting or fluidifying of diet can increase growth performance and digestive system development of early-weaned pigs. Moreover, the nutritional and physiological effects of liquid on early-weaned pigs were displayed during the 2 weeks after weaning.