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0756 SRI au Madagascar: Rendement, Méthodes Riziculture, et des Facteurs de Meilleur Rendement dans les Rizières de SRI

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Presenter: Yasuhiro Tsujimoto

Institution: Graduate School of Agriculture,
Kyoto University, Japan

Subject Country: Madagascar

Published in: Technology, Business, Travel
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0756 SRI au Madagascar: Rendement, Méthodes Riziculture, et des Facteurs de Meilleur Rendement dans les Rizières de SRI

  1. 1. SRI au Madagascar Rendement, méthodes riziculture, et des facteurs de meilleur rendement dans les rizières de SRI Yasuhiro Tsujimoto Graduate School of Agriculture Kyoto University
  2. 2. Eléments du SRI <ul><li>Repiquage du jeunes plants , 8-12 jours après le ensemencement . </li></ul><ul><li>Repiquage spacieux (16 pieds/m 2 ) </li></ul><ul><li>Emploi de la mati è re organi que abondant e. </li></ul><ul><li>Irrigation intermittente pendant la croissance végétative, et après irrigation peu profond jusqu’à maturité. </li></ul><ul><li>Le sarclage fr équent. </li></ul>Techniques intensives, origine au Madagascar dans 1980s
  3. 3. Controverses sur SRI <ul><li>On peux doubler ou tripler le rendement avec SRI sans extra ressource </li></ul><ul><li>Rapports de rendements plus que 15 t/ha </li></ul><ul><li>= Système de riziculture qui améliora le productivité dans les régions sans ressources. </li></ul><ul><li>Touts les rapport sur SRI manquent les renseignements détaillés et les données scientifiques </li></ul><ul><li>Rapports de super-high yields sont probablement a cause de erreur de mesure </li></ul>
  4. 4. Objectifs <ul><li>Est-ce qu’il y a des paysans qui réalisent du rendement plus que 15 t/ha? </li></ul><ul><li>Facteurs des meilleurs rendements dans ces riziers? </li></ul>
  5. 5. Materials and Methods 0 100 km 200 SRI field Antananarivo Fianarantsoa km 0 Fianarantsoa to Antananarivo 15 30 Main road Maromby Mahazengy Ambalavao Tolongoina Ambalamerina Soatanana Ambatofutsi Conventional field Main city 1. A field survey Rendements et méthodes cultures dans les rizières SRI et conventionnelles 2. On-farm experiments Effets de chaque technique de SRI 3. Soil analysis Caractéristiques de la terre dans les rizières SRI et conventionnelles 14°S 16° 18° 20° 22° 24° 46° 44°E 48° 50° S1 S2 S3 C1 C2
  6. 6. 1. A field survey
  7. 7. Rendements et méthodes cultures dans les rizières SRI et conventionnelles
  8. 9. Champ de SRI Champ conventionnel
  9. 10. Similarité des techniques riziculture entre les lauréats aux concours du rendement du riz au Japon et les paysans SRI dans cette étude
  10. 11. 2. On-farm experiments
  11. 12. Traitement des expériences (en italiques ) aux 5 champs
  12. 13. Ketsa 8 andro SRI-W CF 26.7 pieds /m 2 16 pieds /m 2 Ketsa 1 volana S3 26.7 pieds /m 2 16 pieds /m 2
  13. 14. Rendement du riz au chaque traitement 17 % 12 % 8 % 26% 24%
  14. 15. Soil redox potential and plant N uptake between different water management More oxidative soil condition Maintenance of root activity at the later growth stage Larger N uptake from PI to maturity Shallow flooding
  15. 16. Insufficient compensation for the reduced panicles at the low-yielding fields
  16. 17. Conclusion de on-farm experiments <ul><li>L’effets des techniques SRI sur rendement </li></ul><ul><li>SRI-W; 17 % , Compost; 12 % </li></ul><ul><li>Ketsa 8 andro; 0~ 8 % </li></ul><ul><li>Repiquage spacieux; 0~ -25 % </li></ul><ul><li>Rendements sont augmente a un certain degre, </li></ul><ul><li>(mais) pas double ou triple que lequel conventionnel </li></ul><ul><li>Propriétés de la terre? </li></ul>
  17. 18. 3. Analyse de la terre 。
  18. 19. Propriétés de la terre SRI et conventionnel
  19. 20. Conclusion <ul><li>Rendement et méthodes riziculture aux champs du SRI </li></ul><ul><li>1. 9.9 t/ha au maximum, plus de double que conventionnel </li></ul><ul><li>2. Techniques du SRI, plus drainage et labour profond </li></ul><ul><li>Facteurs des meilleurs rendements dans ces rizières </li></ul><ul><li>1. La terre fertile, surtout azote minéral abondant </li></ul><ul><li>2. L’effets des techniques SRI </li></ul>
  20. 21. Champs du SRI dans cette étude Japon Records du concours au Japon Madagascar Changement du rendement du riz au Japon et Madagascar, et records du concours au Japon (FAOSTAT, 2004) Rendement (t/ha) Année
  21. 22. 2006. 12. 17, Tsimbahambo, Tolongoina voanjo Vary taona, transplanted Vary aloha, @ heading Vary aloha, harvested 390 m asl. 400 m asl.
  22. 23. Y (rendement) = f ( Xc, Xs, X t, Xw ) Xc; Méthode riziculture ( Variété, Date de repiquage, fertilisation, contra saison ) Xs; Propriétés de la terre ( SOC, Azote, Phosphore, CEC ) Xt; Topographie de la rizière ( altitude, accessibilité de irrigation) Xw; Conditions climatiques ( Température, Radiation du soleil ) Y am (rendement) = f ( Xc am , Xs am , X t, Xw ) Expérience des variétés, des dates de repiquage Evaluation de la matières organiques Remote sensing Recherche de la végétation locale Interview Analyse de la terre

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