Living mulches of legumes in imidazolinone-resistant corn

Sjoerd Willem Duiker, Nathan L. Hartwig

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Living mulches of legumes are permanent cover crops that can fix atmospheric N and improve soil quality. The objectives of this study were to determine effects of living mulches on corn (Zea mays L.) yield and N fertilizer response and on soil quality. In this split-plot design, living mulches were main plots and N rates (0-225 kg ha-1 N) subplots. Living mulches were crownvetch (Coronilla varia L.) cultivars Penngift and Pennmulch, flatpea (Lathyrus sylvestris L.) cultivar Lathco, birdsfoot trefoil (Lotus corniculatus L.) cultivars Empire and Steadfast, hairy vetch (Vicia villosa Roth), and galega (Galega officinalis L.). The crop was rainfed imidazolinone (IMI)-resistant corn on a Murrill silt loam (Typic Hapludult) in central Pennsylvania. Only crownvetch, flatpea, and birdsfoot trefoil (BFT) cultivars survived the herbicide program. Living mulches did not reduce corn yields, except in the dry year of 1995. The average N fertilizer equivalency of Penngift, Pennmulch, Empire, Steadfast, and Lathco was 71, 45, 44, 13, and 50 kg ha-1 yr-1, respectively, at 0 N rates. Their N fertilizer equivalency decreased to zero, however, with increasing N fertilizer rates. Bulk density, soil organic C content, and infiltration rate were not significantly improved after 10 yr of Penngift living mulch. When suppressed severely, crownvetch, BFT, and flatpea can be managed without yield reduction to IMI-resistant corn, but then N contribution to corn and soil quality benefits will be limited. For maximum corn yield, full N rates are required with these living mulches.

Original languageEnglish (US)
Pages (from-to)1021-1028
Number of pages8
JournalAgronomy Journal
Volume96
Issue number4
StatePublished - Jul 1 2004

Fingerprint

live mulches
Lotus corniculatus
legumes
corn
nitrogen fertilizers
soil quality
Vicia villosa
cultivars
Lathyrus sylvestris
Galega officinalis
Securigera varia
Galega
fertilizer rates
cover crops
organic soils
silt
bulk density
herbicides
Zea mays
crops

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

Cite this

Duiker, Sjoerd Willem ; Hartwig, Nathan L. / Living mulches of legumes in imidazolinone-resistant corn. In: Agronomy Journal. 2004 ; Vol. 96, No. 4. pp. 1021-1028.
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Duiker, SW & Hartwig, NL 2004, 'Living mulches of legumes in imidazolinone-resistant corn', Agronomy Journal, vol. 96, no. 4, pp. 1021-1028.

Living mulches of legumes in imidazolinone-resistant corn. / Duiker, Sjoerd Willem; Hartwig, Nathan L.

In: Agronomy Journal, Vol. 96, No. 4, 01.07.2004, p. 1021-1028.

Research output: Contribution to journalArticle

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