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Home > Iowa Academy of Science > Proceedings of the Iowa Academy of Science > Volume 77 (1970) > Annual Issue
Research
A comparison of the effects of spraying with DDT, Sevin or water on litter decomposition and litter fauna was made, using a litter bag method. During the thirteen week experimental period no significant differences were found between the rate of decomposition in the litter receiving the three different treatments. Twenty-four hours after spraying the number of Collembola was greatly reduced in the Sevin treated plots. At the end of the experimental period the reduction of fauna other than mites or Collembola was significant at the .01 level as compared to the effects of Sevin or water.
1970
Proceedings of the Iowa Academy of Science
77
1
219
222
©1970 Iowa Academy of Science, Inc.
en
application/pdf
Bodtker, Diana J. and Kingsbury, Phyllis J. (1970) 'The Effects of DDT and Sevin on Litter Decomposition and Litter Fauna,' Proceedings of the Iowa Academy of Science, 77(1), 219-222.
Available at: https://scholarworks.uni.edu/pias/vol77/iss1/33
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Poster
2021
Broiler chicken (Gallus gallus domesticus) production is one of the largest agricultural sectors in the state of Georgia. Broiler litter produced by broiler facilities is rich in organic nitrogen (N), specifically urea, which can be mineralized by poultry litter urease-producing bacteria (PLUP) forming ammoniacal-N (NH3/NH4+). A large portion of NH3/NH4+ can be lost as ammonia (NH3) gas, which negatively impacts bird health and profitability. The release of NH3 from litter is strongly influenced by the pH of the litter. Flue-gas desulfurization gypsum (FGDG) has been suggested as a potential amendment to reduce NH3 volatilization from broiler litter due to the pH buffering capacity of calcium carbonate (CaCO3) precipitation. However, its effect on litter pH is not as pronounced as acidifying agents, such as aluminum sulfate (alum). The main objective of the present study was to develop an acidified-FGDG amendment that has a more pronounced effect on litter pH and NH3 volatilization than FGDG alone. We conducted a 33-d incubation in which litter pH, NH3 volatilization, PLUP-ureC gene abundance, and CaCO3 precipitation were measured. Treatments in the study included: broiler litter (control) (BL), broiler litter + 20% FGDG (BL+FGDG), broiler litter + FGDG-alum mixture (BL+FGDG+A6), broiler litter + 6% alum (BL+A6), and broiler litter + 10% alum (BL+A10). Our results indicated that ammending broiler litter with the FGDG+alum decreased litter pH (0.68 pH units) and PLUP-ureC gene abundance (> 1 log) compared to FGDG alone and the control (p< 0.05). This led to a 25% decrease in cumulative NH3 loss after 33 d. The addition of FGDG alone did not have an effect on litter pH (p = 0.36) or cumulative NH3 loss (p = 0.29) due to a lack of significant CaCO3 precipitation. Alum 6% and 10% were the most effective amendment for reducing cumulative NH3.
Chapman, Taylor; Burt, Christopher D.; Bachoon, Dave; Cabrera, Miguel L.; and Horacek, Christopher, 'The Effect of an Acidified-Gypsum Mixture on Broiler Litter Urease-Producing Bacteria and Nitrogen Mineralization' (2021). Graduate Research Posters. 13.
https://kb.gcsu.edu/grposters/13
Biology Commons, Environmental Microbiology and Microbial Ecology Commons
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