FQ15 enterococcus faecalis and method for producing somatotrophic feed additive with the bacteria

Abstract

The invention discloses an FQ15 enterococcus faecalis and a method of a feed additive which uses the bacteria production for promoting the growth: an MRS culture medium is taken as a seed culture medium, and the FQ15 enterococcus faecalis is cultured under the aerobic or facultative condition at 30 to 45 DEG C for 4 to 24 hours, so as to become a grade one seed; the grade one seed liquid is inoculated in a seed tank for amplification culture, the MRS culture medium is adopted as the seed culture medium, and the culture is carried out for 4 to 24 hours under the aerobic or the facultative condition at 30 to 45 DEG C to become a grade two seed; the grade two seed liquid is inoculated in a fermentation tank for fermentation culture, an improved MRS culture medium is adopted as the fermentation culture medium, and the culture is carried out for 8 to 36 hours by using timing or continuous fed-batch fermentation mode under the aerobic or the facultative condition at 30 to 45 DEG C; the obtained fermentation liquid is sub-packaged or the fermentation liquid which is obtained by step c is separated, 1 to 25 percent drying protector is added in the bacterial sludge, and the granulation at 20 - 80 DEG C, freeze-drying or spray drying are adopted. The invention has the advantages that the invention can substitute the feed antibiotics and improve the high efficient weight increase of livestock and poultry; the production process is simple; the cost is low, etc.

Description

Technical field:

[0001] The invention relates to a feed (feed, drinking water) additive, in particular to a production method of a growth-promoting feed additive which can replace feed antibiotics, promote high-efficiency weight gain of livestock and poultry, simple production process and low cost. Background technique:

[0002] With the adjustment of my country's agricultural breeding structure, large-scale and group farming has become a development trend. In order to maximize economic benefits, farmers add feed antibiotics, hormones and probiotic preparations to the feed to promote animal weight gain and purpose of rapid growth.

[0003] Adding growth-promoting feed antibiotics and other drugs throughout the breeding period can inhibit and kill the growth and reproduction of intestinal microorganisms in livestock and poultry. On the one hand, it weakens the effective stimulation of intestinal microbes to the epithelial cells of the intestinal wall, inhibits the development...

Images