Table 3.
Duration, Day of Age | Activity | % Change * | Reference ** |
---|---|---|---|
1–42 | ND 1 | Final body weight (2%), ADFI 2 (−2%), tissue protein content (14%), gizzard weight (−8%), duodenum-jejunum weight (−8%), ileal digesta viscosity (ND), ileum lactic acid bacteria (4%) | [217] |
1–25 | 0–200 FXU/kg feed | ADG 3 (12%), FCR 4 (−9%), excreta moisture (−5%), jejunum arabinose (80%), jejunum xylose (95%), ileum arabinose (88%), ileum xylose (97%), duodenum digesta viscosity (−33%), jejunum digesta viscosity (−49%) | [218] |
1–22 | 0–1000 XU/kg feed | ADG (14%), ADFI (10%), FCR (−5%), duodenum digesta viscosity (−29%), jejunum digesta viscosity (−23%), ileum digesta viscosity (−39%), jejunum weight (−16%), jejunum length (−16%), jejunum crypt depth (−13%) | [113] |
1–41 | 0–2000 U/kg feed | ADG (10%), FCR (−6%), in-vitro intrinsic viscosity (−38%) | [219] |
1–28 | 0–500 U/kg feed | Jejunum digesta viscosity (−85%) | [220] |
1–18 | ND | ADG (10%), ADFI (16%), ileum length (−30%), jejunum crypt depth (−19%) | [221] |
1–21 | 0–1000 XU/kg feed | FCR (−2%), AME 5 (3%) | [222] |
7–28 | 0–500 U/kg feed | G:F 6 (8–16%), jejunum digesta viscosity (−18%), DM 7 digestibility (27–37%) | [223] |
1–28 | 0–2500 GXU/kg feed | ADFI (9%), jejunum digesta viscosity (−11%), cecum arabinose concentration (59%) | [224] |
1–43 | 0–16,000 U/kg feed | FCR (−3%), N 8 digestibility (3%), ileal digestible energy digestibility (3%), threonine digestibility (5%), lysine digestibility (3%) | [225] |
1–24 | 0–200 FXU/kg feed | ADG (3%), G:F (4%), jejunum digesta viscosity (−21%), DM retention (10%), CP 9 retention (13%), energy retention (9%) | [226] |
1–42 | 0–2000 U/kg feed | ADG (15%), FCR (−11%), cecum Salmonella prevalence (−62%) | [227] |
1–35 | ND | Feed conversion ratio (−3%), starch digestibility (4%), fat digestibility (3%), AME retention (4%) | [228] |
1–43 | 0–16,000 BXU/kg feed | FCR (−3%) | [229] |
1–43 | 0–16,000 XU/kg feed | Serum insulin (%), serum peptide YY (61%), cecal VFA 10 (−4%) | [230] |
1–35 | 0–250 FXU/kg feed | Ileum viscosity (−20%), ileum xylose concentration (−14%), jejunum protein content (28%) | [231] |
1–32 | 0–32,000 BXU/kg feed | No effects on the evaluated parameters | [232] |
1–50 | 0–16,000 BXU/kg feed | FCR (−7%), DM digestibility (9%), ileal digestible energy (7%), N digestibility (4%), cecum temperature (4%) | [233] |
1–43 | 0–1250 XU/kg feed | ADG (7%), FCR (−5%), jejunum viscosity (−49%), cecum acetic acid concentration (35%), fat digestibility (5%), CP digestibility (4%), DM retention 3%), fat retention (6%), P 11 retention (6%), NDF 12 retention (14%), ADF 13 retention (42%), AME (2%) | [234] |
1–21 | 0–5500 U/kg feed | FCR (−7%) | [235] |
1–49 | 0–32,000 BXU/kg feed | FCR (−6%), energy digestibility (6%), gizzard weight (16%), cecum propionic acid concentration (22%), cecum caproic acid concentration (24%) | [236] |
7–21 | 0–2000 U/kg feed | AME (1%), DM retention (2%), fat digestibility (2%) | [237] |
1–42 | 0–160,000 BXU/kg feed | Gizzard weight (17%), gizzard length (19%) | [238] |
1–42 | 0–2000 XU/kg feed | FCR (−2%), ileal digestible energy (8%), starch digestibility (1%), N digestibility (5%), GE digestibility (8%), ileum total NSP 14 concentration (−26%) | [239] |
1–36 | 0–5625 XU/kg feed | ADG (2%), GE 15 digestibility (3%), CP digestibility (4%), DM digestibility (1%), RA 16 of ileal Lactobacillus (12%), cecal Lactobacillus (11%), ileal Escherichia coli (−15%), and cecal Escherichia coli (−11%), duodenum villus height (8%), jejunum villus height (10%), ileum villus height (12%) | [240] |
1–42 | 0–16,000 BXU/kg feed | FCR (−4%) | [241] |
1–41 | 0–24,000 BXU/kg feed | Mortality (−54%) | [242] |
1–42 | 0–16,000 BXU/kg feed | FCR (−3%), duodenum acetic acid concentration (12%) | [243] |
1–42 | 0–200 FXU/kg feed | FCR (−1%), jejunum digesta viscosity (−40%), ileum digesta viscosity (−58%) | [244] |
1–29 | 0–160,000 BXU/kg feed | FCR (−8%), copper digestibility (44%) | [245] |
1–30 | 0–32,000 BXU/kg feed | Ileal frutose (31%), ileal arabinose (29%), ileal galactose (33%) | [215] |
1–33 | 0–11,250 XU/kg feed | ADG (3%), FCR (−4%), DM digestibility (4%), GE digestibility (4%), ileum digesta viscosity (−12%), duodenum villus height (8%), jejunum villus height (9%) | [246] |
1–43 | 0–16,000 BXU/kg feed | ADG (5%), final body weight (6%), acetate (27%), total SCFA 17 (24%) | [214] |
* The described effects were in comparison with treatments without xylanase. Described effects were considered significant with p < 0.05 and tendency with 0.05 ≤ p < 0.10. ** The references were selected from peer-reviewed literature available after 2000. 1 No data. 2 Average daily feed intake. 3 Average daily gain. 4 Feed conversion ratio. 5 Apparent metabolizable energy. 6 Gain to feed ratio. 7 Dry matter. 8 Nitrogen. 9 Crude protein. 10 Volatile fatty acids. 11 Phosphorus. 12 Neutral detergent fiber. 13 Acid detergent fiber. 14 Non-starch polysaccharides. 15 Gross energy. 16 Relative abundance. 17 Short chain fatty acids.