Organic and Inorganic Amendments to Reduce Ammonia Losses from Liquid Hog Manure
1992
Al-Kanani, T. | Akochi, E. | MacKenzie, A. F. | Alli, I. | Barrington, S.
Liquid hog manure (Sus scrofa domesticus) is in common use as a fertilizer or a soil conditioner in agricultural production. Liquid hog manure (LHM) suffers from N loss through volatilization of ammonia (NH₃), however. Reduction of NH₃ loss from 4% total solids LHM was studied using added Sphagnum peat moss (Sphagnum fuscum peat), sulfuric acid, phosphoric acid, monocalcium phosphate monohydrate (MCPM), elemental S, and calcium carbonate. Cumulative losses of NH₃-N ranged between 0 and 711 mg N kg⁻¹ LHM applied. Elemental Sulfur and calcium carbonate (CaCO₃) treatments induced greater NH₃ losses compared with the nonamended LHM, whereas acidic treatments including Sphagnum peat moss (SM) reduced NH₃ losses by at least 74.6%. Volatilization of NH₃ from LHM increased as the pH of amended LHM treatment increased. The relationships between cumulative (15 d) NH₃ volatilized and initial pH of amended LHM varied, depending on the amendment. The nutrient values of amended LHM stored for 25 d under continuous aeration were assessed on two soils mapped as Chicot (fine loamy, mixed, nonacid, mesic Typic Hapludoll) and Uplands (coarse loamy, mixed, nonacid, Typic Haplorthod) from eastern Canada. Treatment of LHM with SM at greater than 1% (w/w) reduced NH₃ volatilization. Added CaCO₃ increased NH₃ loss. In general, amendments did not reduce effectiveness of LHM-N for barley (Hordeum vulgare L.) growth. An exception was the 1% SM + 2% CaCO₃ amendment that reduced plant growth. Supported by grant from the Ministere de l'Environment du Quebec.
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