Study On Application Of Bacillus Subtilis Preparation And Organic Selenium In Rabbit Production

Selenium (Se) is an essential trace element for anti-oxidation, anti-stress, improving animal growth, improving foodstuff utility value, improving immunity, reducing animal death rate etc. There is wide use of organic Se instead of inorganic Se in animal diet, because organic selenium has advantage of higher bioavailability, lower toxicity and less potential environmental pollution.Probiotics are beneficial microorganisms for improving the beneficial microorganisms growth, balance of colonic microbiota, secretion of digestive enzyme, improving absorption of nutrient, increasing foodstuff utility value, improving immunity and ability of anti-disease, reducing animal death rate etc. There has been wide use as additive.In this paper, selenomethionine, selenium-enriched yeast and Bacillus subtilis were used as additive to study its effect on growth performance, enhancing immunity and preventing diseases on rabbit, and to clarify its mechanisms.Experiment1. The effect of different concentrations of Bacillus subtilis on rabbit growth performance, stool microflora and antioxidation function324chosen rabbits were divided into3groups randomly. The rabbit in the control groups I were fed with normal diet, the rabbits in the experimental groups II were fed normal diet with0.3%Bacillus subtilis, the rabbits in the experimental groups III were fed normal diet with0.6%Bacillus subtilis. The experimental period was60days. Results suggest that feeding with Bacillufeed significantly increased day weight gain and feed conversion; significantly increased dressing percentage and meat percentage;reduced the water loss in weight after cold storage; reduced mortality. Rabbit cage of three floors have extreme effect on mortality; significantly reduced stool pH.microflora and Escherichia coli,significantly increased Bifidobacterium and Lactobacterium; significantly improved antioxidation function.Experiment2. The effect of different selenium resources on rabbit growth performance and antioxidation function 432chosen rabbits were divided into4groups randomly. The rabbit in the control groups â…  were fed with normal diet, the rabbits in the experimental groups â…¡ were fed normal diet with0.3mg/kg sodium selenite,the rabbits in the experimental groups â…¢ were fed normal diet with0.3mg/kg Se-enriched yeast, the rabbits in the experimental groups â…£ were fed normal diet with0.3mg/kg Selenomethionine. The experimental period was60days. Results suggest that feeding with sodium selenite, Se-enriched yeast and Selenomethionine significantly increased feed conversion, extreme increased day weight gain; significantly increased dressing percentage;extreme reduced the water loss in weight after cold storage; reduced mortality; Rabbit cage of three floors have an extreme effect on mortality. Significantly increased selenium content in rabbit Pectoralis muscles and Liver; Significantly improved antioxidation function.Experiment3. The effect of Bacillus Subtilis and selenomethionine on rabbit growth performance, stool microflora and antioxidation function432chosen rabbits were divided into4groups randomly. The rabbit in the control groups â…  were fed with normal diet, the rabbits in the experimental groups â…¡ were fed normal diet with0.3%Bacillus Subtilis.the rabbits in the experimental groups III were fed normal diet with0.3mg/kg Selenomethionine, the rabbits in the experimental groups IV were fed normal diet with0.3%Bacillus Subtilis and0.4%Bacillus Subtilis. The rabbits in the experimental groups IV were fed normal diet with0.3mg/kg Selenomethionine and0.3%Bacillus Subtilis. The experimental period was60days. Results suggest that feeding with Selenomethionine significantly increased day weight gain and feed conversion; the mix groups significantly increased day weight gain, dressing percentage and meat percentage extreme increased feed conversion and reduced the water loss in weight after cold storage; Bacillus Subtilis and Selenomethionine significantly reduced the water loss in weight after cold storage; Bacillus Subtilis, Selenomethionine and mix group reduced mortality; Rabbit cage of three floors had an significantly effect on mortality; Selenomethionine and mix groupsignificantly increased selenium content in rabbit hind leg muscles and kidney; Bacillus Subtilis, Selenomethionine and mix group significantly reduced stool pH,microflora and Escherichia coli,significantly increased Bifidobacterium and Lactobacterium; significantly improved antioxidation function.Experiment4. The effect of Bacillus Subtilis and selenium-enriched yeast on rabbit growth performance, stool microflora and antioxidation function792chosen rabbits were divided into4groups randomly. The rabbit in the control groups â…  were fed with normal diet, the rabbits in the experimental groups â…¡ were fed normal diet with0.3%Bacillus Subtilis, the rabbits in the experimental groups â…¢ were fed normal diet with0.3mg/kg Se-enriched yeast The rabbits in the experimental groups â…£ were fed normal diet with0.3mg/kg Se-enriched yeast and0.3%Bacillus Subtilis.The experimental period was60days. Results suggest that feeding with Bacillus Subtilis significantly increased feed conversion, Se-enriched yeast and the mix group significantly increased day weight gain and feed conversion; the mix group extreme increased dressing percentage and meat percentage, Bacillus Subtilis and Se-enriched yeast significantly increased meat percentage; Se-enriched yeast and the mix group extreme reduced the water loss in weight after cold storage; Bacillus Subtilis, Se-enriched yeast and the mix group reduced mortality; Rabbit cage of three floors had an extreme effect on mortality; Se-enriched yeast and the mix group significantly increased selenium content in rabbit longissimus dorsi and heart; Bacillus Subtilis, Se-enriched yeast and mix group significantly reduced stool pH, extreme reduced microflora and Escherichia coli, extreme increased Bifidobacterium and Lactobacterium, significantly improved antioxidation function.