补充β-甘露聚糖酶和添加大豆壳对金棕鸡(RIR × Fayoumi)生产后期的生产性能、经济性、蛋品质、血液生化指标、营养物质消化率和肠道形态学的影响

Animals Pub Date : 2024-07-12 DOI:10.3390/ani14142047
M. Shuaib, Abdul Hafeez, Muhammad Tahir, Abubakar Sufyan, Obaid Ullah, Muhammad Adnan Shams, Shahrood Ahmed Siddiqui, Ayman A. Swelum
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引用次数: 0

摘要

本研究调查了β-甘露聚糖酶和大豆皮对产蛋鸡后期高峰生产阶段(37 至 40 周龄)的生产性能、经济效益、鸡蛋质量、血液学和血清生化学、营养物质消化率、肠道形态、消化液粘度和排泄物稠度的影响。给金棕色母鸡(RIR × Fayoumi;n = 200)饲喂对照日粮(无豆壳或酶制剂)和含有四种组合的日粮,即3%豆壳与 20 毫克/千克 β-甘露聚糖酶(D1)、3%豆壳与 30 毫克/千克 β-甘露聚糖酶(D2)、9%豆壳与 20 毫克/千克 β-甘露聚糖酶(D3)和 9%豆壳与 30 毫克/千克 β-甘露聚糖酶(D4),连续饲喂四周,四个重复,每个重复 10 只鸡。总体而言,与对照组和其他豆壳与 β-甘露聚糖酶的组合相比,D2 组的采食量、增重、饲料转化率和饮水量都明显较高(p < 0.05)。整个实验期间没有记录到死亡。与 D3 和 D4 组相比,D1 和 D2 组的经济效益最好。蛋重、蛋壳重和蛋壳厚度、蛋黄重、蛋白重和蛋白高度以及 Haugh 单位等蛋品质参数保持不变(p > 0.05)。同样,D2 组的总胆固醇、低密度脂蛋白和超低密度脂蛋白水平显著降低,肠道形态增强,绒毛宽度、高度、隐窝深度和肠段表面积增大。与对照组相比,D1 和 D2 组的粗蛋白(CP)、粗纤维(CF)、粗脂肪和灰分消化率更高(p < 0.05)。消化液粘度、排泄物稠度和其他鸡蛋质量指标未受影响。总之,日粮中添加 3% 的豆壳和 30 mg/kg β-甘露聚糖酶的组合可能对蛋鸡有潜在的益处,可改善某些生产性能、鸡蛋质量指标和经济效益,降低血液中胆固醇、低密度脂蛋白和超低密度脂蛋白的水平,提高营养物质的消化率,改善肠道形态,而不影响鸡蛋质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of β-Mannanase Supplementation and Soyhull Inclusion on Production Performance, Economics, Egg Quality, Blood Biochemicals, Nutrient Digestibility, and Intestinal Morphology in Golden Brown Hens (RIR × Fayoumi) during Late Peak Production
This study investigated the effects of the β-mannanase enzyme and soyhulls on production performance, economics, egg quality, hematology and serum biochemistry, nutrient digestibility, gut morphology, digesta viscosity, and excreta consistency in laying hens during the late peak production phase (37 to 40 weeks of age). Golden brown hens (RIR × Fayoumi; n = 200) were fed a control diet (no soyhulls or enzymes) and diets containing four combinations, i.e., 3% soyhulls with 20 mg/kg β-mannanase (D1), 3% soyhulls with 30 mg/kg β-mannanase (D2), 9% soyhulls with 20 mg/kg β-mannanase (D3), and 9% soyhulls with 30 mg/kg β-mannanase (D4), for four weeks in four replicates of 10 birds each. Overall, a significantly higher (p < 0.05) feed intake, weight gain, feed conversion ratio, and water intake were calculated in the D2 group as compared to the control and remaining combinations of soyhulls and β-mannanase. No mortality was recorded during the entire experiment. Economically, the D1 and D2 groups showed the best results as compared to the D3 and D4 groups. Egg quality parameters like egg weight, shell weight and shell thickness, yolk weight, albumen weight and height, and the Haugh unit remained unchanged (p > 0.05). Similarly, the D2 group showed significantly lower total cholesterol, LDL, and VLDL levels and enhanced gut morphology with greater villus width, height, crypt depth, and surface area across intestinal segments. Crude protein (CP), crude fiber (CF), crude fat, and ash digestibility were higher (p < 0.05) in the D1 and D2 groups compared to the control. Digesta viscosity, excreta consistency, and other egg quality parameters remained unaffected. In conclusion, the dietary inclusion of a combination of 3% soyhulls and 30 mg/kg β-mannanase may have potential benefits for laying hens by improving some production performance and egg quality indicators and economics, lowering blood cholesterol, LDL, and VLDL levels, enhancing nutrient digestibility, and improving gut morphology without affecting egg quality.
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