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1.
饲粮蛋白质水平与早期断奶仔猪组织病理变化的关系   总被引:2,自引:0,他引:2  
选择30头28±2日龄断奶仔猪(平均体重4.5kg),研究饲粮粗蛋白质(CP)水平对早期断奶仔猪组织病理变化的影响。试验结果显示:(1)饲粮CP水平分别与仔猪的CP摄入量、CP表观消化率、可消化CP摄入量、未消化CP摄入量存在显著(P<0.05)或极显著(P<0.01)的正相关。(2)CP真消化率则不受饲粮CP水平的影响,两者的相关关系不显著(P>0.05)。(3)饲粮CP水平分别与结肠内容物中挥发性盐基氮(VBN)和氨氮(AN)含量存在显著(P<0.05)的正相关。(4)饲粮CP水平与血浆VBN含量存在显著(P<0.05)的正相关;但血浆AN含量则不受饲粮CP水平的影响,两者的相关关系不显著(P>0.05)。(5)随着饲粮CP水平升高,仔猪结肠、肝、肺和肾组织的病变指数增加。试验结果表明,随着饲粮CP水平升高,仔猪结肠内蛋白质腐败作用增强,腐败产物产量增加,吸收进入体内的腐败产物亦增加;腐败产物的增加使仔猪器官组织的损伤加重  相似文献   

2.
饲粮类型和蛋白质水平对早期断奶仔猪生产性能的影响   总被引:10,自引:0,他引:10  
选48头28±2日龄断奶仔猪(平均体重约5.5千克),随机分成8组,采用2×4设计研究2种饲粮类型与4个粗蛋白质(CP)水平(22、18、17和14%)对仔猪生产性能的影响。试验结果显示:①低蛋白质饲粮使仔猪血浆尿素氮(PUN)含量和腹泻指数显著降低(P<0.05或0.01)。②采食全植物蛋白型饲粮的仔猪,其平均日增重(ADG)和平均日采食量(ADFI)低于(P<0.01)采食复合蛋白型饲粮的仔猪。前者的料肉比(F/G)趋于高于后者,但差异不显著(P>0.05)。前者的PUN含量高于(P<0.01)后者。③对于ADG、ADFI和PUN指标,存在饲粮类型×CP水平的交互作用(P<0.05或0.01)。④全植物蛋白型饲粮和复合蛋白型饲粮取得最大日增重的CP水平(%)分别为18.9和19.9。试验结果表明,复合蛋白型饲粮的饲养效果优于全植物蛋白型饲粮。饲粮类型不同,蛋白质的适宜水平也不同。  相似文献   

3.
《中国畜牧杂志》1995,(4):11-13
本研究选用18头28±1日龄断奶的杂交仔猪(平均体重约5.5kg),研究低蛋白质氨基酸平衡饲粮对早期断奶仔猪腹泻和生产性能的影响。试验结果显示:(1)低蛋白质氨基酸平衡饲粮使仔猪血浆挥发性盐基氨含量、血浆尿素氨含量和腹泻指数降低(P<0.05或0.01)。(2)采食全植物蛋白型氨基酸平衡饲粮(CP18.3%)的仔猪,其平均日增重(ADG)、平均日采食量(ADFI)和料肉比(P/G)与采食复合蛋白型对照饲粮(CP19.7%)的仔猪差异不显著(P>0.05),但前者的增重成本比后者降低(P<0.05)31%。(3)采食复合蛋白型氨基酸平衡饲粮(CP18.4%)的仔猪的生产性能优于采食复合蛋白型对照饲粮(CP19.7%)的仔猪,前者的ADG和ADFI分别提高(P<0.05)61%和32%,F/G和增重成本分别下降(P<0.05)24%和37%。(4)采食全植物蛋白型氨基酸平衡饲粮的仔猪,其ADG和ADFI低于(P<0.01)采食复合蛋白型氨基酸平衡饲粮的仔猪。前者的F/G和增重成本趋于高于后者,但差异不显著(P>0.05)。以上结果表明,低蛋白质氨基酸平衡饲粮可显著降低仔猪断奶后腹泻和提高仔猪生产性能。复合蛋白型?  相似文献   

