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- W1565975501 abstract "Amendments can be practical and cost-effective for reducing ammonia [NH 3 ] and greenhouse gas [GHG] emissions from dairy manure. In this study, the effect of 22 amendments on NH 3 and GHG carbon dioxide [CO 2 ], methane [CH 4 ] and nitrous oxide [N 2 O] emissions from dairy manure were simultaneous investigated at room temperature (20 ℃ ). Dairy manure slurry (2 kg; 1:1.7 urine: feces; 12% total solids) was treated with various amendments, representing different classes of product, following the suppliers’ recommended rates. In this screening of products, one sample of each amendment was evaluated along with untreated manure slurry with repeated measurements over 24 h. Gas emissions were measured after short (3 d) and medium (30 d) storage duration using a photoacoustic multi-gas analyzer. Six amendment products that acted as microbial digest, oxidizing agent, masking agent or adsorbent significantly reduced NH 3 by >10% ( P = 0.04 to <0.001) after both 3 and 30 d. Microbial digest/enzymes with nitrogen substrate appeared effective in reducing CH 4 fluxes for both storage times. Most of the masking agents and disinfectants significantly increased CH 4 in both storage periods ( P = 0.04 to <0.001). For both CH 4 and CO 2 fluxes, aging the manure slurry for 30 d significantly reduced gas production by 11 to 100% ( P <0.001). While some products reduced emissions at one or both storage times, results showed that the ability of amendments to mitigate emissions from dairy manure is finite and re-application may be required even for a static amount of manure. Simultaneous measurement of gases identified glycerol as a successful NH 3 reduction agent while increasing CH 4 in contrast to a digestive-microbial product that significantly reduced CH 4 while enhancing NH 3 release. Keywords: m ethane, greenhouse gas, emission, amendment, additive, dairy manure, ammonia, mitigation" @default.
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- W1565975501 date "2011-06-28" @default.
- W1565975501 modified "2023-09-27" @default.
- W1565975501 title "Manure amendments for mitigation of dairy ammonia and greenhouse gas emissions: preliminary screening" @default.
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