کد مقاله : BSA-001

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A. A. Rodriguez,Y. Acosta Aragon, and E. Valencia

An experiment was conducted to determine the effects of the silage additive Biomin® BioStabil Mays ( BSM, blend of homo- and heterofermentative lactic acid bacteria) on the fermentation characteristics and aerobic stability of corn whole plant (QPM variety) growth and ensiled in Puerto Rico. Corn was harvested 75 d after planting and chopped finely. Prior to ensiling, the vegetative material of the trial group was treated with BSM (1 x 105 cfu/g silage). A control group went untreated. Treatments were applied to weighted portions of corn forage , manually mixed, and packed into PVC laboratory silos. Samples of fresh forage of each treatment were taken at 0,3,45 and 90 d of fermentation ( triplicate silos of each treatment were available), analyzed for PH, chemical composition,

and fermentation products. Statistical analysis was performed as a completely randomized design with a 2by 4 factorial arrangement of treatments. Tukey t-test was used for mean separation. For aerobic stability determination, triplicate silos from each treatment were emptied after 45 and 90 d of ensiling, placed into Styrofoam containers lined with a plastic bag and exposed to air for5 d. Temperature was monitored every 6 hours during the 5 d with a thermometer embedded in the surface of the exposed silage . the pH was measured after 0,1,3 and 5 d . statistical analysis of pH data was performed as a completely randomized design with a 2 by 5 factorial arrangement of treatments. The same model was utilized for temperature data except that 19 times of aerobic exposure (hours) were utilized instead of 5 d. Tukey t-test was used for mean comparison again. BSM enhanced the fermentation characteristics of corn ensiled during 45 d as evidenced by lower pH (p˂0.05) and higher lactic acid content (p˂0.05). after 90 d of fermentation BSM lowered the ratio of NH3-N/total-N(p˂0.05) as compared with corn ensiled without additive. After the opening of the silos at the d 45 and 90 the temperature of silages treated with BSM was lower than that of the control silage (p˂0.05) . in summary, BSM improved the fermentation characteristics and the aerobic stability of corn ensiled under tropical laboratory conditions.