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Decreasing Phosphorus Runoff Losses from Land-Applied Poultry Litter with Dietary Modifications and Alum Addition

Douglas R. Smitha,*, P. A. Moore, Jr.b, D. M. Milesd, B. E. Haggardc and T. C. Danielb

a 275 South Russell Street, West Lafayette, IN 47907
b 115 Plant Science, University of Arkansas, Fayetteville, AR 72701
c 203 Engineering Hall, University of Arkansas, Fayetteville, AR 72701
d Waste Management and Forage Research Unit, USDA-ARS, PO Box 5367, Mississippi State, MS 39762-5367



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  		Fig. 1. Effect of dietary modification and alum litter treatment on (A) litter total P and (B) litter dissolved reactive phosphorus (DRP). Bars with different letters are significantly different at P < 0.05. Means separation performed using Fisher's protected LSD. HAP, high available phosphorus.

 


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  		Fig. 2. Dissolved reactive phosphorus (DRP) from (A) the first runoff event and (B) the mean of all three runoff events resulting from application of poultry litter treated with dietary modification and/or alum additions to litter. Bars with different letters are significantly different at P < 0.05. Means separation performed using Fisher's protected LSD. HAP, high available phosphorus.

 




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