Do hard red spring wheat varieties vary in their response to Sulfur?

Daniel E. Kaiser, Apurba K. Sutradhar, Jochum J. Wiersma

Research output: Contribution to journalArticle

Abstract

Sulfur is increasingly reported as deficient in many crops in the Upper Midwest of the United States. The objectives of this study were to determine if hard red spring wheat (HRSW) (Triticum aestivum L. em thell.) varieties vary in response to S and to determine if plant tissue analysis can predict grain yield. Two studies were established in Minnesota. Study 1 compared two sources of S applied at four rates with and without in-sea-son S. Study 2 compared the response of six HRSW varieties to three rates of S (0, 8, and 16 kg S ha–1). Spring wheat grain yield and protein concentration were not affected by S rate, source, or timing with soil organic matter (SOM) >20 g kg–1. For locations with SOM <20 g kg–1, which were all sandy and irrigated, 8 kg S ha–1 maximized grain yield and protein concentration. Flag leaf S concentration varied among varieties separately from S rate applied. Wheat grain yield decreased when flag leaf S concentration was <4.1 g S kg–1, and grain yield responses were likely with concentrations <2.8 g S kg–1. There were negative relationships between tissue N/S concentration ratios and grain yield, but critical N/S concentration could not be determined. Application of S for HRSW should be targeted to soils with SOM <20 g kg–1 (0–15 cm). Sulfur rates sufficient to increase yield will result in an optimal protein concentration, and guidelines should not be varied based on the variety grown.

Original languageEnglish (US)
Pages (from-to)2422-2434
Number of pages13
JournalAgronomy Journal
Volume111
Issue number5
DOIs
StatePublished - Sep 1 2019

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hard red spring wheat
sulfur
grain yield
soil organic matter
grain protein
tissue analysis
wheat protein
Midwestern United States
spring wheat
plant tissues
leaves
Triticum aestivum
wheat
crops
soil

Cite this

Do hard red spring wheat varieties vary in their response to Sulfur? / Kaiser, Daniel E.; Sutradhar, Apurba K.; Wiersma, Jochum J.

In: Agronomy Journal, Vol. 111, No. 5, 01.09.2019, p. 2422-2434.

Research output: Contribution to journalArticle

Kaiser, Daniel E. ; Sutradhar, Apurba K. ; Wiersma, Jochum J. / Do hard red spring wheat varieties vary in their response to Sulfur?. In: Agronomy Journal. 2019 ; Vol. 111, No. 5. pp. 2422-2434.
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