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Influence of three microbial feed additives of Megasphaera elsdenii, Saccharomyces cerevisiae and Lactobacillus spp. on ruminal methane and carbon dioxide production, and biofermentation kinetics.

Abstract：

AIMS:This study was performed to investigate the effects of Megasphaera elsdenii (Me), Saccharomyces cerevisiae (SC) and lactic acid bacteria (FP - Lactobacillus fermentum plus Lactobacillus plantarum) alone or in combination on biogas production and ruminal biofermentation parameter in a heterofermenter system. METHODS AND RESULTS:To achieve this purpose, 8 treatments were studied; (1) control (without additive; CON); (2) Me; (3) SC; (4) FP; (5) Me plus SC (MSC); (6) Me plus FP (MFP); (7) SC plus FP (SCFP) and (8) Me plus SC plus FP (MSCFP). Doses of FP, Me and SC were 1.5×108 (CFU ml-1 ), 1.5×108 (CFU ml-1 ) and 1.4×107 (CFU 0.002 g-1 ), respectively. Biogas production in all time increased (P < 0.05) by MSCFP than CON additive. The proportional methane (CH4 ) decreased (P < 0.05) in MSCFP and FP, while carbon dioxide (CO2 ) was decreased (P < 0.05) by SC compared MSCFP and MSC additive. The proportional CO2 decreased (P < 0.05) by MSCFP and FP additive. The highest (P < 0.05) value of ruminal pH was observed in MFP additive. The mean concentration of ammonia-N was not affected by treatments. The concentration of total volatile fatty acids (TVFA) and the percent of acetate and propionate was not affected by treatments. The highest (P < 0.05) percent of butyrate and valerate were observed in MSCFP additive. The experiment showed that microbial additives of FP, SCFP and MSCFP reduced proportional CH4 and CO2 . CONCLUSIONS:Microbial additives of MFP and MSCFP had a sustainable positive efficiency on pH and volatile fatty acids and mitigate CH4 and CO2 . SIGNIFICANCE AND IMPACT OF THE STUDY:The use of microbial additives control on the ruminal pH (MFP) and improve VFA such as butyrate (MSC, MSCFP) and valerate (MSCFP) and reduce the greenhouse gases emission showed a reduced risk of ruminal acidosis.

journal_name

J Appl Microbiol

journal_title

Journal of applied microbiology

authors

Direkvandi E,Mohammadabadi T,Salem AZM

doi

10.1111/jam.14990

subject

Has Abstract

pub_date

2021-01-07 00:00:00

eissn

1364-5072

issn

1365-2672

pub_type

杂志文章

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Influence of three microbial feed additives of Megasphaera elsdenii, Saccharomyces cerevisiae and Lactobacillus spp. on ruminal methane and carbon dioxide production, and biofermentation kinetics.