0430 System of Rice Intensification (SRI)

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

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

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

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

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

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

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

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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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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/ha10 t/ha

6 districts averaged over 6 districts averaged over 9 t/ha 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 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

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