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Changes in soil test phosphorus from broiler litter additions

Leytem, A.B. and Sims, J.T. (2007) Changes in soil test phosphorus from broiler litter additions. Communications in Soil Science and Plant Analysis. 36:2541-2559.

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Nutrient surpluses on the Delmarva Peninsula have led to a continual accumulation
of soil test phosphorus (STP), a potential source for transport of phosphorus (P)
to surface waters. This article examines the effects of initial soil test P concentrations
and broiler litter additions on STP accumulation. Broiler litter (BL) was applied at
rates of 0, 2.5, 5, 7.5, and 10 g kg -1 (dry weight) to three soils: an Evesboro sandy
loam (Mesic, coated Typic Quartzipsamments), a Pocomoke sandy loam (coarseloamy,
siliceous, thermic typic Umbraquults), and a Matapeake silt loam (fine-silty,
mixed, semiactive, mesic Typic Hapludults). Soils and BL were incubated for 16
weeks with subsamples analyzed after 4 and 16 weeks. There was a linear increase in
STP (Mehlich-3), water-soluble P (WS-P), iron-oxide strip-extractable P (FeO-P), and
Mehlich-3 phosphorus saturation ratio (M3-PSR) with broiler litter additions. Regression
analysis indicated few significant differences in STP response to added BL between soils
within the same soil group having different initial STP levels. Correlation analysis and
stepwise regression indicated that increases in WS-P and FeO-P from added BL were
more closely related to the degree of P saturation of the soil rather than traditional STP
measurements. Therefore, decisions regarding manure placement within a watershed
should be based on the potential P sorption capacity of the soil as well as potential P
transport pathways when the goal is the reduction of P transfer to waterbodies.

Item Type: Article
NWISRL Publication Number: 1213
Subjects: Manure > Chemistry
Soil > Chemistry > Phosphorous
Mass Import - autoclassified (may be erroneous)
Depositing User: Users 5 not found.
Date Deposited: 20 Nov 2010 21:49
Last Modified: 01 Nov 2016 15:00
Item ID: 52