SlideShare une entreprise Scribd logo
1  sur  23
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
Eléments du SRI ,[object Object],[object Object],[object Object],[object Object],[object Object],Techniques intensives, origine au Madagascar dans 1980s
Controverses sur SRI   ,[object Object],[object Object],[object Object],[object Object],[object Object]
Objectifs ,[object Object],[object Object]
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
1. A field survey
Rendements et méthodes cultures dans les rizières SRI et conventionnelles
 
Champ de SRI Champ conventionnel
Similarité des techniques riziculture entre les lauréats aux concours du rendement du riz au Japon et les paysans SRI dans cette étude
2. On-farm experiments
Traitement des expériences (en  italiques ) aux 5 champs
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
Rendement du riz au chaque traitement 17 % 12 % 8 % 26% 24%
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
Insufficient compensation for the reduced panicles at the low-yielding fields
Conclusion de on-farm experiments ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3. Analyse de la terre 。
Propriétés de la terre SRI et conventionnel
Conclusion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
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
2006. 12. 17, Tsimbahambo, Tolongoina voanjo Vary taona, transplanted Vary aloha, @ heading Vary aloha, harvested 390 m asl. 400 m asl.
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

Contenu connexe

En vedette

En vedette (16)

0419 The System of Rice Intensification (SRI): An Update on Its Spread and E...
0419 The System of Rice Intensification (SRI):  An Update on Its Spread and E...0419 The System of Rice Intensification (SRI):  An Update on Its Spread and E...
0419 The System of Rice Intensification (SRI): An Update on Its Spread and E...
 
0856 Farmers’ Experience in the System of Rice Intensification
0856 Farmers’ Experience in the System of Rice Intensification0856 Farmers’ Experience in the System of Rice Intensification
0856 Farmers’ Experience in the System of Rice Intensification
 
0603 Reducing Water for Improving the Livelihoods & Ecosystems: Experiences f...
0603 Reducing Water for Improving the Livelihoods & Ecosystems: Experiences f...0603 Reducing Water for Improving the Livelihoods & Ecosystems: Experiences f...
0603 Reducing Water for Improving the Livelihoods & Ecosystems: Experiences f...
 
0845 Sharing of SRI Experience in Punjab
0845 Sharing of SRI Experience in Punjab0845 Sharing of SRI Experience in Punjab
0845 Sharing of SRI Experience in Punjab
 
0945 Does the System of Rice Intensification Outperform Conventional System? ...
0945 Does the System of Rice Intensification Outperform Conventional System? ...0945 Does the System of Rice Intensification Outperform Conventional System? ...
0945 Does the System of Rice Intensification Outperform Conventional System? ...
 
1043 Influence of System of Rice Intensification (SRI) practices on grain yie...
1043 Influence of System of Rice Intensification (SRI) practices on grain yie...1043 Influence of System of Rice Intensification (SRI) practices on grain yie...
1043 Influence of System of Rice Intensification (SRI) practices on grain yie...
 
0886 SRI: Experience and Evaluation
0886 SRI: Experience and Evaluation0886 SRI: Experience and Evaluation
0886 SRI: Experience and Evaluation
 
0761 Efficacy of Different Crop Establishment Methods on Yield and Economics ...
0761 Efficacy of Different Crop Establishment Methods on Yield and Economics ...0761 Efficacy of Different Crop Establishment Methods on Yield and Economics ...
0761 Efficacy of Different Crop Establishment Methods on Yield and Economics ...
 
1061 New Approaches With Dramitic Results for Increasing Production of Tef an...
1061 New Approaches With Dramitic Results for Increasing Production of Tef an...1061 New Approaches With Dramitic Results for Increasing Production of Tef an...
1061 New Approaches With Dramitic Results for Increasing Production of Tef an...
 
