0430 System of Rice Intensification (SRI)

System of Rice Intensification (SRI) An innovative technology to produce ‘more crop per drop’ Slides from a powerpoint presentation made to the workshop on SRI held at World Rice Research Conference, Tsukuba, Japan, November 7, 2004 Dr. A. SATYANARAYANA Director of Extension, Andhra Pradesh Acharya N. G. Ranga Agricultural University Rajendranagar, Hyderabad, India

On-farm evaluations of SRI in A.P. ANGRAU DOA Kharif 2003-04 200 500 Rabi 2003-04 > 2000 Volunteer farmers with larger areas Kharif 2004-05 250 800 Rabi 2004-05 250 + Thousands of volunteer farmers

SRI encourages rice plants to grow
with more health and vigor, because:
Large root volume
Profuse and strong tillers
Non-lodging
Big panicle
More and well-filled spikelets, and higher grain weight
Resists insects because methods allow rice to grow naturally

Tillering is greatly increased
30 tillers per plant are fairly easy to achieve
50 tillers per plant are quite attainable
With really good use of SRI, individual plants can have 100 fertile tillers or even more
No set-back to plant growth due to early and careful transplanting and no die-back of plant roots
Maximum tillering occurs concurrently with panicle initiation
With SRI, positive correlation is found between the number of panicles per plant and number of grains per panicle, contrary to what is seen with flooded rice

PADDY YIELDS UNDER SRI IN COASTAL AREAS Kharif 2003-04, by district (kg/ha)

PADDY YIELDS UNDER SRI IN TELANGANA AREA Kharif 2003-04, by district (kg/ha)

PADDY YIELDS UNDER SRI IN RAYALASEEMA REGION Kharif 2003-04, by district (kg/ha)

Performance of SRI in AP, Kharif season 2004 (ANGRAU) No. of trials 194 SRI 7.6 t/ha Conventional 5.9 t/ha SRI advantage = 1.7 t/ha

PADDY YIELDS UNDER SRI IN KHARIF 2004-05 ANGRAU trials, by district (kg/ha)

Performance of SRI in Kharif 2003-04 Trials organized by State DOA No. of trials - 476 Average SRI yield (t/ha) - 7.92 Control (t/ha) - 5.48 State average productivity (t/ha) - 3.01 2 districts averaged over 10 t/ha 6 districts averaged over 9 t/ha

Performance of Rice under SRI, Rabi 2003-04 No. of trials (data reported so far) 94 Ave. SRI yield (kg/ha) 9,669 Ave. conventional yield (kg/ha) 7,125 SRI yield advantage (kg/ha) 2,554 Highest yield recorded under SRI (kg/ha) 16,250 (harvested yield from 9 acre extent – see picture)

Benefits of SRI 1. Higher yields – Both grain and straw 2. Reduced duration (by 10 days) 3. Lesser chemical inputs 4. Less water requirement 5. Less chaffy grain % 6. Grain weight increased without change in grain size 7. Higher head rice recovery 8. Withstand cyclonic gales 9. Cold tolerance 10. Soil health improves through biological activity 11. Drought tolerance

SRI has potential to achieve super high yields
The potential of young seedlings, wider spacing, less water, tillage, organic matter in improving root growth and microorganism and yield is known,
but why then is SRI not accepted as scientific?
Do not dismiss SRI with misconceptions
Farmers’ experiences on large areas and under diverse conditions should be taken seriously

Swarna under SRI

0430 System of Rice Intensification (SRI)

by SRI-Rice, CIIFAD, Cornell University

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0430 System of Rice Intensification (SRI) Presentation Transcript