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Assessing refrigerating and freezing effects on the biological/chemical composition of two livestock manures

Pratt, Chris and Redding, Mathew and Hill, Jaye and Mudge, Stephen Rowland and Westermann, Maren and Paungfoo-Lonhienne, Chanyarat and Schmidt, Susanne (2014) Assessing refrigerating and freezing effects on the biological/chemical composition of two livestock manures. Agriculture, Ecosystems & Environment, 197 . pp. 288-292. ISSN 0167-8809

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Publisher URL: http://www.sciencedirect.com/science/article/pii/S0167880914004022

Abstract

Assessing storage impacts on manure properties is relevant to research associated with nutrient-use efficiency and greenhouse gas (GHG) emissions. We examined the impact of cold storage on physicochemical properties, biochemical methane-emitting potential (BMP) and the composition of microbial communities of beef feedlot manure and poultry broiler litter. Manures were analysed within 2 days of collection and after 2 and 8 weeks in refrigerated (4 °C) or frozen (–20 °C) storage. Compared with fresh manure, stored manures had statistically significant (p < 0.05) but comparatively minor (<10%) changes in electrical conductivity, chloride and ammonium concentrations. Refrigeration and freezing did not significantly affect (p > 0.05) BMP in both manure types. We did not detect ammonium- or nitrite-oxidising bacterial taxa (AOB, NOB) using fluorescence in situ hybridisation (FISH). Importantly, the viability of microbes was unchanged by storage. We conclude that storage at –20 °C or 4 °C adequately preserves the investigated traits of the studied manures for research aimed at improving nutrient cycling and reducing GHG emissions.

Item Type:Article
Business groups:Animal Science
Keywords:BMP FISH Freezing GHG Livestock manure Nutrient Refrigeration Storage
Subjects:Animal culture
Agriculture > Agriculture (General) > Agricultural meteorology. Crops and climate
Deposited On:20 Jan 2015 03:28
Last Modified:04 Oct 2016 00:28

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