Soybean dregs are the scraps of soybean products such as tofu, soy milk, etc., with a crude protein content of up to 28%, crude fiber content of about 6%, and its nutrient content is higher than many dregs, which is a good feed for pigs, chickens, ducks and so on. Soybean dregs after fermentation to feed pigs, do not have to cook, not easy to diarrhea, long storage time, fresh soybean dregs stored 3d after easy to deteriorate, and fermented soybean dregs as long as the seal can be stored for more than 1 month. In order to verify the effect of fermented soybean dregs fed to fattening pigs, this feeding test.

1 materials and methods

1.1 Soybean dregs fermentation method

1000kg of fresh soybean dregs, 80kg of rice bran, 50kg of corn, 2kg of salt, 1 package of Le Bei Feng biofeed fermentation agent, stirred well and then loaded into the fermentation tank compacted and sealed fermentation, can be fed after 3d.

1.2 Feed composition

The control group diet was 30% fresh soybean residue, 50% corn flour, 20% concentrate, and the test group diet was 30% fermented soybean residue, 50% corn flour, 20% concentrate. Because the fresh and fermented soybean dregs contain 70% and 68% water, so the amount in the composition of the ration must be multiplied by 3.5 for the actual material.

2 Results and analysis

Compared with the pigs in the control group, the pigs in the test group showed good spirit, bright coat color, fast feeding speed. The feces were dry and odorless. The average daily weight gain of the experimental group was 69g/head higher than that of the control group, i.e. 12.78% higher, and the feed-to-weight ratio was reduced by 0.37, i.e. the feed utilization rate was increased by 10.36%. Fattening pigs to sell l1 yuan / kg calculation, the test group fattening pigs average gross profit than the control group 22.77 yuan / head, that is, an increase of 12.78%.

3 Conclusion and Discussion

The results of the experiment show that the fermented soybean dregs feeding fattening pigs, can enhance the pigs' appetite, promote growth, reduce material consumption, prevent disease and stop diarrhea, and enhance the resistance to disease, but also reduce the smell of the enclosure; the reason is that the fermented soybean dregs contain a variety of beneficial bacterial flora, which can inhibit the harmful microorganisms in the digestive tract, the establishment of a benign micro-ecological environment, and increase the vitamins and other nutrients to promote the digestion and absorption of nutrients, and discharge of the nutrients, the digestion and absorption of nutrients. The reason is that fermented soybean dregs contain a variety of beneficial bacteria that can inhibit harmful microorganisms in the digestive tract, establish a benign micro-ecological environment, increase vitamins and other nutrients, and promote the digestion and absorption of nutrients. Therefore, the method of feeding pigs with fermented soybean dregs is worthy of reference and utilization by farmers.