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Plants 2018, 7(2), 37; https://doi.org/10.3390/plants7020037

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

1
Normandie Université, 14032 Caen CEDEX 5, France
2
Etienne Philippe, Normandie Université-INRA 950 Ecophysiologie Végétale, Agronomie et nutritions N, C, S, Esplanade de la Paix, UNICAEN, CS14032, 14032 Caen CEDEX 5, France
3
INRA, UMR 950 Ecophysiologie Végétale, Agronomie et nutritions N, C, S, Esplanade de la Paix, UNICAEN, CS14032, 14032 Caen CEDEX 5, France
4
Centre Mondial d’Innovation, CMI, Groupe Roullier, 27 Avenue Franklin Roosevelt, 35400 Saint-Malo, France
5
UMR Agroécologie, AgroSup Dijon, INRA, Université Bourgogne Franche-Comté, F-21000 Dijon, France
6
Vegenov BBV, Penn ar Prat, 29250 Saint Pol de Léon, France
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 6 April 2018 / Revised: 20 April 2018 / Accepted: 24 April 2018 / Published: 28 April 2018
(This article belongs to the Special Issue Advances in Plant Sulfur Research)
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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. View Full-Text
Keywords: Brassica napus; diagnostic tools; indicator of S nutrition; S fertilization; Triticum aestivum; Zea mays Brassica napus; diagnostic tools; indicator of S nutrition; S fertilization; Triticum aestivum; Zea mays
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MDPI and ACS Style

Etienne, P.; Sorin, E.; Maillard, A.; Gallardo, K.; Arkoun, M.; Guerrand, J.; Cruz, F.; Yvin, J.-C.; Ourry, A. Assessment of Sulfur Deficiency under Field Conditions by Single Measurements of Sulfur, Chloride and Phosphorus in Mature Leaves. Plants 2018, 7, 37.

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