Abstract

The objective of the present study was to evaluate the effect of supplementing low nutrient density diet of growing pigs with probiotics complex on growth performance, nutrient digestibility, faecal microbial, and faecal noxious gas emission. A total of 140 crossbred female and castrated male healthy growing pigs [(Yorkshire × Landrace) × Duroc, 54 days of age] with an average initial body weight (BW) of 24.39 ± 2.58 kg were used in a 42-day trial. All pigs were randomly allotted to one of four treatment diets based on initial BW and sex (seven replicate pens/treatment; two gilts, and three barrows/pen). Dietary treatments were: (i) HD, high nutrient density diet, (ii) LD, low nutrient density diet, (iii) T1, LD + 0.05% probiotics. (iv) T2, LD + 0.10% probiotics. At the end of the experiment BW, average daily gain (ADG), and gain: feed ratio (G: F) tended to be higher (p < .1) in HD diet compared with LD treatment. However, supplementation of probiotics complex to LD diet showed a comparable effect as that of HD diet. There were no differences (p > .05) in average daily feed intake (ADFI), backfat thickness, lean meat percentage, and apparent total tract digestibility (ATTD) of dry matter (DM), nitrogen (N), and energy among the treatments. The supplementation of probiotics complex to LD diet increased (p < .05) faecal Lactobacillus counts and reduced NH₃ gas emission compared with the LD diet. In conclusion, the results of this study demonstrated the beneficial effects of the probiotics complex supplementation on growth performance, faecal Lactobacillus concentration, and faecal NH₃ emission in LD diet suggesting.

• Highlights

• To evaluate the effects of supplementing low nutrient density diet with 2 levels (0.05%, 0.1%) of probiotics complex (Bacillus subtilis ms1, Bacillus licheniformis SF5-1, and Saccharomyces cerevisiae) in growing pigs.

• Probiotics complex supplementation has shown the beneficial effects on growth performance.

• The supplementation of probiotics complex to low nutrient density diets increased (p < .05) faecal Lactobacillus counts and reduced NH3 gas emission.

• The probiotics of B. subtilis ms1, B. licheniformis SF5-1, and S. cerevisiae complex may be a helpful alternative to antibiotics.

摘要

本研究的目的是评估在生长猪的低营养密度日粮中添加益生菌复合物对生长性能，营养物质消化率，粪便微生物和粪便有害气体排放的影响。在42天的试验中，总共使用了140头雌性和去势雄性健康成年猪（（约克郡×长白）×杜洛克，54天龄），平均初始体重（BW）为24.39±2.58 kg。根据初始体重和性别，将所有猪随机分配到四种治疗日粮中的一种（七只重复笔/处理；两只小母猪和三只公猪/笔）。饮食治疗包括：（i）高营养高密度饮食，（ii）低营养低密度饮食，（iii）T1，LD + 0.05％益生菌。（iv）T2，LD + 0.10％益生菌。在实验结束时，体重，平均日增重（ADG）和增重：饲料比例（G： 与LD治疗相比，HD饮食中的p <.1）。但是，向LD饮食补充复合益生菌的效果与HD饮食相当。 平均日采食量（ADFI），背脂厚度，瘦肉率和干物质（DM），氮（N）和能量的表观总道消化率（ATTD）之间没有差异（p > .05）。治疗。与LD日粮相比，向LD日粮添加益生菌复合物可增加（p  <.05）粪便乳酸菌计数，并减少NH ₃气体排放。总之，这项研究的结果证明了补充益生菌复合物对粪便乳酸杆菌生长性能的有益作用。浓度和LD饮食中粪便NH _3的排放暗示。

• 强调

• 为了评估在生长猪中添加2种水平（0.05％，0.1％）的益生菌复合物（枯草芽孢杆菌ms1，地衣芽孢杆菌SF5-1和酿酒酵母）来补充低营养密度日粮的效果。

• 益生菌复合物补充剂已显示出对生长性能的有益作用。

• 在低营养密度的饮食中添加益生菌复合物可增加（p  <.05）粪便乳酸杆菌计数并减少NH3气体排放。

• 枯草芽孢杆菌ms1，地衣芽孢杆菌SF5-1和酿酒酵母复合物的益生菌可能是替代抗生素的有用方法。