Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 8/1/1997
Publication Date: N/A
Citation: N/A Interpretive Summary:
Technical Abstract: Reed canarygrass (Phalaris arundinacea L.) yields can be increased substantially with high rates of dairy manure. Our objective was to determine nitrate N concentrations in the soil profile and N uptake by the herbage as affected by annual broadcast manure rates of 0, 94, 188, 282, and 376 m3/ha. The manure was split-applied after the second and third cuts for 2 consecutive years and compared to 112 and 448 kg fertilizer N ha/yr at sites in Iowa, Minnesota, and Wisconsin. Excessive nitrate N concentrations were not found in the soil profile for any treatment on the clay loam soils. On the sandy loam soil, nitrate N exceeded 20 mg/L in the soil solution at the 1.5 m depth with the 376 m3 manure and 448 kg fertilizer N treatments. Nitrogen removal in the herbage increased linearly with manure rate. Reed canarygrass appears to be an excellent sink for high rates of dairy manure, especially on fine textured soils.