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- Title
Enhanced efficiency nitrogen formulations on stockpiled tall fescue production.
- Authors
Payne, Kathryn M.; Smith, S. Ray; Goff, Ben M.
- Abstract
Late summer application of nitrogen (N) fertilizer on stockpiled tall fescue [Schedonorus arundinaceus (Schreb.)] can improve forage yields. Using enhanced efficiency N fertilizers may be of benefit by reducing ammonia volatilization losses and promoting forage growth later in the growing season. This study evaluated the effect of different enhanced efficiency N formulations (Agrotain-treated urea, SuperU, and Environmentally Smart Nitrogen) and untreated urea on the yield and nutritive value of stockpiled 'KY-31' tall fescue over two stockpiling periods (2015-2016 and 2016-2017). Nitrogen was applied at four rates (0, 45, 90, and 134 kg N ha-1) in one application in late August prior to the beginning of the stockpiling period in Lexington, KY. During the 2015-2016 stockpiling period, forage yields increased with increasing N rates; forage yields ranged from 2,913 kg dry matter (DM) ha-1 when no N was applied up to 4,132 kg DM ha-1 when 134 kg N ha-1 was applied. Although forage yield was lower during the 2016--2017 stockpiling period, yield increased 75% even with the lowest N rate. Forage nutritive value was improved with increasing N rate. There were no differences in forage yield or nutritive value among enhanced efficiency N sources and standard urea. In summary, N applied in August improved stockpiled forage yield and nutritive value, regardless of N source.
- Subjects
LEXINGTON (Ky.); TALL fescue; FORAGE plants; NITROGEN; GROWING season; RYEGRASSES; UREA; UREA as fertilizer; FERTILIZERS
- Publication
Agronomy Journal, 2021, Vol 113, Issue 2, p1596
- ISSN
0002-1962
- Publication type
Article
- DOI
10.1002/agj2.20553