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Assessment of Sulfur Deficiency under Field Conditions by Single Measurements of Sulfur, Chloride and Phosphorus in Mature Leaves

Abstract : Determination of S status is very important to detect S deficiency and prevent losses of yield and seed quality. The aim of this study was to investigate the possibility of using the ([Cl−]+[NO3−]+[PO43−]):[SO42−] ratio as an indicator of S nutrition under field conditions in Brassica napus and whether this could be applied to other species. Different S and nitrogen (N) fertilizations were applied on a S deficient field of oilseed rape to harvest mature leaves and analyze their anion and element contents in order to evaluate a new S nutrition indicator and useful threshold values. Large sets of commercial varieties were then used to test S deficiency scenarios. As main results, this study shown that, under field conditions, leaf ([Cl−]+[NO3−]+[PO43−]):[SO42−] ratio was increased by lowering S fertilization, indicating S deficiency. The usefulness of this ratio was also found for other species grown under controlled conditions and it could be simplified by using the elemental ([Cl]+[P]):[S] ratio. Threshold values were determined and used for the clustering of commercial varieties within three groups: S deficient, at risk of S deficiency and S sufficient. The ([Cl]+[P]):[S] ratio quantified under field conditions, can be used as an early and accurate diagnostic tool to manage S fertilization.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02183716
Contributor : Sophie Delle Cave <>
Submitted on : Monday, July 15, 2019 - 3:23:50 PM
Last modification on : Thursday, July 30, 2020 - 10:56:06 AM

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Philippe Etienne, Elise Sorin, Anne Maillard, Karine Gallardo, Mustapha Arkoun, et al.. Assessment of Sulfur Deficiency under Field Conditions by Single Measurements of Sulfur, Chloride and Phosphorus in Mature Leaves. Plants, MDPI, 2018, 7 (2), pp.37. ⟨10.3390/plants7020037⟩. ⟨hal-02183716⟩

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