0947 System of Rice Intensification (SRI) under National Food Security Mission
0947 System of Rice Intensification  (SRI) under National Food Security Mission0947 System of Rice Intensification  (SRI) under National Food Security Mission
0947 System of Rice Intensification (SRI) under National Food Security Mission
 
0852 Promotion of System of Rice Intensification (SRI) in Rainfed Rice Cultiv...
0852 Promotion of System of Rice Intensification (SRI) in Rainfed Rice Cultiv...0852 Promotion of System of Rice Intensification (SRI) in Rainfed Rice Cultiv...
0852 Promotion of System of Rice Intensification (SRI) in Rainfed Rice Cultiv...
 
0874 Tripura State: The Role of Government and Panchyati Raj Institutions in ...
0874 Tripura State: The Role of Government and Panchyati Raj Institutions in ...0874 Tripura State: The Role of Government and Panchyati Raj Institutions in ...
0874 Tripura State: The Role of Government and Panchyati Raj Institutions in ...
 
1184-The Science behind SRI Practices
1184-The Science behind SRI Practices1184-The Science behind SRI Practices
1184-The Science behind SRI Practices
 
0881 System of Rice Intensification (SRI) in Orissa: Success at a Glance
0881 System of Rice Intensification  (SRI) in Orissa: Success at a Glance0881 System of Rice Intensification  (SRI) in Orissa: Success at a Glance
0881 System of Rice Intensification (SRI) in Orissa: Success at a Glance
 
0727 Impact of SRI in Combination with Effective Microorganism Technology
0727 Impact of SRI in Combination with Effective Microorganism Technology0727 Impact of SRI in Combination with Effective Microorganism Technology
0727 Impact of SRI in Combination with Effective Microorganism Technology
 
0893 Conventional Rice vs SRI - Prospects
0893  Conventional Rice vs SRI - Prospects0893  Conventional Rice vs SRI - Prospects
0893 Conventional Rice vs SRI - Prospects
 

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

Quelle prairie multi-espèces pour les chèvres de l'Ouest ? PSDR Flèche
Quelle prairie multi-espèces pour les chèvres de l'Ouest ? PSDR FlècheQuelle prairie multi-espèces pour les chèvres de l'Ouest ? PSDR Flèche
Quelle prairie multi-espèces pour les chèvres de l'Ouest ? PSDR FlècheInstitut de l'Elevage - Idele
 
Enjeux et défis en matière de communication pour les techniques d'agriculture...
Enjeux et défis en matière de communication pour les techniques d'agriculture...Enjeux et défis en matière de communication pour les techniques d'agriculture...
Enjeux et défis en matière de communication pour les techniques d'agriculture...Eldoux
 
Diagnostic du mode de gestion de la fertilité des sols
Diagnostic du mode de gestion de la fertilité des sols Diagnostic du mode de gestion de la fertilité des sols
Diagnostic du mode de gestion de la fertilité des sols Christin CALIXTE
 
Améliorer l’efficacité de l’acide gibbérellique pour augmenter la nouaison et...
Améliorer l’efficacité de l’acide gibbérellique pour augmenter la nouaison et...Améliorer l’efficacité de l’acide gibbérellique pour augmenter la nouaison et...
Améliorer l’efficacité de l’acide gibbérellique pour augmenter la nouaison et...inventionjournals
 
Investment in Niger to meet the challenges posed by hunger and poverty (French)
Investment in Niger to meet the challenges posed by hunger and poverty (French)Investment in Niger to meet the challenges posed by hunger and poverty (French)
Investment in Niger to meet the challenges posed by hunger and poverty (French)ICRISAT
 
[Biennales 23] Mettre des essais en fermes : comment, quelles utilisations, i...
[Biennales 23] Mettre des essais en fermes : comment, quelles utilisations, i...[Biennales 23] Mettre des essais en fermes : comment, quelles utilisations, i...
[Biennales 23] Mettre des essais en fermes : comment, quelles utilisations, i...Institut de l'Elevage - Idele
 
