Organic supplemental nitrogen sources for field corn production after a hairy vetch cover crop

John Thomas Spargo, M. A. Cavigelli, S. B. Mirsky, J. J. Meisinger, V. J. Ackroyd

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Legume cover crops and organic amendments in combination could meet corn (Zea mays L.) nitrogen (N) needs while optimizing phosphorus (P) inputs. In a 2-yr field study, we characterized the N-mineralization dynamics and impacts on corn grain yield of feather meal (FM), poultry litter (PL), pelletized PL (PPL), and a PPL-FM blend (PFMB) with or without a hairy vetch (Vicia villosa Roth) cover crop. The four amendments, which differed substantially in chemical and laboratory N-release characteristics, provided corn yield benefits only when vetch biomass was low. In 2010, vetch produced 4630 kg biomass ha−1 and increased corn grain yield from 8.7 to 13.3 Mg ha−1 compared with a no-vetch treatment. Vetch alone supplied sufficient N to achieve maximum corn yield as determined using an ammonium nitrate fertilizer response curve embedded within the organic amendment experiment. In 2009, vetch produced only 1551 kg ha−1 and provided no benefit to corn yield. Three of the organic amendments (all but PPL) increased corn yield by 1.8 to 2.3 Mg ha−1 whether vetch was present or not. Phosphorus inputs from amendments were similar to, or lower than, P removal in corn grain harvest, indicating that amendments would not result in soil P accumulation at these application rates. Amendment costs differed substantially such that economic returns using PL would be considerably greater than with PPL, PFMB, or FM. Results show that considering legume cover crop biomass is critical to determining organic amendment applications.

Original languageEnglish (US)
Pages (from-to)1992-2002
Number of pages11
JournalAgronomy Journal
Volume108
Issue number5
DOIs
StatePublished - Sep 1 2016

Fingerprint

Vicia villosa
cover crops
Vicia
corn
nitrogen
feather meal
poultry manure
biomass
legumes
grain yield
ammonium fertilizers
nitrate fertilizers
phosphorus
ammonium nitrate
application rate
mineralization
Zea mays

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

Cite this

Spargo, John Thomas ; Cavigelli, M. A. ; Mirsky, S. B. ; Meisinger, J. J. ; Ackroyd, V. J. / Organic supplemental nitrogen sources for field corn production after a hairy vetch cover crop. In: Agronomy Journal. 2016 ; Vol. 108, No. 5. pp. 1992-2002.
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Organic supplemental nitrogen sources for field corn production after a hairy vetch cover crop. / Spargo, John Thomas; Cavigelli, M. A.; Mirsky, S. B.; Meisinger, J. J.; Ackroyd, V. J.

In: Agronomy Journal, Vol. 108, No. 5, 01.09.2016, p. 1992-2002.

Research output: Contribution to journalArticle

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