1. This study quantified xylanase-induced changes in soluble monosaccharides, xylooligosaccharides (XOS) and volatile fatty acid (VFA) contents of the different sections of the gastrointestinal tract (GIT) and whether these were related to altered bird performance.

2. An in vitro digestion of the wheat-based diet was carried out with the xylanase (Econase XT at 16,000BXU/kg diet) to compare the in vitro and in vivo generation of these XOS and monosaccharides. For the in vivo study, 80 male Ross 508 b roiler chicks were split into two groups fed a wheat-based diet with or without Econase XT (16,000BXU/kg diet) for 21 days.

3. There were no effects of Econase XT inclusion on growth performance characteristics, likely a result of the high-quality wheat diet, the corresponding high performance of the control group (FCR average of 1.45 in controls) and the relatively young age of the birds (from four to 26 days of age).

4. Econase XT supplementation increased the xylotetraose (X₄) content in the colon (P = 0.046, enzyme x GIT section interaction) and the xylose contents in the colon and caeca (P < 0.001, enzyme x GIT section interaction).

5. The trend for increased acetate production in the caeca of Econase XT treated birds (P = 0.062) suggested that the XOS generated were subsequently fermented in the caeca, potentially impacting upon the types of microbiota present.

6. The present study suggested that wheat arabinoxylan degradation was enhanced by xylanase supplementation, which may have increased the production of beneficial volatile fatty acids (VFA) in the caeca, and thereby potentially modulated the caecal microbiome, but without affecting bird performance at this early age.

1.这项研究量化了木聚糖酶诱导的胃肠道（GIT）不同部分的可溶性单糖，木寡糖（XOS）和挥发性脂肪酸（VFA）含量的变化，以及这些变化是否与鸟类性能的改变有关。

2.用木聚糖酶（Econase XT，16,000BXU / kg饮食）对小麦基饮食进行体外消化，以比较这些XOS和单糖的体外和体内生成。对于体内研究，80只Ross雄508 b roiler雏鸡分裂成两个组饲喂以小麦为主的饮食具有或不具有Econase XT（16,000BXU / kg饲料），持续21天。

3.加入Econase XT对生长性能没有影响，可能是高质量的小麦饮食，对照组相应的高性能（对照组的FCR平均为1.45）和相对较年轻的雏鸡的结果（从4到26天的年龄）。

4.补充Econase XT可以增加结肠中的木_四糖（X ₄）含量（P = 0.046，酶x GIT截面相互作用）和结肠和盲肠中的木糖含量（P <0.001，酶x GIT截面相互作用）。

5.经Econase XT处理的禽类的盲肠中醋酸盐产量增加的趋势（P = 0.062）表明，产生的XOS随后在盲肠中发酵，可能影响存在的微生物群的类型。

6.本研究表明，通过添加木聚糖酶可增强小麦阿拉伯木聚糖的降解，这可能增加了盲肠中有益挥发性脂肪酸（VFA）的产生，从而潜在地调节了盲肠微生物组，但在此早期不影响禽类生长年龄。