Main content area

Nitrous Oxide Loss from Poultry Manure-Amended Soil after Rain

Coyne, M. S., Villalba, A., Blevins, R. L.
Journal of environmental quality 1995 v.24 no.6 pp. 1091-1096
agricultural soils, filter strips, industry, land application, losses from soil, nitrates, nitrogen fertilizers, nitrous oxide, poultry, poultry manure, rain, rainfall simulation, runoff, silt loam soils, soil amendments, surface water, Kentucky
Land application of poultry wastes in Kentucky will increase as the broiler industry grows. If poultry manure stimulates NO loss from soil it will reduce the fertilizer N value of this waste. In contrast, stimulated NO loss in grass filter strips receiving the runoff from manured fields could help reduce contamination of surface water by NO. Our objectives were to determine (i) if poultry manure stimulated NO loss in soil after rainfall and (ii) if there was an edge-of-field effect on NO loss in grass filters intercepting runoff from amended soil. Soil covers were used to measure NO loss from a well-drained, poultry manure-amended, silt loam soil immediately after simulated rainfall and were also used to measure NO loss from grass filters intercepting their surface runoff. Nitrous oxide loss from manure-amended soil was greater than from unamended controls and ranged from 5 to 13 mg NO-N m h. The maximum NO loss was equivalent to 3.2 kg NO-N ha d. Nitrous oxide loss from grass filters intercepting runoff ranged from 0.1 to 1.4 mg NO-N m h and was significantly greater than portions of the grass filters that did not intercept runoff. Nitrous oxide loss from poultry manure-amended soils was greater than NO loss typically measured from waste-amended agricultural soils. However, it only represented up to 0.7% of the total N in the applied manure.