Atelier 6: Présentation du groupe fourrage régional
Atelier 6: Présentation du groupe fourrage régionalAtelier 6: Présentation du groupe fourrage régional
Atelier 6: Présentation du groupe fourrage régionalInstitut de l'Elevage - Idele
 
Legumineuses transfert de technologie n°64
Legumineuses transfert de technologie n°64Legumineuses transfert de technologie n°64
Legumineuses transfert de technologie n°64Mohamed Ghajaoui
 
LUXEMBOURG CREATIVE 2017 : Perséphone
LUXEMBOURG CREATIVE 2017 : PerséphoneLUXEMBOURG CREATIVE 2017 : Perséphone
LUXEMBOURG CREATIVE 2017 : PerséphoneLUXEMBOURG CREATIVE
 

Similaire à 0756 SRI au Madagascar: Rendement, Méthodes Riziculture, et des Facteurs de Meilleur Rendement dans les Rizières de SRI (20)

1287-Le Système de Riziculture Intensive Applications à travers le monde
1287-Le Système de Riziculture Intensive Applications à travers le monde1287-Le Système de Riziculture Intensive Applications à travers le monde
1287-Le Système de Riziculture Intensive Applications à travers le monde
 
Atelier 2 - Les technologies au service de la nutrition des plantes : Présent...
Atelier 2 - Les technologies au service de la nutrition des plantes : Présent...Atelier 2 - Les technologies au service de la nutrition des plantes : Présent...
Atelier 2 - Les technologies au service de la nutrition des plantes : Présent...
 
Quelle prairie multi-espèces pour les chèvres de l'Ouest ? PSDR Flèche
Quelle prairie multi-espèces pour les chèvres de l'Ouest ? PSDR FlècheQuelle prairie multi-espèces pour les chèvres de l'Ouest ? PSDR Flèche
Quelle prairie multi-espèces pour les chèvres de l'Ouest ? PSDR Flèche
 
1297-Test du Système de Riziculture Intensive au Niger Campagne Saison Seche ...
1297-Test du Système de Riziculture Intensive au Niger Campagne Saison Seche ...1297-Test du Système de Riziculture Intensive au Niger Campagne Saison Seche ...
1297-Test du Système de Riziculture Intensive au Niger Campagne Saison Seche ...
 
Les prairies multi-espèces du REDCap - synthèse
Les prairies multi-espèces du REDCap - synthèseLes prairies multi-espèces du REDCap - synthèse
Les prairies multi-espèces du REDCap - synthèse
 
1286-Le Système de Riziculture Intensif (SRI) en Afrique
1286-Le Système de Riziculture Intensif (SRI) en Afrique1286-Le Système de Riziculture Intensif (SRI) en Afrique
1286-Le Système de Riziculture Intensif (SRI) en Afrique
 
Enjeux et défis en matière de communication pour les techniques d'agriculture...
Enjeux et défis en matière de communication pour les techniques d'agriculture...Enjeux et défis en matière de communication pour les techniques d'agriculture...
Enjeux et défis en matière de communication pour les techniques d'agriculture...
 
Diagnostic du mode de gestion de la fertilité des sols
Diagnostic du mode de gestion de la fertilité des sols Diagnostic du mode de gestion de la fertilité des sols
Diagnostic du mode de gestion de la fertilité des sols
 
REDCap - présentation des résultats PME3
REDCap - présentation des résultats PME3REDCap - présentation des résultats PME3
REDCap - présentation des résultats PME3
 
1036 Le Système de Riziculture Intensive: Produire Plus en Utilisant Moins
1036 Le Système de Riziculture Intensive: Produire Plus en Utilisant Moins1036 Le Système de Riziculture Intensive: Produire Plus en Utilisant Moins
1036 Le Système de Riziculture Intensive: Produire Plus en Utilisant Moins
 
Améliorer l’efficacité de l’acide gibbérellique pour augmenter la nouaison et...
Améliorer l’efficacité de l’acide gibbérellique pour augmenter la nouaison et...Améliorer l’efficacité de l’acide gibbérellique pour augmenter la nouaison et...
Améliorer l’efficacité de l’acide gibbérellique pour augmenter la nouaison et...
 