4.
选用 2 6日龄断奶的长白×荣昌杂交仔猪 (平均体重 4 .8kg) ,研究饲粮类型和蛋白质水平对早期断奶仔猪结肠结构和功能、结肠内蛋白质代谢的影响。结果显示 :( 1 )与采食复合蛋白型饲粮的仔猪比较 ,采食全植物蛋白型饲粮的仔猪 ,其结肠组织病变指数较高 (P <0 .0 5) ,结肠吸水率较低 (P <0 .0 5) ,腹泻程度较重。 ( 2 )与采食常规粗蛋白质 (CP)水平 ( 2 1 .8%)饲粮的仔猪比较 ,低蛋白质 (CP1 7.8%)氨基酸平衡饲粮使仔猪结肠组织病变指数降低 (P <0 .0 5) ,结肠吸水率增高 (P <0 .0 5) ,腹泻程度减轻一半。 ( 3 )与全植物蛋白型饲粮比较 ,复合蛋白型饲粮有利于降低 (P <0 .1 0 )结肠内容物中含氮腐败产物含量。 ( 4)与常规CP水平 ( 2 1 .8%)饲粮比较 ,低蛋白质 (CP1 7.8%)氨基酸平衡饲粮显著 (P <0 .0 5) ,使结肠内容物中含氮腐败产物含量降低。结果表明 ,复合蛋白型饲粮和低蛋白质氨基酸平衡饲粮有利于降低结肠内蛋白质腐败产物产量 ,从而减少结肠组织结构的变化 ,增强结肠的吸水力 ,降低仔猪腹泻程度 ;结肠内蛋白质腐败产物增多 ,进而引起结肠组织结构改变和结肠吸水功能降低 ,可能是大肠蛋白质腐败性腹泻的重要发生机制  相似文献   

5.
仔猪断奶应激对血液和生化的影响   总被引:13,自引:0,他引:13  
随机选取 10 头健康的42~45 天断奶长白仔猪,分别于断奶时、断奶后7 天、14 天上午采血,检验血液学、血清生化等多项指标,结果如下:仔猪血清 A S T、 C K、 L D H 活性在断奶后 7 天时都升高,其中 A S T、 L D H活性与断奶时相比差异极显著( P< 001);血清 A M Y L 活性,断奶后均比断奶时高,但无统计学上差异( P>005);血清 T P、 G L O B、 A L B、 B U N、 C H O L 含量在断奶后极显著或显著降低( P< 001 或 P< 005); G L U、 C R E A、 T C O2 含量降低,但无统计学上差异( P> 005)。血液 R B C、 H G B、 H C T、 M C V 断奶后极显著降低( P<001), M C H C 断奶后极显著升高( P< 001); W B C、 P L T 等断奶后虽有变化,但均无统计学上差异( P>005)。结果表明,仔猪在断奶后一段时间,处于营养缺乏性单纯小红细胞性贫血状态。  相似文献   

