Reduced potential for nitrogen loss in cover crop-soybean relay systems in a cold climate

Sharon Weyers, Matt Thom, Frank Forcella, Carrie Eberle, Heather Matthees, Russ Gesch, Matthew Ott, Gary Feyereisen, Jeffery Strock, Don Wyse

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Winter cover crops might reduce nutrient loss to leaching in the Upper Midwest. New oilseed-bearing cash cover crops, such as winter camelina (Camelina sativa L.) and pennycress (Thlaspi arvense L.), may provide needed incentives. However, the abilities of these crops to sequester labile soil nutrients are unknown. To address this unknown, N in shoot biomass, plant-available N and P in soil, and NO3--N and soluble reactive P in soil water collected from lysimeters placed at 30, 60, and 100 cm were measured in cover crop and fallow treatments established in spring wheat (Triticum aestivum L.) stubble and followed through a cover crop-soybean [Glycine max (L.) Merr.] rotation. Five no-till cover treatments (forage radish [Raphanus sativus L.], winter rye [Secale cereale L.], field pennycress, and winter camelina) were compared with two fallow treatments (chisel till and no-till). Pennycress and winter camelina were harvested at maturity after relay sowing of soybean. Winter rye and radish sequestered more N in autumn shoot biomass, ranging from 26 to 38 kg N ha-1, but overwintering oilseeds matched or exceeded N uptake in spring, ranging 28 to 49 kg N ha-1 before soybean planting. Nitrogen uptake was reflected by reductions in soil water NO3--N during cover crop and intercropping phases for all cover treatments (mean = 4 mg L-1), compared with fallow treatments (mean = 31 mg L-1). Cash cover crops like pennycress and winter camelina provide both environmental and potential economic resources to growers. They are cash-generating crops able to sequester labile soil nutrients, which protects and promotes soil health from autumn through early summer.

Original languageEnglish (US)
Pages (from-to)660-669
Number of pages10
JournalJournal of Environmental Quality
Volume48
Issue number3
DOIs
StatePublished - May 1 2019

Fingerprint

cover crop
Crops
soybean
Nitrogen
nitrogen
winter
climate
Soils
fallow
Nutrients
Oilseeds
soil nutrient
shoot
soil water
autumn
Biomass
Bearings (structural)
Lysimeters
stubble
intercropping

PubMed: MeSH publication types

  • Journal Article

Cite this

Reduced potential for nitrogen loss in cover crop-soybean relay systems in a cold climate. / Weyers, Sharon; Thom, Matt; Forcella, Frank; Eberle, Carrie; Matthees, Heather; Gesch, Russ; Ott, Matthew; Feyereisen, Gary; Strock, Jeffery; Wyse, Don.

In: Journal of Environmental Quality, Vol. 48, No. 3, 01.05.2019, p. 660-669.

Research output: Contribution to journalArticle

Weyers, S, Thom, M, Forcella, F, Eberle, C, Matthees, H, Gesch, R, Ott, M, Feyereisen, G, Strock, J & Wyse, D 2019, 'Reduced potential for nitrogen loss in cover crop-soybean relay systems in a cold climate', Journal of Environmental Quality, vol. 48, no. 3, pp. 660-669. https://doi.org/10.2134/jeq2018.09.0350
Weyers, Sharon ; Thom, Matt ; Forcella, Frank ; Eberle, Carrie ; Matthees, Heather ; Gesch, Russ ; Ott, Matthew ; Feyereisen, Gary ; Strock, Jeffery ; Wyse, Don. / Reduced potential for nitrogen loss in cover crop-soybean relay systems in a cold climate. In: Journal of Environmental Quality. 2019 ; Vol. 48, No. 3. pp. 660-669.
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