176 Whole-grain fiber composition modifies phosphorus digestibility in grower pigs
176 Whole-grain fiber composition modifies phosphorus digestibility in grower pigs
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176 全谷物纤维成分可改变生长猪的磷消化率
DOI：
10.1093/jas/skz122.177
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发表时间：
2019
影响因子：
3.3
通讯作者：
R. T. Zijlstra
中科院分区：
文献类型：
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作者：
C. M. E;J. M. Fouhse;T. Vasanthan;R. T. Zijlstra
由于淀粉中直链淀粉或纤维中β-葡聚糖的增加，谷物中可发酵碳水化合物的增加可能会增加内源性损失，包括P，从而降低P的表观全消化道消化率（ATTD）。本研究评估了与小麦相比，化学组成不同的大麦品种对P和Ca的表观回肠消化率（AID）和ATTD以及P的标准化全消化道消化率（STTD）的影响。在6（时期）× 5（饮食）Youden方块中，7只回肠插管手推车（27.7 kg初始体重）饲喂含有80%的5种不同直链淀粉、β-葡聚糖和纤维的谷物之一的日粮：1）高发酵、高β-葡聚糖、无壳大麦（HFB）; 2）高发酵、高直链淀粉、无壳大麦（HFA）; 3）中等发酵、无壳大麦（MFB）; 4）低发酵的带壳大麦（LFB）;和5）低发酵的硬红春小麦（LFW）。通过使用190 mg P/kg DM摄入的恒定值校正基础内源性P损失的ATTD来计算P的饮食STTD。全谷物含有8.5至16.3 µmol/g DM植酸盐（肌醇1，2，3，4，5，6-六（磷酸二氢盐）的任何盐; InsP 6）和1.6至3.0 g/kg DM InsP 6-P。使用混合模型分析数据，以饲料为固定效应，猪和时期为随机效应。以干物质为基础（g/kg），日粮中含有131 ~ 286 g中性洗涤纤维、8.8 ~ 85.4 g β-葡聚糖和8.1 ~ 8.9 g总磷。MFB、LFB和LFW的磷的AID（P < 0.001）大于HFB和HFA，MFB的磷的ATTD或STTD（P < 0.05）大于HFB。LFW组钙的ATTD显著高于LFB组（P < 0.05），而日粮对钙的AID无显著影响（P > 0.05）。总之，在特定的无壳和带壳大麦品种中，全谷物中可发酵纤维（例如β-葡聚糖）含量高，降低了饲料中P和Ca的消化率。
Increased fermentable carbohydrates in cereal grains due to more amylose in starch or β-glucan in fiber may increase endogenous losses including for P, and thereby reduce apparent total tract digestibility (ATTD) of P. This study assessed effects of barley cultivars varying in chemical composition on apparent ileal digestibility (AID) and ATTD of P and Ca, and standardized total tract digestibility (STTD) of P compared with wheat. In a 6 (period) × 5 (diet) Youden square, 7 ileal-cannulated barrows (27.7 kg initial BW) were fed diets containing 80% of 1 of 5 grains differing in amylose, β-glucan, and fiber: 1) high-fermentable, high-β-glucan, hull-less barley (HFB); 2) high-fermentable, high-amylose, hull-less barley (HFA); 3) moderate-fermentable, hull-less barley (MFB); 4) low-fermentable, hulled barley (LFB); and 5) low-fermentable, hard red spring wheat (LFW). Diet STTD of P was calculated by correcting ATTD for the basal endogenous P loss using a constant value of 190 mg P/kg DM intake. Whole grains contained between 8.5 to 16.3 µmol/g DM phytate (any salt of myo-inositol 1,2,3,4,5,6-hexakis (dihydrogen phosphate); InsP6) and 1.6 to 3.0 g/kg DM InsP6-P. Data were analyzed using a mixed model with diet as fixed effect, and pig and period as random effects. On DM basis (g/kg), diets contained 131 to 286 g neutral detergent fiber, 8.8 to 85.4 g β-glucan, and 8.1 to 8.9 g total P. The MFB, LFB, and LFW had greater (P < 0.001) AID of P than HFB and HFA, and MFB had greater (P < 0.05) ATTD or STTD of P than HFB. The LFW had greater (P < 0.05) ATTD of Ca than LFB, whereas diet did not affect (P > 0.05) AID of Ca. In conclusion, whole grains high in fermentable fiber, e.g. β-glucans, in specific hull-less and hulled barley cultivars decreased diet digestibility of P and Ca.