1296-Presentation du Mali
1296-Presentation du Mali1296-Presentation du Mali
1296-Presentation du Mali
 
Totagp
TotagpTotagp
Totagp
 
Investment in Niger to meet the challenges posed by hunger and poverty (French)
Investment in Niger to meet the challenges posed by hunger and poverty (French)Investment in Niger to meet the challenges posed by hunger and poverty (French)
Investment in Niger to meet the challenges posed by hunger and poverty (French)
 
[Biennales 23] Mettre des essais en fermes : comment, quelles utilisations, i...
[Biennales 23] Mettre des essais en fermes : comment, quelles utilisations, i...[Biennales 23] Mettre des essais en fermes : comment, quelles utilisations, i...
[Biennales 23] Mettre des essais en fermes : comment, quelles utilisations, i...
 
Atelier 6: Présentation du groupe fourrage régional
Atelier 6: Présentation du groupe fourrage régionalAtelier 6: Présentation du groupe fourrage régional
Atelier 6: Présentation du groupe fourrage régional
 
Legumineuses transfert de technologie n°64
Legumineuses transfert de technologie n°64Legumineuses transfert de technologie n°64
Legumineuses transfert de technologie n°64
 
LUXEMBOURG CREATIVE 2017 : Perséphone
LUXEMBOURG CREATIVE 2017 : PerséphoneLUXEMBOURG CREATIVE 2017 : Perséphone
LUXEMBOURG CREATIVE 2017 : Perséphone
 
1290-Le SRI au Bénin
1290-Le SRI au Bénin1290-Le SRI au Bénin
1290-Le SRI au Bénin
 
Jto 2020 15oct e agroforesterie beral
Jto 2020 15oct e  agroforesterie beralJto 2020 15oct e  agroforesterie beral
Jto 2020 15oct e agroforesterie beral
 

Plus de SRI-Rice, Dept. of Global Development, CALS, Cornell University

Plus de SRI-Rice, Dept. of Global Development, CALS, Cornell University (20)

2205 - System of Rice Intensification in Indonesia - Research, Adoption, and ...
2205 - System of Rice Intensification in Indonesia - Research, Adoption, and ...2205 - System of Rice Intensification in Indonesia - Research, Adoption, and ...
2205 - System of Rice Intensification in Indonesia - Research, Adoption, and ...
 
2204 -System of Rice Intensification - Improving Rice Production and Saving W...
2204 -System of Rice Intensification - Improving Rice Production and Saving W...2204 -System of Rice Intensification - Improving Rice Production and Saving W...
2204 -System of Rice Intensification - Improving Rice Production and Saving W...
 
2203 - Overview of System of Rice Intensification SRI Around the World
2203 - Overview of System of Rice Intensification SRI Around the World2203 - Overview of System of Rice Intensification SRI Around the World
2203 - Overview of System of Rice Intensification SRI Around the World
 
2202 - Water Savings, Yield, and Income Benefits with SRI in Iraq.ppt
2202 - Water Savings, Yield, and Income Benefits with SRI in Iraq.ppt2202 - Water Savings, Yield, and Income Benefits with SRI in Iraq.ppt
2202 - Water Savings, Yield, and Income Benefits with SRI in Iraq.ppt
 
2201 - El Sistema Intensivo del Cultivo de Arroz
2201 - El Sistema Intensivo del Cultivo de Arroz2201 - El Sistema Intensivo del Cultivo de Arroz
2201 - El Sistema Intensivo del Cultivo de Arroz
 
2104 - El Sector Agropecuario Panameno Contribuyendo a la Lucha Frente al Cam...
2104 - El Sector Agropecuario Panameno Contribuyendo a la Lucha Frente al Cam...2104 - El Sector Agropecuario Panameno Contribuyendo a la Lucha Frente al Cam...
2104 - El Sector Agropecuario Panameno Contribuyendo a la Lucha Frente al Cam...
 