6.
本试验旨在研究粗饲料组合对奶牛饲粮养分消化率、能量和氮的利用的影响。试验采用单因素随机区组设计,将 16头体重、年龄、胎次相近的,处于干奶期的健康荷斯坦奶牛分为 4组,每组 4头。以常用的粗饲料设计 A(玉米青贮 +玉米秸秆)、B(玉米青贮 +羊草)、C(玉米青贮 +玉米秸秆 +羊草)、D(玉米青贮 +苜蓿草 +羊草)4种粗饲料组合的饲粮。结果表明:饲粮D干物质、有机物和中性洗涤纤维的消化率最高,显著高于其他各饲粮(P<0.05),其次为饲粮B和饲粮 C,饲粮 A最低,显著低于其他各饲粮(P<0.05),各饲粮的酸性洗涤纤维消化率差异不显著(P>0.05)。粗饲料组合显著影响饲粮摄入总能、能量消化率和能量代谢率(P<0.05),饲粮 D甲烷能占摄入总能比显著低于其他 3种饲粮(P<0.05)。各饲粮的粪氮、尿氮占摄入总氮比差异不显著(P>0.05),饲粮 D的氮消化率显著高于饲粮 B与饲粮 C(P<0.05),且饲粮 B显著高于饲粮 A(P<0.05);饲粮 B、饲粮 D的氮利用率显著高于饲粮 A(P<0.05)。由此可见,玉米青贮 +苜蓿草 +羊草型饲粮的养分消化率、能量和氮的利用均优于其他各饲粮,羊草与玉米秸秆之间存在正组合效应,两者搭配使用可提高玉米秸秆的消化率,优化能量和氮的利用。  相似文献   

7.
选用26日龄断奶的长白×荣昌杂交仔猪(平均体重4.8kg),研究饲粮类型(全植物蛋白型和复合蛋白型)、饲粮粗蛋白质(CP)水平(常规CP水平和氨基酸平衡的低CP水平)和添加抑菌促生长剂对早期断奶仔猪CP和粗脂肪(EE)消化率、腹泻和生产性能的影响。试验结果显示:(1)复合蛋白型饲粮(CP21.8%)的CP和EE消化率高于全植物蛋白型饲粮(CP21.6%)。复合蛋白饲粮使仔猪腹泻指数明显降低。采食复  相似文献   

8.
本试验旨在研究饲粮粗蛋白质(CP)水平对中国荷斯坦奶牛产奶性能、氮利用及血液激素的影响。采用重复 4×4拉丁方设计,8头经产中国荷斯坦奶牛随机分为 4个处理。4个处理的饲粮 CP水平分别为 12.56%、13.96%、15.53%和 16.93%。试验分为 4个周期,每个周期18d。在 4d收集期内,全量收集粪、尿,每天测量产奶量、乳成分和干物质摄入量(DMI),并在收集期最后 1d采集血样。结果表明:4个饲粮处理的 DMI基本相同(P>0.05);饲粮 CP水平12.56%的产奶量和能量校正奶(ECM)明显低于饲粮 CP水平 13.96%至 16.93%(P<0.05),饲粮 CP水平 13.96%至 16.93%的产奶量和 ECM 基本相同,其中饲粮 CP水平 13.96%和16.93%的产奶量分别为28.18和28.72kg/d,ECM分别为32.64和32.04kg/d;乳成分中仅乳蛋白率随着饲粮 CP水平增加而提高(P<0.05);饲粮 CP水平 12.56%和 13.96%的乳氮效率明显高于饲粮 CP水平 15.53%和 16.93%(P<0.05或 P<0.01);随着饲粮 CP水平的提高,尿氮排出量不断增加,乳氮排出量也缓慢上涨,体内氮沉积显著增加(P<0.05或 P<0.01),只有饲粮 CP水平 16.93%的粪氮排出量明显增加(P<0.05);饲粮 CP水平 12.56%的血液瘦素浓度最高(P<0.05),催乳素(PRL)、生长激素(GH)、胰岛素样生长因子 1(IGF 1)、血糖、非酯化脂肪酸(NEFA)和 β-羟丁酸(BHBA)浓度较高;而饲粮 CP水平 16.93%的血浆尿素氮(PUN)浓度最高(P<0.01),胰岛素和 GH浓度较高,IGF 1浓度较低。由此可见,饲粮 CP水平13.96%适合中国荷斯坦奶牛产奶量28kg/d或 ECM32kg/d的泌乳性能、氮利用和内分泌调节。  相似文献   

