Plant Soil Environ., 2002, 48(10):433-440 | DOI: 10.17221/4392-PSE

Sulfur and sulfate concentrations in leaves of oilseed rape under field conditions

J. Matula, M. Pechová
Research Institute of Crop Production, Prague-Ruzynì, Czech Republic

In 1999-2001 sulfur and sulfate concentrations were studied in expanded young leaves of rapes of the line variety Lirajet and hybrid variety Pronto at the onset of stem elongation (DC 30), flowering (DC 64) and early maturity (DC 70) in different localities of the Czech Republic. Except the S-deficient site the concentration of total sulfur and sulfates in leaves considerably increased in higher growth stages. A less steep increase in S concentration in leaves was associated with rather humid growing season, especially with April precipitation. Great time variations in sulfur concentrations in leaves signal a possibility of diagnostic misinterpretation of plant analysis without exact definition of growth stage. The shape of trend of variations in S concentration in leaves indicates the S nutritive state of the site and the intensity of upward transport of sulfates with soil moisture in the crop nutrition with sulfur. Good yields of rapeseed were connected with minimum concentration of total sulfur 0.5%, and sulfate sulfur 0.2% in leaf dry matter at DC 30. The proportion of sulfates in total concentration of sulfur in rape leaves ranged from 30 to 60% at the onset of stem extension and it increased in higher phenophases. At flowering, sulfates accounted for 80% and more at sites where sulfate uptake from the soil environment was not problematic. Besides the S-soil test, the results of investigations indicate the importance of CEC value of soil for the preventive diagnosis of S-nutrient state of the site.

Keywords: winter rape; growth stages; expanded young leaves; sulfur; sulfates

Published: October 31, 2002  Show citation

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Matula J, Pechová M. Sulfur and sulfate concentrations in leaves of oilseed rape under field conditions. Plant Soil Environ. 2002;48(10):433-440. doi: 10.17221/4392-PSE.
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