2103 - Reduced Methane Emissions Rice Production Project in Northern Nigerian...
2103 - Reduced Methane Emissions Rice Production Project in Northern Nigerian...2103 - Reduced Methane Emissions Rice Production Project in Northern Nigerian...
2103 - Reduced Methane Emissions Rice Production Project in Northern Nigerian...
 
1711 - Sistema Intensivo del Cultivo del Arroz para la Producción y Sustentab...
1711 - Sistema Intensivo del Cultivo del Arroz para la Producción y Sustentab...1711 - Sistema Intensivo del Cultivo del Arroz para la Producción y Sustentab...
1711 - Sistema Intensivo del Cultivo del Arroz para la Producción y Sustentab...
 
1615 Ecological Intensification - Lessons from SRI from Green Revolution to...
1615   Ecological Intensification - Lessons from SRI from Green Revolution to...1615   Ecological Intensification - Lessons from SRI from Green Revolution to...
1615 Ecological Intensification - Lessons from SRI from Green Revolution to...
 
2102 - Establishing an equitable SRI value chain in the Philippines
2102 - Establishing an equitable SRI value chain in the Philippines2102 - Establishing an equitable SRI value chain in the Philippines
2102 - Establishing an equitable SRI value chain in the Philippines
 
2101 - Agroecological Opportunities with SRI and SCI
2101 - Agroecological Opportunities with SRI and SCI2101 - Agroecological Opportunities with SRI and SCI
2101 - Agroecological Opportunities with SRI and SCI
 
Farmers' Handbook on System of Rice Intensification - SRI (Burmese)
Farmers' Handbook on System of Rice Intensification - SRI (Burmese)Farmers' Handbook on System of Rice Intensification - SRI (Burmese)
Farmers' Handbook on System of Rice Intensification - SRI (Burmese)
 
2001 - System of Rice Intensification SRI in Iraq
2001 - System of Rice Intensification SRI in Iraq2001 - System of Rice Intensification SRI in Iraq
2001 - System of Rice Intensification SRI in Iraq
 
1914 Towards a More Sustainable Rice Crop: System of Rice Intensification (SR...
1914 Towards a More Sustainable Rice Crop: System of Rice Intensification (SR...1914 Towards a More Sustainable Rice Crop: System of Rice Intensification (SR...
1914 Towards a More Sustainable Rice Crop: System of Rice Intensification (SR...
 
1913 Resuitados SRI MIDA-IICA Panama 2019
1913   Resuitados SRI MIDA-IICA Panama 2019 1913   Resuitados SRI MIDA-IICA Panama 2019
1913 Resuitados SRI MIDA-IICA Panama 2019
 
1912 - Agroecological Management of Soil Systems for Food, Water, Climate Res...
1912 - Agroecological Management of Soil Systems for Food, Water, Climate Res...1912 - Agroecological Management of Soil Systems for Food, Water, Climate Res...
1912 - Agroecological Management of Soil Systems for Food, Water, Climate Res...
 
1910 - Integrating Climate Smart Rice Agriculture in Supply Networks - Lotus ...
1910 - Integrating Climate Smart Rice Agriculture in Supply Networks - Lotus ...1910 - Integrating Climate Smart Rice Agriculture in Supply Networks - Lotus ...
1910 - Integrating Climate Smart Rice Agriculture in Supply Networks - Lotus ...
 
1911- Gender Responsive Smallholder Rice Production Practices and equipment
1911- Gender Responsive Smallholder Rice Production Practices and equipment1911- Gender Responsive Smallholder Rice Production Practices and equipment
1911- Gender Responsive Smallholder Rice Production Practices and equipment
 
1908 Rice cultivation in Africa: How traditional practices relate to modern o...
1908 Rice cultivation in Africa: How traditional practices relate to modern o...1908 Rice cultivation in Africa: How traditional practices relate to modern o...
1908 Rice cultivation in Africa: How traditional practices relate to modern o...
 
