Sunday, 5 February 2006

This presentation is part of: Soils Posters

Determination of Bioavailable Nitrogen and Phosphorus from Broiler Litter.

W. Ashley Hammac II, C. Wesley Wood, Yucheng Feng, Oladiran Fasina, Joey Shaw, and Brenda Wood. Auburn University, 102 Kingswood Drive, Daphne, AL 36526

Improved methods for broiler chicken (Gallus gallus domesticus) litter disposal are needed to alleviate potential impacts of pollution around broiler production operations. Pelletization may constitute one improved method for handling broiler litter. A study was performed to measure bioavailable nitrogen (N) and phosphorus (P) from pelletized broiler litter in the greenhouse. Annual ryegrass (Lolium multiflorum Lam.) and sorghum sudangrass (Sorghum bicolor L. Moench) were grown to determine dry matter accumulation and uptake of N and P. Cumulative uptake data for all three cuttings showed that use of pelletized broiler litter caused a decline in uptake of N and P in comparison to reagent grade N and P(R2 = 0.95 and 0.86). Yield data showed a decline in dry biomass production from the use of pellets when compared to NH4NO3 for the N experiment (R2 = 0.91), but biomass production from the use of pellets was similar to that of CaHPO4 for the P experiment (R2 = 0.65). These findings indicate that pelletization followed by land application of broiler litter could serve as an effective alternative in the disposal of broiler litter, while not compromising its nutritive value.

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