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Effects of Yucca schidigera based additive on in vitro dry matter digestibility, efficiency of microbial production, and greenhouse gas emissions.

X. L. Crumel

Abstract:

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Effects of Yucca schidigera based additive on in vitro dry matter digestibility, efficiency of microbial production, and greenhouse gas emissions.
X. L. Crumel*1, D. P. Compart2, U. Y. Anele1. 1North Carolina Agricultural and Technical State University Greensboro, NC, 2PMI Arden Hills, MN.

Two in vitro batch culture experiments were conducted to evaluate the effects of Saport Feed Additive (Saport, PMI, Arden Hills, MN), a Yucca schidigera based feed additive, on in vitro dry matter digestibility (IVDMD), short chain fatty acids, microbial mass, efficiency of microbial production and greenhouse gas emissions. In experiment 1, 7 concentrations of Saport were evaluated using alfalfa hay and a concentrate diet to determine the optimum dose to use in experiment 2. The concentrations were 0 (control), 0.5, 1, 2, 4, 6, 8 g/head/day. Based on the results, 2 g/head/day was selected for experiment 2. For the second batch culture study, 4 dairy diets (2 corn silages and 2 TMR; collected from different farms in Guilford county, NC) were used as substrates and incubated for 3, 6 and 24 h using rumen fluid from 2 ruminally cannulated dairy cows. Treatments were 0 (control) and 2 g/head/day of Saport. Inclusion of Saport had no effect (P = 0.7869) on both apparently and truly degraded DM. Additionally, Saport had no effect (P > 0.05) on short chain fatty acids, microbial mass and efficiency of microbial production. Methane production was reduced by 22.7% with Saport inclusion and this was consistent among the 4 diets. Similarly, lower (P = 0.0132; 18%) carbon dioxide concentration was observed in Saport treatment. Ammonia and hydrogen sulfite concentrations were similar (P > 0.05) for both treatments. However, Saport inclusion at 2 g/head/day did reduce ammonia and hydrogen sulfite concentrations by 13 and 17%, respectively. Regardless of diet type, inclusion of Saport at 2 g/head/day reduced methane and carbon dioxide concentrations. The reduction in greenhouse gas emissions did not result in any increase in either short chain fatty acids, microbial mass or efficiency of microbial production.

Keywords: batch culture, greenhouse gases, Yucca schidigera.

Biography: I am Xavier Crumel and I am a Sophomore undergraduate student at North Carolina Agricultural and Technical State University. I have been working in the Ruminant Nutrition Lab since my freshman year as an undergraduate research assistant. Since then, I have risen to the undergraduate coordinator in the lab. I have been involved in several studies on using feed additives to improve feed efficiency and reduce greenhouse gases in ruminants. After graduating, I plan to attend vet school at North Carolina State University.