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Effect of water regimes and pre-sowing treatments on seeds germination of different provenances of Jatropha curcas L. in Senegal

This study aimed at exploring the effects of water regimes and pre-sowing treatments on germination of Jatropha curcas L (J. curcas). The experimental design was a split-split-plot with 3 replications. The main factor was water regime; the second was accession and the third, seed pretreatment. Ten seeds per treatment were used. Three water regimes were considered: 100%, 50% and 25% field capacity. Two Accessions of J. curcas collected from two different ecological areas of Senegal were used. Two levels of pretreatment, unsoaked seeds directly sown (control T0), seed immersed in tap water for 12h before sowing (T1). The study was done in the green house of the Regional Centre for Studies on the Improvement of Plant Adaptation to Drought of Senegalese Agriculture Research Institute (ISRA). Our results revealed that soaking J. curcas seeds for 12h significantly (P<0.01) enhanced seed germination parameters. The first germinations were noted 3 days after sowing. Water regime treatment had significant effect on the final germination percentage. Higher germination (52.5%) was observed at 50% field capacity followed by 25% field capacity treatment with 31.67%. One hundred percent field capacity showed the lowest final germination (12.92%). The accession of Sudan zone (JC-02) showed the higher germination (47.78%) whereas accession of Sudan-sahel zone Jc-01 had 16.94%. The best germination percentage (80%) was observed in 50% field capacity at T1 treatment with Jc-02 accession.

Auteur(s) : Outtara B, Diedhiou I, Ndoye K N, Diouf D, Akpo L E
Pages : 151-156
Année de publication : 2011
Revue : International Journal of Science and Advanced Technology
N° de volume : 1 (9)
Type : Article
Mise en ligne par : DIOUF Diégane