9.
断奶仔猪赖氨酸需求参数的研究   总被引:9,自引:1,他引:8  
试验选取体重约8千克的杜×大×长三元杂交断奶仔猪(公母各半)72头,随机分为6组,每组2个重复,每个重复6头猪,分别喂以含赖氨酸(Lys)水平为0.85,0.95,1.05,1.10,1.15,1.20%的饲粮。通过测定饲粮Lys水平对断奶仔猪生产性能和血清氮浓度的影响,探讨断奶仔猪Lys的需求参数。结果表明,随着饲粮中Lys水平的提高,仔猪的平均日增重增加,饲料转化率显著改善(P<0.05),并且在1.15%的Lys组生产性能达到最佳,进一步提高Lys水平,生产性能反而下降。各组采食量差异不显著(P>0.05)。当饲粮Lys水平由0.85%升至1.15%,血清氮浓度无显著差异(P>0.05),但1.2%组极显著地高于其他各组(P<0.01),反映该组猪对蛋白质利用较差,这与该组猪生产性能差相符。以上结论提示,8~19千克断奶仔猪Lys需求参数为饲粮的1.15%,按AEC(1989)有关饲料Lys可消化率数据,折算其相应真可消化和表观可消化Lys为1.032%和0.967%。  相似文献   

10.
用二次回归正交设计研究了全玉米-豆饼饲粮的粗蛋白(CP)水平(x_1)和豆饼(占饲粮蛋白%)比例(x_2)对3周龄断奶至8周龄的仔猪日增重(ADG)、饲料利用率(F/G)、腹泻指数(DI)、血清脲素氮(SUN)和木糖吸收率的影响。除木糖吸收率外(随CP和SBM增加,木糖吸收率下降),其余指标的二次回归方程均达显著或极显著水平。方程如下:分析表明,在CP16~24%下,调整豆饼比例可使仔猪保持相近的生长速度和饲料利用率;高蛋白腹泻的实质是过敏性腹泻;当腹泻指数高到77时,日增重和饲料利用率下降。推荐3周龄断奶仔猪玉米-豆饼饲粮中适宜蛋白水平为24%,豆饼比例为60%。  相似文献   

11.
饲粮蛋白质水平对早期断奶仔猪氮代谢的影响   总被引:10,自引:1,他引:9  
选择30头28日龄断奶仔猪(平均体重4.5kg),研究饲粮粗蛋白质(CP)水平对早期断奶仔猪氮代谢的影响。结果显示:(1)饲粮CP水平分别与CP摄入量、CP表现消化率、可消化CP摄入量、未消化CP摄入量存在显著(P<0.05)或极显著(P<0.01)的正相关;(2)CP真消化率不受饲粮CP水平的影响,两者的相关关系不显著(P>0.05);(3)仔猪内源粪氮排泄量为0.22g/日,内源粪氮占干物质摄入量的比值为2.6g/kg;(4)饲粮CP水平分别与盲肠内容物中挥发性盐基氮(VBN)和氨氮(AN)含量的相关关系不显著(P>0.05),但饲粮CP水平分别与结肠内容物中VBN和AN含量存在显著(P<0.05)的正相关;(5)饲粮CP水平分别与血浆VBN和尿素氮含量存在显著(P<0.05)和极显著(P<0.01)的正相关,但血浆AN含量则不受饲粮CP水平的影响,两者的相关关系不显著(P>0.05)。结果表明,随着饲粮CP水平升高,CP的真消化率不变,进入大肠的蛋白质量增加,结肠内蛋白质的腐败作用增强,血中含氮代谢产物增多。  相似文献   

12.
采用2×2因子设计(蛋白水平23%或17%,ZnO100mg/kg或3000mg/kg),选用21日龄断奶的杜长大三元杂交猪32头,体质量(6.3±0.4)kg,随机分为4组,每组设4个重复,每个重复2头猪,试验期4周。试验结束后,从每个重复中随机挑选1头试猪进行屠宰,收集结肠内容物。结果表明,玉米-豆粕型基础日粮中添加3000mg/kg饲料级ZnO,对高蛋白诱发的高腹泻发生率有极显著的抑制作用(P0.01),这可能是由于高锌可明显降低结肠内容物挥发性盐基氮和氨氮含量(P0.01),显著提高高蛋白日粮的胰蛋白酶(P0.05)、胃蛋白酶活性(P0.05)和CP表观消化率(P0.05)所致。  相似文献   

