0430 System of Rice Intensification (SRI)
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Transcript of 0430 System of Rice Intensification (SRI)
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System of Rice Intensification (SRI) System of Rice Intensification (SRI) An innovative technology to produce ‘more crop per drop’An innovative technology to produce ‘more crop per drop’
Slides from a powerpoint presentation made to theSlides from a powerpoint presentation made to the
workshop on SRI held at World Rice Research Conference,workshop on SRI held at World Rice Research Conference,
Tsukuba, Japan, November 7, 2004Tsukuba, Japan, November 7, 2004
Dr. A. SATYANARAYANADirector of Extension, Andhra Pradesh
Acharya N. G. Ranga Agricultural UniversityRajendranagar, Hyderabad, India
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On-farm evaluations of SRI in A.P.
ANGRAU DOAKharif 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
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SRI encourages rice plants to growwith 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
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Tillering is greatly increasedTillering 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
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PADDY YIELDS UNDER SRI IN COASTAL AREAS Kharif 2003-04, by district (kg/ha)
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Vj Sr Vz Wg Eg Kr Gn Pr
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PADDY YIELDS UNDER SRI IN TELANGANA AREA Kharif 2003-04, by district (kg/ha)
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Ma Ra Me Na Wa Kh Ka Ni Ad
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PADDY YIELDS UNDER SRI IN RAYALASEEMA REGION Kharif 2003-04, by district (kg/ha)
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Ku Ka An Ch
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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
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RR Mbnr Medk Kri Gun Pra WG EG Vizn Viz Kdp Kur Atp
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PADDY YIELDS UNDER SRI IN KHARIF 2004-05 ANGRAU trials, by district (kg/ha)
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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/ha10 t/ha
6 districts averaged over 6 districts averaged over 9 t/ha 9 t/ha
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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)
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Benefits of SRIBenefits 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
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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
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Swarna under SRI