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Agronomy Journal Abstract - Soil Fertility & Crop Nutrition

Chloride Fertilizers Increase Spring Wheat Yields in the Northern Great Plains

 

This article in AJ

  1. Vol. 109 No. 1, p. 327-334
     
    Received: Apr 09, 2016
    Accepted: Sept 30, 2016
    Published: January 25, 2017


    * Corresponding author(s): christopher.graham@sdstate.edu
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doi:10.2134/agronj2016.04.0205
  1. Christopher Graham *a,
  2. Howard Woodardb,
  3. Anthony Blyb,
  4. Paul Fixenc and
  5. Ronald Geldermanb
  1. a 1905 Plaza Dr., South Dakota State Univ.–Plant Science, Rapid City, SD 57702
    b South Dakota State Univ.– Plant Science, Agriculture Hall Box 2207A, Brookings, SD 57007
    c International Plant Nutrition Institute, 2301 Research Park Way, Brookings, SD 57006
Core Ideas:
  • Across all site-years of the study, results show a statistically significant grain yield increase of 0.17 t ha–1.
  • Where pre-plant soil test Cl– levels were lower than 1.87 mg kg–1, fertilizer Cl– applications increased grain yield by 0.26 t ha–1 with an average return of $18.42 ha–1.
  • The potential profitability of Cl– fertilizer application is highly dependent on the choice of cultivar.

Abstract

Chloride (Cl) plays an important role in osmoregulatory functions within the plant and aids in disease suppression. Previous research established a soil sufficiency level and fertilizer Cl recommendations based on a 0- to 60-cm soil depth sample. This work found spring wheat (Triticum aestivum L.) yield was responsive to Cl fertilizers on soils with low Cl soil tests. However, the response was often variable and cultivar specific, which suggested that further refinements to the Cl fertilizer recommendations were necessary. In this research, the impact of Cl fertilizer on yield, test weight, and protein of three spring wheat cultivars (Forge, Marshall, and Oxen) was tested in a randomized complete block experiment in 1997, 1998, 1999, 2000, and 2002 in Aurora, SD. Across all years and cultivars, results showed a statistically significant grain yield increase of 0.17 t ha–1 with Cl addition. Similarly, Cl increased test weight by 0.98 kg hL–1. Protein, on the other hand, showed a cultivar by Cl response with Cl increasing protein by 2.28 g protein kg–1 in Oxen and decreasing protein 2.52 g protein kg–1 in Forge. Where pre-plant-soil test Cl levels were lower than 1.87 mg kg–1, fertilizer Cl applications increased grain yield by 0.26 t ha–1 with an average return of $18.42 ha–1. However the potential profitability of Cl fertilizer application is highly dependent on the choice of cultivar. Further research is necessary to assess if increasing spring rainfall in the region will increase Cl yield responses.

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