1907 - The Effects of Exposure Intensity on Technology Adoption and Gains: Ex...
1907 - The Effects of Exposure Intensity on Technology Adoption and Gains: Ex...1907 - The Effects of Exposure Intensity on Technology Adoption and Gains: Ex...
1907 - The Effects of Exposure Intensity on Technology Adoption and Gains: Ex...
 

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

  • 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.
  • 3.
  • 4.
  • 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. 1. A field survey
  • 7. Rendements et méthodes cultures dans les rizières SRI et conventionnelles
  • 8.  
  • 9. Champ de SRI Champ conventionnel
  • 10. Similarité des techniques riziculture entre les lauréats aux concours du rendement du riz au Japon et les paysans SRI dans cette étude
  • 12. Traitement des expériences (en italiques ) aux 5 champs
  • 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
  • 14. Rendement du riz au chaque traitement 17 % 12 % 8 % 26% 24%
  • 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
  • 16. Insufficient compensation for the reduced panicles at the low-yielding fields
  • 17.
  • 18. 3. Analyse de la terre 。
  • 19. Propriétés de la terre SRI et conventionnel
  • 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
  • 22. 2006. 12. 17, Tsimbahambo, Tolongoina voanjo Vary taona, transplanted Vary aloha, @ heading Vary aloha, harvested 390 m asl. 400 m asl.
  • 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

