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United States Department of Agriculture

Agricultural Research Service

Title: Nitrate Accumulation in the Soil Profile and N Removal by Reed Canarygrass As Affected by Rates of Dairy Manure

Authors
item Randall, Gyles - UNIVERSITY OF MINNESOTA
item Schmitt, Michael - UNIVERSITY OF MINNESOTA
item Russelle, Michael
item Greub, Louis - UNIVERSITY OF WISCONSIN
item Clayton, Paul - LAND O LAKES
item Ivers, Drew - LAND O LAKES

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: August 1, 1997
Publication Date: N/A

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.

Last Modified: 4/19/2014
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