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See detailIntérêts de mettre en place une filière courte basée sur la culture du jatropha (Jatropha curcas L.) dans la communauté rurale de Dialacoto
Barbier, Jérémy; Cissao, Malang; Tacourou, Bocar et al

Report (2012)

Opportunities to develop a local chain of production, transformation, and marketing based on jatropha cultivation were investigated from 2008 to 2012 in the rural community of Dialacoto (Tambacouda Region ... [more ▼]

Opportunities to develop a local chain of production, transformation, and marketing based on jatropha cultivation were investigated from 2008 to 2012 in the rural community of Dialacoto (Tambacouda Region, Eastern Senegal). The researches have mainly concerned how to integrate jatropha cultivation in existing cropping systems, the modalities to process the seeds with a manual Bielenberg press, and the opportunities for a local transformation and marketing of oil and oilcakes obtained by pressing seeds. The ways to integrate the cultivation of jatropha in the traditional farming systems were studied using two participatory investigation methods and by carrying out agronomic trials on experimental plots. An action research was conducted with three groups of six farmers in order to determine the best modalities of installation and maintenance of jatropha plants. The fields of 24 farmers where jatropha plants were installed as a sole crop, intercropped with cultivated annual plants, or as a living hedge were closely monitored. These fields were selected among the 295 plots that had been planted before or at the beginning of the project. Under the current conditions of remuneration of jatropha seeds in Senegal (65 Fcfa / 0,1 EUR kg-1 dry seeds), and given the low seed yield (less than 200 kg ha-1 for the best tended plots after five years) and the low precocity of the available planting material, the sole and the intercropping of jatropha is not profitable. The development of efficient intercropping systems adapted to the farmer's constraints seems possible, subject to the selection of varieties of jatropha both early and productive, and to an increase in the purchase price of the seeds. Substantial research involving directly the farmers remains to be carried out to develop these intercropping systems. The establishment of living hedges is for the moment the only installation method that can be recommended to farmers. In addition to providing supplementary income related to seed harvest, hedgerows provide different benefits appreciated by farmers: land demarcation, soil protection against wind and water erosion, improved soil water balance and windbreak effect favorable to crop development, crop protection against wandering ruminants, and enclosure for the cattle. These various benefits and the low risk taken by installing hedgerows explain that this method of planting was the most often selected spontaneously by farmers. The production cost of a liter of jatropha filtered oil using a Bielenberg press rises to 1056 FCFA (1.62 EUR). At such a cost, jatropha oil is not competitive compared to its direct use for diesel engines in rustic Lister type used to operate multifunctional platforms. The production of soap is the only local outlet with high potential for oil produced with a manual press. The price of locally produced soap with this oil is competitive compared to that of the industrial soap available on the market and its quality is highly appreciated by potential customers. The use of oil as a bio-pesticide and as fuel for lighting could be interesting opportunities but further investigations are needed to confirm this. This applies also to the use as fertilizer of the oilcakes produced by pressing seeds. [less ▲]

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