Abstract: 120 piglets of 21-day-old pigs were selected and divided into four groups, which were fed with basal diets supplemented with 0.00%, 0.05%, 0.10%, and 0.15% active yeast. This study was designed to investigate the effect of high-activity dry yeast on the performance of weaned piglets and the appropriate amount of yeast in the piglet diet. The results showed that the 0.10% yeast addition group had the best effect.
Key words: high activity dry yeast; weaned piglets
1 test design
1.1 test animals
A total of 120 weaned piglets of 21 days old were selected and randomly divided into 4 groups with 6 replicates in each group and 5 pigs in each replicate.
1.2 Test methods
Feed the basal diet according to US NRC standards. In the control group, the diet was supplemented with 0.00% active yeast, and the experimental group 1, 2, and 3 were fed with basal diet supplemented with 0.05%, 0.10%, and 0.15% active yeast. The experimental yeast is a highly active dry yeast supplied by Bonsford, and the number of viable cells per gram of the sample is more than 20 billion.
The test period was 21 days. During the test period, piglets were given free access to food and water, and were immunized and managed according to normal procedures.
1.3 Measurement indicators
The daily gain and the feed digestibility were measured, and the body weight was measured on the 10th day and the 21st day, respectively, for calculating the average daily gain and the feed digestibility.
The test data was processed and analyzed using EXCEL and SPSS software.
2 test results
Table 1. Effect of adding different levels of active yeast on growth performance of weaned piglets
Control group | 0.05% yeast group | 0.10% yeast group | 0.15% yeast group | |
First 10d | ||||
Average daily feed intake / g | 197±22.22 | 223±28.53 | 217±18.23 | 207±12.27 |
Average daily gain / g | 108±23.07 | 107±23.04 | 115±25.69 | 98±38.87 |
Material to weight ratio | 1.82±0.25 | 1.99±0.38 | 1.89±0.37 | 2.11±0.40 |
After 11d | ||||
Average daily feed intake / g | 399±45.60 | 458±28.66 | 474±2.31 | 461±21.30 |
Average daily gain / g | 287± | 342±51.23b | 346±25.63b | 339±69.12b |
Material to weight ratio | 1.39±0.39 | 1.34±0.56 | 1.37±0.10 | 1.36±0.12 |
Full period | ||||
Average daily feed intake / g | 303±36.98 | 344±45.22 | 352±52.31 | 338±66.11 |
Average daily gain / g | 202±27.46 | 230±47.93 | 226±26.14 | 224±36.21 |
Material to weight ratio | 1..50±0.23 | 1.50±0.16 | 1.49±0.02 | 1.51±0.17 |
Diarrhea rate% | 8.36± | 2.95±0.06b | 3.82±0.14b | 3.15±0.04b |
Note: Different lowercase letters on the same line shoulder mark indicate significant difference
The results showed that the active yeast significantly improved the performance of piglets. The yeast group 1, group 2 and group 3 increased by 19.2%, 20.6% and 18.1%, respectively, and the yeast 2 group increased the weight. In the early stage of the experiment, although the yeast group improved the production performance compared with the control group, the difference was not significant. The diarrhea rate in the control group was significantly higher than that in the yeast group, indicating that the yeast can regulate the intestinal tract and reduce the incidence of diarrhea.
3 Discussion
The 0.10% high activity dry yeast addition group had the best effect in this experiment. From the large number of literatures at home and abroad, the effect of active yeast on piglets is different, which may be caused by different feeding environment, diet composition, yeast type and addition amount. BSF-high-activity dry yeast is rich in protein, nucleic acid, vitamins and various enzymes, which can increase the palatability of feed, increase feed intake, enhance digestion and absorption, and thus improve the performance of piglets. Highly active yeast is a natural green feed additive that is not tolerated by livestock and poultry itself, and studies have shown that the addition of antibiotics to the diet does not affect the efficacy of the yeast.
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