Aerating grassland before manure application reduces runoff nutrient loads in a high rainfall environment

Journal of Environmental Quality
L J P van VlietC G Kowalenko

Abstract

The effect of mechanically aerating grassland before liquid manure application in the fall on surface runoff and transport of nutrients and solids was studied in a high rainfall area. The two treatments were control and aeration, the latter receiving one pass with an aerator perpendicular to the slope before fall application of liquid manure (dairy in Years 1-3 and swine in Year 4). Treatments were randomly assigned on 3 to 5% sloping land with a silt loam surface soil (Aquic Dystroxerept) planted in orchardgrass (Dactylis glomerata L.). Runoff from natural rainfall events was sampled for nutrient and solids analysis. Aeration significantly reduced runoff and loads of suspended solids, total Kjeldahl N (TKN), and dissolved reactive P in all years. Annual runoff amounts were reduced by 47 to 81%, suspended and volatile solid loads by 48 to 69% and 42 to 83%, respectively, TKN loads by 56 to 81%, and total P (TP) loads by 25 to 75%. Loads of the soluble nutrient NH4-N, dissolved reactive P, and K were reduced by 41 to 83%. The first three runoff events after manure application accounted for approximately one-third of the annual total runoff and solid and nutrient loads when averaged across treatments, with loads of TKN, K, and NH...Continue Reading

References

Apr 1, 1990·Bulletin of Environmental Contamination and Toxicology·J A Servizi, R W Gordon
Mar 6, 2003·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Anthony LauGladis Lemus
Dec 17, 2003·Journal of Environmental Quality·D H PoteK Buddington

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Citations

May 6, 2008·Journal of Environmental Quality·David M ButlerLarry T West
Oct 4, 2016·Journal of Environmental Quality·William JokelaJason Cavadini
May 6, 2008·Journal of Environmental Quality·D R LapenN McLaughlin
May 16, 2013·Journal of Environmental Quality·D A McConnellD I Matthews
Apr 28, 2011·Journal of Environmental Quality·J P de KoffP B DeLaune
Oct 6, 2020·Journal of Environmental Quality·Jessica F ShermanJason Cavadini
Apr 28, 2011·Journal of Environmental Quality·Rory O MaguireQuirine M Ketterings

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