13.
本试验研究芽孢杆菌、乳酸杆菌对断奶仔猪肠道微生物区系、肠道pH和挥发性盐基氮(VBN)的影响。试验选取28日龄左右的"杜×长×大三元"杂交仔猪24头,随机分为3组,每组4个重复,每个重复2头,进行为期30 d的饲养试验,试验结束后收集盲肠和结肠内容物用于微生物、pH和VBN的测定。结果表明,芽孢杆菌和乳酸杆菌均使得盲肠与结肠中乳酸杆菌相对数量都升高,降低盲肠内容物pH,结肠内容物pH升高,并降低了肠道内VBN含量。因此,芽孢杆菌和乳酸杆菌均能改善肠道微生物区系,降低肠道蛋白质的腐败变质。  相似文献   

14.
本试验旨在利用末端限制性片段长度多态性技术研究不同纤维来源饲粮和细胞壁降解酶对猪肠道微生物菌群多样性及其组成结构的影响。试验选用8头平均体重为(35.0±2.5)kg的"杜×长×大"三元杂交生长猪,统一安装回肠末端T型瘘管,随机分为4组,每组2个重复。试验分4期,每期每组猪按4×4拉丁方设计饲喂小麦麸、小麦麸加酶、大豆皮和大豆皮加酶4种试验饲粮之一。每期预试期15 d,正试期6 d。试验结果表明:1)大豆皮饲粮组猪回肠食糜微生物的多样性显著高于小麦麸饲粮组(P0.05)。2)小麦麸饲粮组显著提高猪回肠食糜中普氏菌属(Prevotella)和乳酸杆菌属(Lactobacillus)的丰度(P0.05),而大豆皮饲粮组则显著提高猪回肠食糜中瘤胃球菌属(Ruminococcus)及粪便中拟杆菌属(Bacteroides)、毛螺菌属(Lachnospira)的丰度(P0.05)。3)添加细胞壁降解酶显著提高各饲粮组猪回肠食糜中Lachnospira、真细菌属(Eubacterium)及粪便中Lachnospira的丰度(P0.05),但也同时降低了回肠食糜中Lactobacillus、Prevotella及粪便中Lactobacillus、Bacteroides和克雷伯氏菌属(Klebsiella)的丰度(P0.05)。综上所述,纤维饲粮可显著提高猪肠道内非淀粉多糖降解菌的丰度,而细胞壁降解酶则可选择性改变肠道微生物菌群的多样性及其组成。  相似文献   

15.
本研究旨在比较不同粗蛋白质(CP)水平日粮对育肥羔羊小肠养分吸收率的影响。选用体重30 kg左右,安装有瘤胃、十二指肠近端和回肠末端瘘管的3只哈萨克育肥羊为试验动物,采用3×3拉丁方试验设计,采用醋酸镱(Yb-Ac)、锂铬乙二胺四乙酸(LiCr-EDTA)分别作为消化道固相和液相食糜标记物测定小肠食糜流量。结果显示,增加全混合日粮中CP水平可显著提高育肥羊N的进食量、全消化道表观消化率和N沉积(P<0.05),显著提高干物质(DM)和有机物(OM)的表观消化率(P<0.05),但对小肠食糜流量无显著影响(P>0.05);提高日粮CP水平对十二指肠食糜除EE和嘌呤外的营养成分流量均产生显著的影响(P<0.05),仅对回肠食糜中CP、粗灰分(Ash)、DM、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)流量的影响显著(P<0.05),且对CP、Ash、DM、NDF和ADF的小肠吸收率影响显著(P<0.05)。本试验为进一步深入分析增加日粮CP水平对其在育肥羊体内的消化利用奠定基础。  相似文献   

