Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4381012 | Acta Oecologica | 2009 | 6 Pages |
Abstract
Three concentrations of SO42â, “Low S” (0.009Â mM), “Medium S” (0.384Â mM) and “High S” (1.509Â mM), were used to grow plants in a hydroponic system. S availability modified biomasses significantly only at the end of the experiment (11Â weeks). Medium S appeared optimal while Low S induced a lower aboveground dry mass. An appropriate S availability (Medium S) not only increased S content but also increased N content by stimulating N2 fixation. Plant growth analysis using growth fitted curves and the calculation of RGR revealed that S effects on biomass corresponded to the production of different phenotypes and not to a growth delay. This work shows that the acceleration growth phase (49-56Â days) is a key period for the nutritional needs of white clover and should be the best period for a sulphur fertilisation regime that aims to enhance white clover fitness.
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Authors
Sébastien Varin, Benjamen Leveel, Servane Lemauviel-Lavenant, Jean-Bernard Cliquet,