Effet de l'hydromorphie sur la croissance de quatre variétés de trèfle (Trifolium subterraneum L.)

Smiti, Samira Aschi; Bizid, Essia; Hamza, Mongi

Effet de l'hydromorphie sur la croissance de quatre variétés de trèfle (Trifolium subterraneum L.) | Effect of waterlogging on growth of four varieties of clover (Trifolium subterraneum L.)

2003

Smiti, Samira Aschi | Bizid, Essia | Hamza, Mongi

Effect of waterlogging on growth of four varieties of clover (Trifolium subterraneum L.). Waterlogged soils are characterized by a prolonged oxygen deficit. Their improvement, by adapted cultural techniques, will be of interest. In this context, we observed the effect of flooding on the growth of four varieties of clover (Trifolium subterraneum L.) (in order to make these soils more profitable for agriculture). Applying hypoxic stress, at the second compound leaf stage, for 5, 10 and 20 days, revealed differences in tolerance. Indeed, the biomass production of the Park variety was stimulated in hypoxia (26% and 5%, respectively, after 10 and 20 d of treatment). At final harvest (20 d of hypoxia), the total biomass production of Larisa, Montbaker and Clare decreased to 7%, 10% and 36%, respectively. This result is probably due to the ability of each variety to produce adventitious roots, which is generally thought to be an adaptation to waterlogging.

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