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United States Department of Agriculture

Agricultural Research Service


Location: Dairy Forage Research

Title: Yields of Corn Silage Fertilized with Manure and Grown with Legume or Non-legume Companion Crops

item Grabber, John

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 5/12/2009
Publication Date: 11/1/2009
Citation: Grabber, J.H. 2009. Yields of Corn Silage Fertilized with Manure and Grown with Legume or Non-legume Companion Crops. ASA-CSSA-SSSA Annual Meeting Abstracts. Abstract No. 54579.

Interpretive Summary:

Technical Abstract: In addition to reducing nitrate and soil losses, cover crops and living mulches could enhance corn silage yields. In a four-year study in southern Wisconsin, no-till corn was grown with herbicide-suppressed Kura-clover or with June-interseeded red clover followed by one year of clover production. These rotations were compared to continuous corn grown with June-interseeded Italian ryegrass, September-seeded winter rye, or no cover crop. Each year, manure slurry was applied on a phosphorus basis and continuous corn plots received additional fertilizer at planting to supply 180 kg/ha of available nitrogen. In 2003 (dry summer), dry matter yields of corn silage were greatest with red clover (23.0 Mg/ha) and lowest with Italian ryegrass (18.4 Mg/ha). In 2004 (wet spring and cool summer), corn silage yields with kura clover (20.0 Mg/ha) exceeded other companion crop systems (16.1 to 17.8 Mg/ha). In 2005 (dry spring and early summer), corn silage yields with red clover (22.1 Mg/ha) surpassed other systems (14.1 to 16.3 Mg/ha). In 2006 (wet spring, uneven stands), corn silage yields were greatest with kura and red clover (16.0 Mg/ha, respectively) and lowest with Italian ryegrass (12.2 Mg/ha). Spring vs. fall manure application did not influence corn yields. Growth of companion crops was greatest for Italian ryegrass (0.9 to 2.0 Mg/ha) by late October while growth of winter rye (2.9 to 5.7 Mg/ha) exceeded other companion crops by late April. Overall, corn silage yields tended to be enhanced by clovers, depressed by Italian ryegrass, and not influenced by winter rye companion crops.

Last Modified: 06/27/2017
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