Stacked Crop Rotation Reduces Soil Organic Carbon and Crop Yield Compared with Alternate-Year Rotation

dc.contributor.author Sainju, Upendra
dc.contributor.author Lenssen, Andrew
dc.contributor.author Lenssen, Andrew
dc.contributor.author Allen, Brett
dc.contributor.author Stevens, William
dc.contributor.author Jabro, Jalal
dc.contributor.department Agronomy
dc.date 2018-02-18T01:45:46.000
dc.date.accessioned 2020-06-29T23:02:03Z
dc.date.available 2020-06-29T23:02:03Z
dc.date.embargo 2016-11-23
dc.date.issued 2016-01-01
dc.description.abstract <p>Stacked crop rotations and improved cultural practices have been used to control pests, but their impact on soil organic C (SOC) and crop yield are lacking. We evaluated the effects of stacked vs. alternate-year rotations and cultural practices on SOC at the 0- to 125-cm depth and annualized crop yields from 2005 to 2011 in the northern Great Plains. Stacked rotations were durum (<em>Triticum turgidum </em>L.)-durum-canola (<em>Brassica napus</em> L.)-pea (<em>Pisum sativum </em>L.) (D-D-C-P) and durum-durum-flax (<em>Linum usitatissimum</em> L.)-pea (D-D-F-P). Alternate-year rotations were durum-canola-durum-pea (D-C-D-P) and durum-flax-durum-pea (D-F-D-P). Cultural practices were traditional (conventional till, recommended seed rate, broadcast N fertilization, and reduced stubble height) and ecological (no-till, increased seed rate, banded N fertilization, and increased stubble height). Annualized biomass residue (stems and leaves) returned to the soil and grain yield were greater with D-C-D-P and D-D-C-P than D-D-F-P and greater with the ecological than the traditional practice. The SOC at 5 to 10 cm was lower with D-D-C-P than other crop rotations and lower with the ecological than the traditional practice. At 20 to 50, 50 to 88, and 0 to 125 cm, SOC was lower with D-D-F-P than D-C-D-P and D-F-D-P. Regardless of treatments, SOC declined linearly from 2005 to 2011. The SOC at 0 to 125 cm increased linearly with annualized crop yield (R<sup>2 </sup>= 0.58, <em>P</em> ≤ 0.01). Stacked rotations reduced SOC storage and crop yield compared with alternate-year rotations. Ecological cultural practice increased crop yield with minimum impact on SOC compared with the traditional practice.</p>
dc.description.comments <p>This is an abstract of a presentation from the ASA-CSSA-SSSA Annual Meeting, Phoenix, AZ, November 6–9, 2016. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/agron_conf/19/
dc.identifier.articleid 1018
dc.identifier.contextkey 9412914
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_conf/19
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/4356
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/agron_conf/19/2016_Sainju_StackedCrop.pdf|||Fri Jan 14 21:50:09 UTC 2022
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.title Stacked Crop Rotation Reduces Soil Organic Carbon and Crop Yield Compared with Alternate-Year Rotation
dc.type article
dc.type.genre abstract
dspace.entity.type Publication
relation.isAuthorOfPublication 7f67ca95-722b-4dfd-8f49-56ff95980240
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
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