16.
Two trials were conducted to evaluate the effects of protein source (48% CP soybean meal or casein) and carbohydrate source (25% dextrose or 25% lactose) on digestibility and digesta flow rate in early-weaned pigs. Diets contained 10% crude soybean oil and were formulated to contain 3.5 g lysine, 2.3 g Ca and 2.0 g P per 1,000 kcal DE of diet. In Trial 1, nutrient digestibility was greater for older than for younger pigs. Apparent digestibilities for energy, DM, CP and fat were lower (P less than .08) for younger and older pigs fed soybean meal rather than casein. Digestibility of soluble carbohydrates was less (P less than .02) for younger pigs fed soybean meal rather than casein as a protein source. Fat digestibility was lower (P less than .05) in younger pigs fed dextrose than in pigs fed lactose. A protein X carbohydrate source interaction (P less than .01) existed for fat digestibility by older pigs. In Trial 2, pigs were euthanatized, and digestibilities anterior to the ileum and the colon (pre-ileal and pre-cecal) were determined. At the ileum, fat digestibility was lower (P less than .05) for pigs fed soybean meal, whereas CP digestibility was lower (P less than .05) for pigs fed either soybean meal or dextrose. A protein X carbohydrate interaction was observed for ileal digestibilities of DM (P less than .06) and total carbohydrates (P less than .03) with lowest values obtained for the soybean meal plus dextrose diet. For casein diets, digestibility values were similar between the two carbohydrate sources.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

17.
The purpose of this study was to evaluate the effects of dietary Chinese medicinal herbs (CMH) supplementation composed of Panax ginseng, Dioscoreaceae opposite, Atractylodes macrocephala, Glycyrrhiza uralensis, Ziziphus jujube and Platycodon grandiflorum, on the performance, intestinal tract morphology and immune activity in weanling pigs. Two hundred and forty weaned pigs were assigned randomly to four dietary groups including the negative control (basal diet), 0.1% CMH, 0.3% CMH and 0.114% antibiotic (Chlortetracycline calcium Complex, Sulfathiazole and Procaine Penicillin G) supplementation groups for a 28-day feeding trial. Results indicated that both CMH supplementation groups had a better gain and feed/gain than control group (CT) during the first 2 weeks of the experimental period. The 0.3% CMH had a significant decrease in the diarrhoea score in first 10 days of experimental period when compared with other groups. The CMH supplementation groups had a higher villous height, increased lactobacilli counts in digesta of ileum and decreased coliform counts in colon compared with CT. The immune activities of polymorphonuclear leucocytes (PMNs), including the respiratory burst and Salmonella-killing ability, were significantly enhanced in CMH supplementation groups at day 7 of experiment period. The CMH and antibiotic supplementations increased the nutrient digestibility such as dietary dry matter, crude protein and gross energy in weanling pigs. In conclusion, the dietary CMH supplementation improved intestinal morphology and immune activities of PMNs, thus giving rise to nutrient digestibility and reduce diarrhoea frequency in weanling pigs.  相似文献   

