Table 4.

A list of studies describing effects of xylanase supplemented individually at different levels in diets for nursery pigs.

Duration, Day of Age	Activity	% Change *	Reference **
35–70	0–4000 XU/kg feed	DM 1 fecal digestibility (1%), N 2 digestibility (2%)	[247]
7–28	0–5600 EXU/kg feed	No effects on the evaluated parameters	[248]
21–56	ND 3	FCR 4 (−3%), CP 5 digestibility (4%), fat digestibility (2%), starch digestibility (1%), total amino acids digestibility (3%), leucine digestibility (2%), isoleucine digestibility (4%), jejunum digesta viscosity (−76%), colon digesta viscosity (−81%), jejunum acetate concentration (27%), jejunum propionate concentration (30%), total conjugated/deconjugated bile acids (33%)	[249]
ND	0–1500 U/kg feed	CP digestibility (2%), crude ash digestibility (2%), Ca 6 digestibility (3%), P 7 digestibility (1%), ADF 8 digestibility (9%)	[250]
ND1	0–1400 LXU/kg feed	NDF 9 digestibility (36%), DM digestibility (17%), GE 10 digestibility (15%), OM 11 digestibility (15%), jejunum digesta viscosity (−14%)	[29]
ND	0–0.01%	ADG 12 (5%), G:F 13 (4%), DM digestibility (3%), N digestibility (4%), GE digestibility (3%), fecal Lactobacillus (1%)	[69]
28–56	0–4000 XU/kg feed	DM digestibility (2%), NDF digestibility (23%), P digestibility (29%)	[251]
21–49	0–4000 XU/kg feed	ADG (14%), DM digestibility (4%), CP digestibility (7%), NDF digestibility (19%), ADF digestibility (15%), Ca digestibility (22%), P digestibility (14%), fecal Lachnospiraceae (−50%)	[252]
23–43	0–1500 EPU/kg feed	SCFA 14 (20%), acetate (32%), propionate (19%), total NSP 15 digestibility coefficient (15%), arabinoxylan digestibility coefficient (38%), GE digestibility coefficient (8%), duodenum villus height (11%), jejunum crypt proliferation rate (17%), jejunum claudin (57%), jejunum occludin (75%), jejunum zonula occludens 1 (80%), jejunum digesta viscosity (−26%)	[30]
21–45	0–45,000 XU/kg feed	ADG (6%), jejunal digesta viscosity (−13%), jejunum mucosal MDA 16 (−17%), jejunum crypt depth (−10%), jejunum crypt cell proliferation (−15%)	[23]
18–53	0–16,000 BXU/kg feed	Ileum pH (6%), colon pH (3%), CP digestibility (7%), DM digestibility (3%), Ca digestibility (16%), P digestibility (8%), colon propionic acid concentration (10%)	[253]
21–41	0–1500 EPU/kg feed	ADG (7%), jejunal digesta viscosity (−14%), plasma TNF-α 17 (−36%), GE digestibility (6%), NDF digestibility (22%), duodenum crypt depth (11%)	[58]
23–65	0–16,000 BXU/kg feed	Ileum Clostridiaceae (−10%), cecum Lactobacillaceae count (36%)	[254]
21–63	0–16,000 XU/kg feed	ADG (9%), DM digestibility (4%), GE digestibility (3%), N digestibility (3%) and P digestibility (15%), RA 18 fecal Veillonella spp. (−33%)	[255]
21–59	0–1760 XU/kg feed	Jejunal digesta viscosity (−23%), jejunum mucosal MDA (−39%), jejunum mucosal PC 19 (−15%), jejunum villus height (13%), NDF digestibility (6%), EE 20 digestibility (6%), RA of jejunum Cupriavidus (−43%), Megasphaera (−82%), Succinivibrio (73%), and Pseudomonas (63%)	[5]
28–63	0–135,000 U/kg feed	ADG (18%), ADFI (−2%), G:F (20%), diarrhea rate (−61%), DM digestibility (4%), CP digestibility (6%), EE digestibility (8%), NDF digestibility (2%), ADF digestibility (7%), GE digestibility (30%), starch digestibility (27%), N digestibility (26%), jejunum villus height (15%), feces propionate concentration (41%), fecal butyrate concentration (35%), feces ammonia concentration −26%)	[256]

* 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 Dry matter. ² Nitrogen. ³ No data. ⁴ Feed conversion ratio. ⁵ Crude protein. ⁶ Calcium. ⁷ Phosphorus. ⁸ Acid detergent fiber. ⁹ Neutral detergent fiber. ¹⁰ Gross energy. ¹¹ Organic matter. ¹² Average daily gain. ¹³ Gain to feed ratio. ¹⁴ Short chain fatty acids. ¹⁵ Non-starch polysaccharides. ¹⁶ Malondealdehyde. ¹⁷ Tumor necrosis factor alpha. ¹⁸ Relative abundance. ¹⁹ Protein carbonyl. ²⁰ Ether extract.