断奶仔猪干物质、钙和磷消化率的新型植酸酶的剂量反应。

Dose response of a new phytase on dry matter, calcium, and phosphorus digestibility in weaned piglets.

机构信息

Lallemand, Unit16, Cirencester Business Park, Tetbury Road, Cirencester, Gloucestershire, GL7 6JJ, UK.

出版信息

J Anim Sci. 2012 Dec;90 Suppl 4:245-7. doi: 10.2527/jas.53988.

Abstract

The present study evaluated the dose response of Buttiauxella phytase on apparent total tract digestibility (ATTD) of DM, Ca, and P in weaned pigs at 2 locations. Experimental diets fed to weaned pigs were a positive control (PC), a negative control (NC), and NC supplemented with increasing levels of Buttiauxella phytase. In Trial A, ATTD of P was 57.2% for PC, 32.5% for NC, and 59.4, 62.0, 63.8, 66.0, and 67.3% for 250, 500, 750, 1000, and 2000 phytase units (FTU) added to NC, respectively. In Trial B, ATTD of P was 45.2% for PC, 28.4% for NC, and 58.7, 64.1, 67.9, and 70.9% for 250, 500, 1000, and 2000 FTU added to NC, respectively. In both studies, the reduction in P in the NC diets reduced (P < 0.01) ATTD of P when compared with the PC diets. Phytase supplementation linearly and quadratically increased (P < 0.01) ATTD of P at all inclusion levels to the NC diet. In conclusion, the average digestible P increase from Buttiauxella phytase (vs. the NC diet) was 1.3, 1.5, 1.6, and 1.7 g digestible P/kg feed for 250, 500, 1000, and 2000 FTU/kg, respectively.

摘要

本研究在两个地点评估了毕赤酵母植酸酶对断奶仔猪表观总肠道消化率（ATTD）的剂量反应。给断奶仔猪喂食的实验日粮有阳性对照（PC）、阴性对照（NC）和补充不同水平毕赤酵母植酸酶的 NC。在试验 A 中，PC 的 P 消化率为 57.2%，NC 为 32.5%，NC 分别添加 250、500、750、1000 和 2000 植酸酶单位（FTU）时，P 消化率为 59.4%、62.0%、63.8%、66.0%和 67.3%。在试验 B 中，PC 的 P 消化率为 45.2%，NC 为 28.4%，NC 添加 250、500、1000 和 2000 FTU 时，P 消化率分别为 58.7%、64.1%、67.9%和 70.9%。在这两项研究中，与 PC 日粮相比，NC 日粮中 P 的减少降低了 P 的 ATTD（P<0.01）。植酸酶补充剂在线性和二次方上增加了 NC 日粮中 P 的 ATTD（P<0.01），添加到所有水平。总之，与 NC 日粮相比，毕赤酵母植酸酶（vs. NC 日粮）分别使可消化 P 增加了 1.3、1.5、1.6 和 1.7 g/千克饲料。