Abstract : 64 pigs of weaned pigs with large weaning and healthy weight and average body weight of about 7Kg at the age of 28 days were randomly divided into 4 treatments according to gender and body weight, 4 replicates per treatment, 4 replicates per treatment. Pigs (half male and female) conducted two trials for 35 days to study the production performance and digestion of weaned piglets by adding different types (microcapsules and common) complex acidifiers in corn-soybean-puffed soybean-based diets. The impact of the channel function. The test results show that: (1) Overall: the addition of the coating acidifier "Li Bian" can increase the daily weight gain of weaned piglets, improve feed utilization efficiency, reduce diarrhea rate, increase the relative weight and relative length of digestive organs, and reduce pH of the contents of the gastrointestinal tract, increase the number of lactobacilli in the intestine, reduce the number of E. coli; lighten the crypt, increase the height of the villi; increase the activity of sucrase and lactase in the intestine; increase the intestinal mucosal antibody SIgA The amount of secretion. In the early stage, the addition of “Li Bian†0.1%, and the later addition of “Li Bian†0.05% of the test group was 0.05% higher than the previous period of “Li Bianâ€, and the later test group with “Li Bian†0.03% was better. In comparison, the average daily gains were increased by 5.83% and 3.71%, and the average weight-to-weight ratio was 13.1% and 1.61%, respectively, and the diarrhea rate was reduced by 3.39%. The above results show that compared with common acidifiers, microcapsule complex acid preparation can improve the intestinal health and growth performance of weaned piglets.
Key words : microcapsule complex acid preparation; weaned piglets; growth performance; diarrhea rate; digestive tract
Newborn piglets have a fast growth rate, high metabolic intensity, and a large demand for nutrients (Stoll et al., 2000). However, early weaning in production, damage to the secretion, digestion and absorption of the intestines, combined with the early development of the digestive system of piglets, the growth of piglets is also affected by the phase and long-term effects.
Intestinal development of piglets involves the development of intestinal cells and tissues themselves and the development of microflora in the gut. Colonization of beneficial bacteria in the gut is the key to intestinal health. It is worth noting that the colonization of beneficial bacteria requires a slightly acidic environment, and lactic acid from lactose fermentation in breast milk can create a beneficial environment for intestinal development in suckling piglets (Mahan et al., 2004), but with early weaning and dietary replacement. Environmental stress, elevated pH in the intestine (Risley et al., 1992) adversely affects intestinal health in weaned piglets. In order to solve this problem, an acidulant is usually added to the diet to improve the intestinal health and growth performance of the animal. However, short-chain organic acids absorb quickly in the stomach and duodenum (Piva et al., 2007). It is difficult to reach the intestines to support beneficial bacteria and inhibit harmful bacteria.
The microcapsule treatment of the organic acid can prevent the organic acid from being neutralized by the alkaline raw material in the feed raw material, and at the same time let the organic acid reach the hindgut, and support the beneficial bacteria and inhibit the harmful bacteria. Therefore, this experiment by adding microcapsule complex acidifier "Li Bian" in the basal diet, observe its performance on weaned piglets, diarrhea, digestive tract development, gastrointestinal pH, intestinal tissue morphology, intestinal microflora The effects of digestive enzyme activity and intestinal mucosal antibody secretion were further explored to further investigate the feeding effect of microcapsule acidifiers in weaned pig diets.
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