Notes de l'éditeur

  1. Today, I’d like to present my field research I conducted in Madagascar in these two years. The title is A study on SRI in the central highland of Madagascar, and as a subtitle, I put rice yields, rice cultivation management and high yielding factors of SRI farms. So let me start now.
  2. Je d'abord montre les elements du SRI. Je pense que vous les connaissez bien, mais j'explique un peu. Premiere element, ca c'est~ 2em element,~ 3em element, on utilise beaucoup de fumier comme compost. 4em element,~ , donc on fait irrigation pas toujours, mais on fais la terre repetivement mouille et seche, mouille seche pendants la croissance vegetative.Ca vous dire on doit controler de l'eau bien. 5em~
  3. Et sur cette SRI qui etait developpe ici au Madagascar, il y a beaucoup de discussion dans le monde. Quelques supporteurs disent que~ ou bien,~ Ils disent que cette SRI sera une solution de la stagnation du productivite du riz dans le monde. Pendants a peu pres ces dix ans, le rendement du riz dans le monde augmente pas presque rien, et la production du riz par tete maintenant diminue a meme niveau que cella des annees 1980s. Mais, il y a aussi beaucoup de scientist , surtout IRRI sont negatif sur SRI.. Ils disent que c'est pas vrais. C'est faux!
  4. Comme les scientists quis sont negatif sur SRI disent, il'y a quelques questions on doit repondre. ce sont ~, et ~.
  5. We conducted 3 experiments below, in the central highland of Madagascar, mainly in the region of Fianarantsoa. We selected 4 SRI and 4 conventional fields, and during the harvest season in 2005, we measured the rough grain yields at each paddy field, and interviewed farmers on their rice cultivation management. For the second experiment, we conducted on-farm experiments at 3 SRI fields, S1, S2 and S3, where we did a field survey, and 2 conventional fields, C1 and C2, which are adjacent to the SRI fields of S1 and S2. For the third experiment, we analyzed the soil chemical properties of all the survey and experimental fields taken from the depth of 0-15cm and 15-30cm.
  6. In the result of the field survey,
  7. We compared the rice yields and rice-cultivation management practices at each SRI and conventional field. The yield measurement at Ambatofutsi was not conducted because of the heavy damage from blast disease. When we look at the yields at the other fields, two of the SRI fields obtained almost 10 t/ha of rice yields, and the yield at the SRI fields were over twice as great as conventional yield on average. Either improved or local varieties were cultivated in both of SRI and conventional fields. As for the transplanting methods, relatively young seedlings were transplanted with wide spacing at SRI fields. Cow dung or compost was applied at all the SRI fields, and two of the conventional fields. At the SRI fields, SRI-water management, which is intermittent irrigation during the vegetative growth stage fallowed by shallow flooding, or shallow flooding through the whole growth period was conducted. These fields had good irrigation and drainage system. Weed control was more frequently done in the SRI fields. And in all the SRI fields, deep plowing was practiced
  8. Here are the photos of management practices which were observed in the SRI fields.Sparse transplanting of young seedlings, compost application, deep plowing, and building a drainage system.
  9. Here’s the picture of SRI field at maturity on the left, and a conventional field on the right.
  10. As a result of field survey, we found a close similarity of rice-cultivation management practices between SRI farmers in this study and the winners of rice-yield contest held in Japan, back in 1950s and 60s. Organic amendments and intermittent irrigation, which are key techniques of SRI, and deep plowing and drainage, which were observed in the survey fields were also conducted by yield-contest winners in Japan.
  11. We conducted on-farm experiments on the effect of SRI techniques in the season of 2005-2006.
  12. We selected 3 SRI fields, S1, S2 and S3, and 2 conventional fields, C1 and C2. As for the treatments, we designed 2 different seedling-age practices, young seedlings and middle-aged seedlings, and two different transplanting patterns, sparse transplanting and dense transplanting at all the 5 fields. In addition to these two treatments, the plot with compost and the plot without any fertilization were made at S2, and the plot with SRI-water management and the plot with continuous flooding were made at S3. Weed control was frequently done at all the fields. All the treatments were replicated twice.
  13. This is a photo of one experimental field. SRI-water management was conducted on the left, and the right plot was continuously flooded. On the upper side of the field, young seedling was transplanted in a transplanting density of 16 hills m-2 and 26.7 hills m-2. On the lower side, middle-aged seedlings were transplanted likewise.
  14. First, we look at the yield of each fields, and there was large yield difference among the experimental fields from 2.4 t/ha at C1 and 9.0t/ha at S3. The result of ANOVA test for the effect of each treatment on rice yields are also shown in this table. SRI-water management and compost application increased rice yields by 17 %, and by 12 %, respectively, although these treatments were only made at one field. The effect of seedling age was not significant at the 4 fields, but transplanting young seedlings increased the yields by 8 % at S2. Sparse transplanting had no effects on yields at S1, S2 and S3, where yields were relatively high, but it decreased yields at C1 and C2 by 25 %, where yields were relatively low.
  15. We conducted further analysis how SRI water-management increased rice yield, in respects of soil redox potential and plant nitrogen uptake, but it’s too in detail, so let me skip this.
  16. I skip this, too.
  17. This table shows the amount of organic matter, mineralizable nitrogen, available phosphorus and cation exchange capacity in the soil of all the study fields. When we look at the organic matter content, the SRI fields have relatively great organic matter compared to conventional fields. When we further look at this organic matter for upper soil layer and deep soil layer separately, the amounts decreased at the deep soil layer in the conventional fields, but the value was maintained at the SRI fields. This indicates that large amount of organic matter from upper to deep soil layer exist at the SRI fields. The amount of mineralizable nitrogen was also doubled in SRI fields on average. We found several conventional fields which had very low amount of available phosphorus or low CEC, but these values were high in all the SRI fields.
  18. This research was done only for very small number of fields, and SRI techniques were not fully evaluated at all. but clarifying high-yielding factors of the fields where farmers obtain very high yields with no chemical fertilizer might be an useful approach to improve and sustain yields of resource-limited fields, as Japan increased its national yield average partly by learning the techniques of rice-yield contest winners in 1950s and 60s.