IMPACTS DE LA CONCENTRATION ET DU TYPE DE SEL SUR LE POTENTIEL GERMINATIF ET LA PRODUCTION DE BIOMASSE CHEZ L’ORGE (HORDEUM VULGARE)

  • A. MASMOUDI
  • A. HEMEIR
  • M. BENAISSA

Résumé

La présente étude a pour objectif de déterminer l’effet de la salinité représentée par la concentration et le type de sels sur la
germination et la croissance de l’orge. Les sels utilisés sont : NaCl, KCl, MgSO4 et Na2SO4avec les doses 6, 12 et
18g/lcombinées avec des doses 0, 0.5 et 1g/l d'un amendement calcique représenté par CaCl2 et CaSO4.Les paramètres étudiés
sont le taux de germination, et la production de la biomasse qui comporte la partie aérienne et la partie racinaire. Les résultats
obtenus montrent que l’augmentation de la salinité est néfaste sur les paramètres cités :diminution du taux de germination,
réduction de la croissance de la partie aérienne et racinaire et une chute de la production de la matière fraiche.Cependant
l’amendement calcique a montré un effet remarquable sur le végétal par rapport aux traitements non amendés en allégeant
l’effet inhibiteur des sels. Concernant l’effet du type de sel, il semble que les sels KCl, MgSO4 et Na2SO4 apparaissent moins
toxiques que NaCl.

 

This study is designed to determine the effect of salinity concentration and the type of salts on the germination and growth of
barley. The salts used are: NaCl, KCl, MgSO4 and Na2SO4 with doses 6, 12 and 18 g/l combined with doses 0, 0.5 and 1 g/l
of calcium amendment represented by CaCl2 and CaSO4. The parameters studied are the germination rate, and production of
biomass that has the air and the root part. The results obtained show that the increase in salinity is harmful on the quoted
parameters: decrease in germination rate, reduction in the growth of the aerial and root part and a fall of the production of the
fresh material. However the calcium amendment has shown a remarkable effect on the plant compared to treatments not
amended by easing the inhibitory effect of salts. Concerning the effect of the type of salt, it seems that NaCl appear less toxic
than KCl, MgSO4 and Na2SO4 salts.

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Comment citer
MASMOUDI, A.; HEMEIR, A.; BENAISSA, M.. IMPACTS DE LA CONCENTRATION ET DU TYPE DE SEL SUR LE POTENTIEL GERMINATIF ET LA PRODUCTION DE BIOMASSE CHEZ L’ORGE (HORDEUM VULGARE). Courrier du Savoir, [S.l.], v. 18, juin 2014. ISSN 1112-3338. Disponible à l'adresse : >http://revues.univ-biskra.dz/index.php/cds/article/view/655>. Date de consultation : 02 jui. 2020
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