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Evaluation of “Struvite” As a P Fertilizer Source for Irrigated Vegetables in the Arid Southwestern U.S.

Poster Number 2321

Wednesday, November 6, 2013
Tampa Convention Center, East Hall, Third Floor

Charlie A Sanchez, Soil, Water, and Environmental Sciences, Maricopa Agricultural Center, University of Arizona, Maricopa, AZ, Trudy Naugler Klassen, Ostara, Vancouver, BC, Canada and Dan Froehlich, Ostara, White Bear Lake, MN
Struvite derived from a proprietary fluidized bed reactor system that recovers ammonia and phosphate from nutrient rich fluids, including waste streams, is a pearl or granule based P fertilizer marketed by as “Crystal Green”.  However, the efficacy of this product as a P fertilizer source on calcareous soils in the southwestern United States was unknown.  Field studies were conducted from 2010 through 2013 comparing this struvite P fertilizer source, against, and in combination with, commonly used commercial P fertilizers (triple superphosphate and mono-ammonium phosphate).  Studies were conducted with lettuce (Lactuca sativa), watermelons (Citrullus lanatus), carrot (Daucus carota), and potato (Solanum tuberosum).  The struvite and the conventional P fertilizers produced similar changes in sodium bicarbonate extractable soil test P levels.  The results of these studies also indicate that this struvite based product produced marketable yield increases to P at least comparable to the conventional P sources.
See more from this Division: SSSA Division: Soil Fertility & Plant Nutrition
See more from this Session: Phosphorus and Potassium Soil Fertility and Management

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