Two experiments were performed, using broilers or turkeys, each utilizing a 3 × 2 factorial arrangement, to compare their response to phytase and xylanase supplementation with growth performance, nutrient digestibility, and ileal phytate degradation as response criteria. For both experiments, 960 Ross 308 or 960 BUT 10 (0-day-old) birds were allocated to 6 treatments: (1) control diet, containing phytase at 500 FTU/kg; (2) the control diet with xylanase (16,000 BXU/kg); (3) the control diet supplemented on top with phytase (1,500 FTU/kg); (4) diet supplemented with 1,500 FTU/kg phytase and xylanase (16,000 BXU/kg); (5) the control diet supplemented with phytase (3,000 FTU/kg); and (6) diet supplemented with 3,000 FTU/kg phytase and xylanase (16,000 BXU/kg). Each treatment had 8 replicates of 20 birds each. Water and diets based on wheat, soybean meal, oilseed rape meal, and barley were available ad libitum. Body weight gain and feed intake were measured from 0 to 28 D, and feed conversion ratio (FCR) corrected for mortality was calculated. Ileal digestibility for dry matter and minerals on day 7 and 28 were analyzed in addition to levels of inositol phosphate esters (InsP6-3) and myo-inositol. Statistical comparisons were performed using ANOVA. Xylanase supplementation improved 28D FCR in broilers and turkeys. Increasing doses of phytase reduced FI and improved FCR only in broilers. In broilers, the age × phytase interaction for phosphorous digestibility showed that increasing phytase dose was more visible on day 7, than on day 28. Mineral digestibility was lower in 28-day-old turkey compared with 7-day-old turkey. InsP6 disappearance increased with increasing phytase levels in both species, with lower levels analyzed in turkeys. InsP6 disappearance was greater in younger turkeys (day 7 compared with day 28). In conclusion, although broilers and turkeys shared several similarities in their growth and nutrient utilization responses, the outcomes of the 2 trials also differed in many aspects. Whether this is because of difference in diets (InsP or Ca level) or differences between species needs further investigation.

中文翻译：

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植酸酶和木聚糖酶对肉鸡和火鸡性能，矿物质消化率和回肠肌醇六磷酸降解的影响的比较方面。

进行了两个实验，使用肉鸡或火鸡，每个都采用3×2因子排列，将其对植酸酶和木聚糖酶补充的反应与生长性能，养分消化率和回肠肌醇六磷酸降解作为响应标准进行了比较。在这两个实验中，将960头Ross 308或960 BUT（0日龄）的10只鸡分配给6种处理方法：（1）对照饮食，其植酸酶含量为500 FTU / kg；（2）以木聚糖酶作为对照饮食（16,000 BXU / kg）；（3）在对照饮食的基础上补充植酸酶（1,500 FTU / kg）；（4）补充1,500 FTU / kg植酸酶和木聚糖酶（16,000 BXU / kg）的饮食；（5）补充植酸酶的对照饮食（3,000 FTU / kg）；（6）饮食中补充了3,000 FTU / kg的植酸酶和木聚糖酶（16,000 BXU / kg）。每种处理均重复8次，每次重复20只鸡。以小麦为基础的水和饮食，大豆粉，油菜籽粉和大麦可随意获得。在0至28 D范围内测量体重增加和采食量，并计算校正死亡率的饲料转化率（FCR）。除肌醇磷酸酯（InsP6-3）和肌醇水平外，还分析了第7天和第28天干物质和矿物质的回肠消化率。使用ANOVA进行统计比较。补充木聚糖酶可改善肉鸡和火鸡的28D FCR。仅在肉鸡中增加肌醇六磷酸酶的剂量可以降低FI，并改善FCR。在肉鸡中，年龄×植酸酶相互作用对磷的消化率表明，与第28天相比，第7天的植酸酶剂量增加更为明显。与7天龄的火鸡相比，矿物质消化率较低。在两个物种中，随着植酸酶水平的增加，InsP6的消失也增加，而在火鸡中分析的水平更低。在年轻的火鸡中，InsP6的消失更大（与第28天相比，第7天）。总之，尽管肉鸡和火鸡在生长和养分利用方面具有相似之处，但两项试验的结果在许多方面也有所不同。无论是由于饮食差异（InsP或Ca水平）还是物种之间的差异，都需要进一步调查。