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    Effect of Partially Protected Sodium Butyrate on Performance, Digestive Organs, Intestinal Villi and E. coli Development in Broilers Chickens
    (Science Alert, 2014-06-15)
    F. Chamba
    ;
    M. Puyalto
    ;
    A. Ortiz
    ;
    H. Torrealba
    ;
    J.J. Mallo
    The aim of this study was to evaluate the effect of partially protected sodium butyrate (PSB) onperformance, digestive organs, intestinal villi and E. coli development in broilers chickens. Nine hundredtwenty four one-day-old mixed Cobb chicks were divided in 3 treatments with 7 replicates each in a®randomized block design. Treatment T1 was a control diet without any growth promoter, treatment T2 wasthe control diet plus colistin at 100,000 IU/kgBW and treatment T3 was the control diet with PSB at 700 ppm.Chicks were fed in mash form for 3 phases: starter (1-14 days), grower (15-28 days) and finisher (29-42days). There were no significant differences on performance among all treatments in starter phase. Chicksfed PSB in grower and finisher phases had the highest weight gain and the best feed conversion ratio.Relative digestive organs weights were not affected by treatment in any phase. Jejunum and small intestinerelative lengths of birds fed PSB and colistin at 14 days were longer than those of birds fed control diet.Jejunal villi of birds fed PSB and colistin at 42 days were higher than those in birds fed the control diet.Colistin produced the deepest crypts and the lowest villi height/crypt depth ratios in all intestinal segmentsat 14 days. Intestinal E. coli growth was not affected by any treatment. These data indicate that partiallyprotected sodium butyrate and colistin improves performance, colistin as an antibiotic growth promoter andPSB by improving intestinal villi development in broilers chickens.
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    Using in feed xylanase or stimbiotic to reduce the variability in corn nutritive value for broiler chickens
    (Elsevier BV, 2024-03)
    MELO DURÁN, DIEGO ALEXANDER  
    ;
    Gemma González-Ortiz
    ;
    Michael R. Bedford
    ;
    VILLAGOMEZ ESTRADA, SANDRA DANIELA  
    ;
    Mercè Farré
    This study investigated the effects of xylanase and stimbiotic (fiber fermentation enhancer) on the response of broiler chickens fed different corn varieties and determine correlations between variables of interest. Four corn genetic varieties were selected based on their range in nutrient composition. Diets containing 600 g/kg of each corn were supplemented with 0 or 100 g/ton of xylanase or stimbiotic. A total of 1,152 one-day-old male broiler chicks (Ross 308) were divided into 12 treatments, each with 8 pens and 12 birds per pen, for a 21-day study. On d 21, performance parameters were measured, and the ileal energy and organic matter (OM) digestibility and cecal xylanase activity determined. Stimbiotic supplementation improved mFCR compared with all other treatments. There was a treatment by corn variety interaction for body weight (BW), BW gain and coefficient of variation (CV) of BW (P ≤ 0.05). Birds fed corn Variety 1 (highest neutral dietary fiber, protein and soluble arabinoxylan content) supplemented with stimbiotic had the highest BW, while Variety 2 control diet had the lowest. The BW CV in corn Variety 2 was the highest, which improved with stimbiotic supplementation. The BW CV in corn Variety 1 responded better to stimbiotic than xylanase. There were no treatment differences on BW CV in corn Varieties 3 and 4. The lowest OM digestibility was observed in birds fed corn Variety 1 with xylanase, and the highest value was associated with corn Variety 3 with xylanase (highest total arabinoxylan). Xylanase and stimbiotic supplementation increased the endogenous xylanase activity regardless of the corn variety (P ≤ 0.05). Positive correlations between corn fiber contents and phytic acid and the arabinose:xylose ratio were seen, while nonstarch polysaccharide content was negatively correlated with apparent metabolizable energy. In conclusion, corn variety influenced nutrient digestibility and broiler chicken growth. The response to supplementation with xylanase or stimbiotic varied based on the nutritional profile of corn with regards to improvements in digestibility and performance in broiler chickens.