0212 Opportunities for Rice Research and Production Deriving from the System of Rice Intensification (SRI) from Madagascar

Opportunities for Rice Research and Production Deriving from the System of Rice Intensification (SRI) from Madagascar Norman Uphoff Cornell International Institute for Food, Agriculture and Development

THEME is “OPPORTUNITIES” ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SRI IS A METHODOLOGY ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Basic idea of SRI is that RICE PLANTS DO BEST ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

“ Starting Points” for SRI ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OBSERVABLE BENEFITS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

LESS OR NO NEED FOR: ,[object Object],[object Object],[object Object]

FURTHER BENEFITS ,[object Object],[object Object],[object Object],[object Object]

DISADVANTAGES / COSTS ,[object Object],[object Object],[object Object]

SRI is COUNTERINTUITIVE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

These are remarkable claims ,[object Object],[object Object],[object Object],[object Object]

BACKGROUND ,[object Object],[object Object],[object Object],[object Object]

Spread beyond Madagascar ,[object Object],[object Object],[object Object],[object Object],[object Object]

Participants at the SRI Conference in Sanya, China

SIX PROPOSITIONS SUGGESTED BY SRI [possible new paradigm] ,[object Object],[object Object],[object Object]

Evidence on Root System Development/Degeneration ,[object Object],[object Object],[object Object]

Dry Matter Distribution of Roots in SRI and Conventionally-Grown Plants at Heading Stage (CNRRI research: Tao et al. 2002) Root dry weight (g)

Root Activity in SRI and Conventionally-Grown Rice (Nanjing Agr. Univ. research: Wang et al. 2002) (Wuxianggeng 9 variety)

(2) Tillering in rice is regulated by structural pattern of growth ,[object Object],[object Object],[object Object]

What speeds up the biological clock? (adapted from Nemoto et al. 1995) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

(3) Profuse tillering should not be considered unproductive ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

With a large and intact root system and profuse tillering ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

This is what makes it possible to go from 2 t/ha to 8 t/ha ,[object Object],[object Object],[object Object]

(4) Positive benefits are seen from soil aeration during the vegetative growth period

(5) SRI capitalizes on the fact that the uptake of N is a demand-led process

Paths for Increased Grain Yield in Relation to N Uptake, using QUEFTS Analytical Model (Barison, 2002)

Rapid tillering and root growth ,[object Object],[object Object],[object Object]

(6) The contributions of soil microbial activity should be considered more seriously ,[object Object]

Biological Nitrogen Fixation? ,[object Object],[object Object],[object Object],[object Object]

P SOLUBILIZATION? ,[object Object],[object Object],[object Object]

MYCORRHIZAL Contributions? ,[object Object],[object Object],[object Object]

Benefits from Rhizobia in rice now being explored ,[object Object],[object Object],[object Object]

ROOT EXUDATION ,[object Object],[object Object]

Larger canopies and root systems increase exudation and rhizodeposition ,[object Object],[object Object],[object Object],[object Object]

SRI Raises More Questions than It Gives ANSWERS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Plant Physical Structure and Light Intensity Distribution at Heading Stage (CNRRI Research: Tao et al. 2002)

Suggested Focuses for Explanation of SRI Effects ,[object Object],[object Object]

MANY OPPORTUNITIES ,[object Object],[object Object],[object Object],[object Object]

THANK YOU ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

0212 Opportunities for Rice Research and Production Deriving from the System of Rice Intensification (SRI) from Madagascar

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0212 Opportunities for Rice Research and Production Deriving from the System of Rice Intensification (SRI) from Madagascar