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The Fate of Late‐Fall‐Applied Nitrogen in Creeping Bentgrass and Annual Bluegrass
Author(s) -
Frank Kevin W.,
Nikolai Thomas A.,
Hathaway Aaron,
Williams Zhu
Publication year - 2018
Publication title -
crop, forage and turfgrass management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.29
H-Index - 10
ISSN - 2374-3832
DOI - 10.2134/cftm2018.04.0029
Subject(s) - loam , nitrogen , agrostis stolonifera , poa annua , agronomy , fertilizer , agrostis , chemistry , horticulture , environmental science , soil water , biology , poaceae , soil science , organic chemistry
Core Ideas Research was conducted to determine the fate of late‐fall‐applied nitrogen in creeping bentgrass and annual bluegrass. Overall, the percentage of labeled fertilizer nitrogen recovered in November at 7 days after treatment was 55%, with 47% of this total recovered in soil. Recovery of labeled fertilizer nitrogen in the plant from a November N application was low, 9% in 2010–2011 and 3% in 2011–2012.Research was conducted to determine the fate of late‐fall‐applied nitrogen (N) in a creeping bentgrass [ Agrostis stolonifera var. L. palustris (Huds.) Farw. ‘Penncross’] and annual bluegrass ( Poa annua var. reptans L.) fairway. The soil was a Marlette sandy loam (fine‐loamy, mixed, mesic Glossoboric Hapludalfs) (66% sand, 23% silt, and 11% clay) with a pH of 7.4. Plots were treated with 15 N double‐labeled urea (46N‐0P‐0K) (10 atom % excess) in solution at 1 lb N/1000 ft 2 on 11 Nov. 2010 and 8 Nov. 2011 to facilitate fertilizer identification among verdure, roots, and soil. Different plot areas were used in 2010 and 2011. Overall, the percentage of labeled fertilizer nitrogen (LFN) recovered in November at 7 DAT was 55%, 47% of the total was recovered in the soil. By the April sampling, the percentage of LFN recovered in soil had declined to 22%, and there was not a corresponding increase in LFN recovered in the plant. Recovery of LFN in the plant from a November N application was low, 9% in 2010–2011 and 3% in 2011–2012. Although plant recovery of applied LFN was low, between species, a higher percentage of LFN was recovered in the verdure of annual bluegrass than creeping bentgrass, 3 and 2%, respectively.