Article
 

Long-Term Crop Residue and Nitrogen Management Effects on Soil Profile Carbon and Nitrogen in Wheat–Fallow Systems

Público Deposited

Conteúdo disponível para baixar

Baixar PDF
https://ir.library.oregonstate.edu/concern/articles/4j03d138v

Descriptions

Attribute NameValues
Creator
Abstract
  • Intensive cultivation of native grassland for dryland agriculture continuously depleted soil organic carbon (SOC) and nutrients. In 2010, we evaluated the influence of 80 yr of crop residue and nutrient management practices on SOC and N in 0- to 60-cm soil depth profiles in conventionally tilled winter wheat (Triticum aestivum L.)–summer fallow (WW–SF) system. Residue and N treatments, no N addition with fall burning (FB0), spring burning (SB0), and no burning (NB0), 45 kg N ha⁻¹ with SB (SB45) and NB (NB45), 90 kg N ha⁻¹ with SB (SB90) and NB (NB90), manure (MN, 5.32 Mg dry mass ha⁻¹ yr⁻¹), and pea vines (PV, 0.99 Mg dry mass ha⁻¹ yr⁻¹), were in ordered arrangement, and an undisturbed grassland (GP) was used as a reference. All WW–SF treatments had less SOC and N stocks than GP. The SOC stocks were lowest under FB0 with 50% less SOC than GP. The WW–SF treatments have depleted up to 63 and 26% of SOC and N from surface soil since 1931. Fall burning and MN treatments depleted SOC at rates of 0.64 and 0.17 Mg ha⁻¹ yr⁻¹. Nitrogen stocks decreased at a rate of 0.02 Mg ha⁻¹ yr⁻¹ in FB, SB, and NB treatments, and 0.01 Mg ha⁻¹ yr⁻¹ in PV treatment. Reduction in tillage, application of low C/N ratio residues, and elimination of burning can improve sustainability of winter wheat production in the summer fallow region of the Pacific Northwest (PNW).
Resource Type
DOI
Date Available
Date Issued
Citation
  • Ghimire, R., Machado, S., & Rhinhart, K. (2015). Long-term crop residue and nitrogen management effects on soil profile carbon and nitrogen in wheat–fallow systems. Agronomy Journal, 107(6), 2230-2240. doi:10.2134/agronj14.0601
Journal Title
Journal Volume
  • 107
Journal Issue/Number
  • 6
Declaração de direitos
Funding Statement (additional comments about funding)
  • This paper is based upon work that is supported by the National Institute of Food and Agriculture, U.S. Department of Agriculture, under award number 2011-68002-30191) and additional support from the Columbia Basin Agricultural Research Center.
Publisher
Peer Reviewed
Language
Replaces

Relações

Parents:

This work has no parents.

Itens

Miniatura Título Data de carga Acesso Ações
file details GhimireLongTermCropResidueNitrogenManagementEffects.pdf 07/26/2017 Público
file details GhimireLongTermCropResidueNitrogenManagementEffectsFigure1.pdf 07/26/2017 Público
file details GhimireLongTermCropResidueNitrogenManagementEffectsFigure2.pdf 07/26/2017 Público