384-7 Using Inorganic Fertilizer to Assist In Removal of Excess Soil Nutrients From Broiler Litter Application In Orchardgrass Soils.

Poster Number 444

See more from this Division: S08 Nutrient Management & Soil & Plant Analysis
See more from this Session: Managing Nutrients In Organic Materials and by-Products: II
Wednesday, October 19, 2011
Henry Gonzalez Convention Center, Hall C
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Rebecca Gilfillen1, Annesly Netthisinghe1, Todd Willian1, Naomi Rowland2 and Karamat Sistani3, (1)Agriculture, Western Kentucky University, Bowling Green, KY
(2)Biology, Western Kentucky University, Bowling Green, KY
(3)USDA-ARS AWMRU, Bowling Green, KY
Broiler litter is often disposed of on lands at rates in excess of forage crop needs.  This often results in an accumulation of some nutrients.  A remediation study was used to determine if inorganic fertilizer use after broiler litter applicaiton would reduce excess soil nutrients by growing orchardgrass (Dactylis glomerata L.).  There were a total of seven treatments with three be remediation based.  Remediation treatments were previous broiler litter applied at the N rate (R-PLN), P rate (R-PLP) P rate with inorganic N (R-PLP+N), and inorganic fertilizer  (INORG).  These were compared to continued broiler litter at the N rate (PLN), P rate (PLP) and P rate with inorgniac N (PLP+N).  Continued application of broiler litter at the N rate led to accumulations of soil P, Cu, and Zn in comparison to initial levels.  By using inorgniac fertilizer application as a remediation, soils can be reduced in P, Cu and Zn levels by 32 mg P kg -1 yr -1, 1.9 mg Cu kg -1 yr-1, and 2.4 mg Zn kg -1 yr -1.  Indications are that removal of these nutrients may require in excess of five years, but will allow for excellent forage production during the remediation process.  
See more from this Division: S08 Nutrient Management & Soil & Plant Analysis
See more from this Session: Managing Nutrients In Organic Materials and by-Products: II