Journal
JOURNAL OF PLANT NUTRITION
Volume 35, Issue 7, Pages 990-1003Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01904167.2012.671403
Keywords
sulfur; plant analysis; wheat
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Funding
- INTA [AERN 5656]
- FCA UNMP [15/A261]
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A key aspect of any sulfur (S) availability indicator is its stability throughout the crop cycle. Nine experiments were conducted with the objective to evaluate the stability of the nitrogen (N):S ratio in aerial biomass (W) in spring wheat, and to define the critical curve of S dilution. As the crop cycle progressed, a decrease (P < 0.05) in total N:S was determined. This lack of stability was explained by a lower S dilution in relation to N (P < 0.05). A decrease (P < 0.05) in N accumulation rate in relation to S was obtained as the crop cycle progressed, which points out that S accumulation in relation to N is later. A first approach was determined to the definition of the S dilution critical curve (Sc) from tillering beginning to stem elongation end (Sc = 0.37 W-(0.169); r(2) = 0.71 and n = 24).
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