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United States Department of Agriculture

Agricultural Research Service

Title: Quantification of Kura Clover Dinitrogen Fixation

Authors
item Seguin, Philippe - UNIVERSITY OF MINNESOTA
item Sheaffer, Craig - UNIVERSITY OF MINNESOTA
item Russelle, Michael
item Ehlke, Nancy - UNIVERSITY OF MINNESOTA
item Graham, Peter - UNIVERSITY OF MINNESOTA

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: July 20, 1999
Publication Date: N/A

Technical Abstract: Kura clover (Trifolium ambiguum M.B.) is a promising perennial pasture legume, but there is little information on the amount of N2 it fixes. We quantified N2 fixation by Kura clover stands in their first and second years of production compared to birdsfoot trefoil (Lotus corniculatus L.) stands, using the 15N dilution method. Results varied among harvests and across locations and stand age. Kura clover derived a lower average annual percent of N from the atmosphere than birdsfoot trefoil (59 and 65%, respectively). Annual herbage yield and total N2 fixation for the two species were however similar for most site-years (avg. 8432 kg/ha and 156 kg N/ha, respectively).

Last Modified: 12/18/2014
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