Skip Navigation LinksHome > April 2009 - Volume 174 - Issue 4 > Soil Phosphorus Dynamics in Response to Poultry Manure Amend...
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Soil Science:
doi: 10.1097/SS.0b013e31819cd25d
Technical Article

Soil Phosphorus Dynamics in Response to Poultry Manure Amendment

Waldrip-Dail, Heidi1; He, Zhongqi2; Erich, Susan M.1; Honeycutt, Wayne C.2

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Manure amendments are an excellent source of phosphorus (P) for crop production; however, animal manures differ in P availability. Poultry manure (PM) contains more stable mineral-associated P than many manures and may act as a longer-term P source when used in crop production. We used sequential fractionation and enzyme hydrolysis to evaluate the short-term effects of incorporating 0, 100, and 200 mg PM Pkg−1 of soil into two Maine soils. Results indicated that most PM P was present in the H2O- and HCl-soluble fractions (1936 and 5956 mg Pkg−1 manure, respectively), and that a large portion of stable organic Pwas present in the HCl fraction (3288 mg kg−1). Poultry manure application resulted in only a transient increase in H2O-Pi, implying rapid transfer to other fractions. A transformation of Pi from the NaHCO3 to the NaOH fraction was observed at Day 84 of the incubation with all treatments, indicating that soil properties influenced PM P dynamics. In the HCl fraction, some organic P became hydrolyzable and a portion was converted to other fractions. Comparing these data with those of a complementary study indicated that P from PM interacted differently with soil than did P from dairy manure. The observation of active interchange of P in different fractions during the incubation indicated that soil amendment with moderate levels of PM does not lead to accumulation of stable P forms and that the large HCl-P fraction (31.1% of total P) unique to PM could act as a source of plant-available P in a short term (e.g., a growing season).

© 2009 Lippincott Williams & Wilkins, Inc.


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