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Gypsum Effect on Nitrogen Mineralization and Ammonia Volatilization from Broiler Litter
Author(s) -
Mishra Archana,
Cabrera Miguel L.,
Kissel David E.,
Rema John A.
Publication year - 2013
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj2013.04.0142
Subject(s) - broiler , gypsum , litter , environmental science , ammonia volatilization from urea , poultry litter , volatilisation , agronomy , zoology , chemistry , environmental chemistry , fertilizer , nutrient , biology , paleontology , organic chemistry
Broiler litter is commonly surface applied to grasslands as fertilizer in the southeastern United States. Surface application may lead to losses of P in surface runoff and to losses of N through NH 3 volatilization. Adding gypsum to broiler litter can reduce water‐soluble P and, therefore, the potential for surface water contamination, but no information is currently available on the effect of gypsum on NH 3 volatilization when broiler litter is applied to soil. We conducted three laboratory studies to evaluate the effect of adding flue‐gas desulfurization (FGD) gypsum to broiler litter or soil on NH 3 volatilized and N mineralized. In two studies, soil with or without 0.01 g FGD gypsum g −1 soil was packed into acrylic columns and broiler litter with or without 0.25 g FGD gypsum g −1 litter was applied on the soil surface and incubated at 25°C for 15 d. In a third study, litter with or without 0.25 g FGD gypsum g −1 litter was mixed with soil and incubated at 25°C for 63 d. Our results showed that the addition of FGD gypsum to broiler litter or soil did not affect net N mineralized or NH 3 volatilized when litter was surface applied. Similarly, the addition of FGD gypsum to broiler litter did not affect net N mineralized when broiler litter was incorporated into soil. Thus, the addition of FGD gypsum at these rates does not change NH 3 loss or N mineralized from broiler litter.