Got odor? Mixed bedding material may reduce smell
By Marg Land
November 15, 2017 – Livestock facilities can be odorous, including systems that manage beef cattle on deep-bedded pack.
Based on the results of past research, bedding mixtures containing pine shavings produce less odors and have lower levels of total E. coli compared to bedding mixtures containing other crop- and wood-based materials. Unfortunately, availability and affordability may limit the use of pine bedding in beef deep-bedded facilities.
But recent research from the U.S. Department of Agriculture’s Agricultural Research Service has found that some odor relief is possible if pine bedding is mixed with readily available and affordable corn stover bedding.
During the study, mixtures of bedding materials, containing zero, 10, 20, 30, 40, 60, 80, and 100 percent pine chips combined with corn stover, were tested over a seven-week period for odor generation and presence of E. coli. Results showed that including even 10 percent pine chips in the mixture lowered the concentration of skatole, a highly odorous compound emitted from livestock waste. When 100 percent pine chips were used, skatole was reduced by 88 percent compared to using corn stover alone. Including greater than 60 percent pine chips in the mixture increased the concentration of odorous sulfur compounds up to 2.4 times compared to corn stover.
Bedding material did not affect E. coli.
Researchers are suggesting a bedding material mixture that contains 30 to 60 percent pine and 40 to 70 percent corn stover may be the ideal combination to mitigate odorous emissions from livestock facilities using deep-bedded systems.