18.
The objective of this study was to determine the functional location and disappearance of activity of a supplemental Escherichia coli AppA2 phytase and its impact on digesta P and Ca concentrations in the gastrointestinal tract of pigs. In Exp. 1, 18 pigs (8.3 +/- 0.2 kg of BW) were allotted to 3 groups (n = 6 each) and fed a low-P (0.4%) corn-soybean meal, basal diet (BD), BD + phytase [500 units (U)/kg of feed], or BD + inorganic P (iP, 0.1%) for 4 wk. In Exp. 2, 30 pigs (14.5 +/- 0.2 kg of BW) were allotted to 3 groups (n = 10 each) and fed BD, BD + 500 U of phytase/kg of feed, or BD + 2,000 U of phytase/kg of feed for 2 wk. Five or six pigs from each treatment group were killed at the end of both experiments to assay for digesta phytase activity and soluble P concentration in 6 segments of the digestive tract and digesta total P and Ca concentrations in stomach and colon. Compared with pigs fed BD, pigs fed BD + 500 U of phytase/kg of feed in Exp. 1 and BD + 2,000 U of phytase/kg of feed in Exp. 2 had greater (P < 0.05) phytase activities in the digesta of the stomach and upper jejunum (2 m aborally from the duodenum). No phytase activity was detected in the digesta of the lower jejunum (2.12 m cranial to the ileocecal junction) or ileum from any of the treatment groups in either trial. Concentrations of digesta-soluble P peaked in the upper jejunum of pigs fed BD in Exp. 1 and 2, but showed gradual decreases between the stomach and the upper jejunum of pigs fed BD + phytase or BD + iP. In both experiments, pigs fed only BD had greater (P < 0.05) colonic digesta phytase activity and soluble P concentrations than those fed phytase. In Exp. 2, total colonic digesta P or Ca concentrations, or both, of pigs displayed a phytase-dose-dependent reduction (P < 0.05). In conclusion, supplemental dietary AppA2 mainly functioned in the stomach and was associated with a reduced phytase activity in colonic digesta of weanling pigs.  相似文献   

19.
In theory, supplementing xylanase in corn-based swine diets should improve nutrient and energy digestibility and fiber fermentability, but its efficacy is inconsistent. The experimental objective was to investigate the impact of xylanase on energy and nutrient digestibility, digesta viscosity, and fermentation when pigs are fed a diet high in insoluble fiber (>20% neutral detergent fiber; NDF) and given a 46-d dietary adaptation period. A total of 3 replicates of 20 growing gilts were blocked by initial body weight, individually housed, and assigned to 1 of 4 dietary treatments: a low-fiber control (LF) with 7.5% NDF, a 30% corn bran high-fiber control (HF; 21.9% NDF), HF + 100 mg xylanase/kg (HF + XY [Econase XT 25P; AB Vista, Marlborough, UK]) providing 16,000 birch xylan units/kg; and HF + 50 mg arabinoxylan-oligosaccharide (AXOS) product/kg (HF + AX [XOS 35A; Shandong Longlive Biotechnology, Shandong, China]) providing AXOS with 3–7 degrees of polymerization. Gilts were allowed ad libitum access to fed for 36-d. On d 36, pigs were housed in metabolism crates for a 10-d period, limit fed, and feces were collected. On d 46, pigs were euthanized and ileal, cecal, and colonic digesta were collected. Data were analyzed as a linear mixed model with block and replication as random effects, and treatment as a fixed effect. Compared with LF, HF reduced the apparent ileal digestibility (AID), apparent cecal digestibility (ACED), apparent colonic digestibility (ACOD), and apparent total tract digestibility (ATTD) of dry matter (DM), gross energy (GE), crude protein (CP), acid detergent fiber (ADF), NDF, and hemicellulose (P < 0.01). Relative to HF, HF + XY improved the AID of GE, CP, and NDF (P < 0.05), and improved the ACED, ACOD, and ATTD of DM, GE, CP, NDF, ADF, and hemicellulose (P < 0.05). Among treatments, pigs fed HF had increased hindgut DM disappearance (P = 0.031). Relative to HF, HF + XY improved cecal disappearance of DM (162 vs. 98 g; P = 0.008) and NDF (44 vs. 13 g; P < 0.01). Pigs fed xylanase had a greater proportion of acetate in cecal digesta and butyrate in colonic digesta among treatments (P < 0.05). Compared with LF, HF increased ileal, cecal, and colonic viscosity, but HF + XY decreased ileal viscosity compared with HF (P < 0.001). In conclusion, increased insoluble corn-based fiber decreases digestibility, reduces cecal fermentation, and increases digesta viscosity, but supplementing xylanase partially mitigated that effect.  相似文献   

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