Individual and combined effect of management components of SRI on the productivity of irrigated rice   R. Rajendran*, V. R...
SRI  Modified SRI <ul><li>Management practices tailored to the local conditions </li></ul><ul><li>Practiced in different n...
Practices recommended  for  SRI Practices Seedling age (days) 15  Seedlings per hill 1 Plant spacing (cm) 22.5 x 22.5 Plan...
Objectives <ul><li>To study the individual effect of  SRI  components  on rice productivity </li></ul><ul><li>To study the...
Experimental details <ul><li>Locations (2)  :  TRRI, Aduthurai, TN, India </li></ul><ul><li>SWMRI, Thanjavur, TN, India </...
Treatment details   <ul><li>YOSCI  (SRI) </li></ul><ul><li>YOSC F </li></ul><ul><li>YOS H I </li></ul><ul><li>YO RH I </li...
TRRI, Aduthurai Yield enhanced  by 29% SWMRI, Thanjavur Yield enhanced  by 46% Impact  of  inter-cultivation on yield,  Ca...
Impact of SRI +SSNM on irrigated rice productivity, Cauvery Delta,  Kharif and rabi 2003- 04 Prob >F :  F0, 0.07; LCCN, 0....
<ul><ul><li>Dominating  Pests </li></ul></ul><ul><ul><li>-- Leaf folder  </li></ul></ul>
Impact of SRI on pest incidence Ravi et al., 2006 Detail No. of valid seasons Conven-tional planting SRI method of plantin...
SRI  + SSNM on N use efficiency, Cauvery Delta, Kharif and Rabi, 2003-04 Prob > F :  For LCC-N  & + K, 0.02   Rajendran  e...
Components  of  chlorophyll  as  influenced  by  SRI  practices, Kharif, 2005* *  Mean data Management / Variety   Chlorop...
Root growth as influenced by  SRI  (inter-cultivation), Kharif, 2006* *  On-going experiment Treatments Root length (cm) R...
Nutrient uptake (kg/ha), TRRI Farm, Cauvery Delta, Kharif,   2005*  *   On-going research project Treatment Grain  Straw N...
TRRI, Aduthurai Yield reduced  by 23% SWMRI, Thanjavur Yield reduced  by 18% Impact of older seedling age, Cauvery Delta, ...
Rajendran  et al ., 2005 Seedling age on  rice productivity and profit, Cauvery Delta, Tamil  Nadu,  Rabi, 2002-03 *  % yi...
Influence of seedling age when planted, based on  leaf number, Cauvery Delta, Kharif 2006 & Kharif 2007  (in progress)
Panicle production No. of leaves  per seedling  Panicles / sq. m ADT 43 PHB 71 Seedling mean 2  391 404 398 3  438 456 447...
Rice grain yield  No. of leaves  per seedling  Grain yield (kg/ha) ADT 43 PHB 71 Seedling mean 2  7595 7903 7749 3  9198 9...
TRRI, Aduthurai Yield reduced  by 17% SWMRI, Thanjavur Yield reduced  by 16% Impact of flooding, Cauvery Delta, Tamil Nadu...
Synergistic effect of SRI on rice productivity, Cauvery Delta,  Tamil Nadu, 2002 - 04 TRRI, Aduthurai Yield enhanced  by 5...
Factor productivity for SRI and conventional  rice cultivation, kharif and rabi ,  Cauvery Delta,  Tamil Nadu, 2002-04 Inp...
Factor productivity for SRI and conventional  rice cultivation, kharif and rabi ,  2002- 04,  Cauvery Delta, Tamil Nadu In...
Targeted yield attributes for enhanced grain yield in SRI Yield attributes Role of M SRI 1.  No. of panicles/m 2  2 . No. ...
Targeted yield attributes for enhanced  grain yield in SRI Yield attributes Role of Modified SRI 3.  Increased no. of spik...
Improved grain quality in SRI   Cauvery Delta,  Kharif, 2005 Treatments Grain length (mm) Grain width (mm) Kernel length (...
What to do? <ul><li>For farmer-friendly and faster adoption of SRI: </li></ul><ul><li>Strengthening of nursery & water man...
Key  is the healthy crop establishment
T h a n k  y o u
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0737 Individual and Combined Effect of Management Components of SRI on the Productivity of Irrigated Rice

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Presenter: R. Rajendran, V. Ravi, N.Chelliah, and V. Balasubramanian

Audience: 2nd National SRI Symposium, Agartala, India

Subject Country: India

Published in: Technology, Business
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0737 Individual and Combined Effect of Management Components of SRI on the Productivity of Irrigated Rice

  1. 1. Individual and combined effect of management components of SRI on the productivity of irrigated rice R. Rajendran*, V. Ravi, N.Chelliah, and V. Balasubramanian * Professor (Agronomy), Tamil Nadu Rice Research Institute (TNAU), Aduthurai, India
  2. 2. SRI Modified SRI <ul><li>Management practices tailored to the local conditions </li></ul><ul><li>Practiced in different names - countries/region </li></ul><ul><li>As “modified SRI” in Tamil Nadu </li></ul><ul><li>Initiated from 2002 in Cauvery Delta, Tamil Nadu </li></ul>
  3. 3. Practices recommended for SRI Practices Seedling age (days) 15 Seedlings per hill 1 Plant spacing (cm) 22.5 x 22.5 Planting geometry Square Mechanical weeding/ soil stirring Two cono/rotary weeder + one HW (no herbicide) Intermittent irrigation 2.5 cm up to flowering intermittently Nutrient application OM + fertilizers
  4. 4. Objectives <ul><li>To study the individual effect of SRI components on rice productivity </li></ul><ul><li>To study the synergistic effect of SRI practices </li></ul><ul><li>To assess the factor productivity in SRI </li></ul>
  5. 5. Experimental details <ul><li>Locations (2) : TRRI, Aduthurai, TN, India </li></ul><ul><li>SWMRI, Thanjavur, TN, India </li></ul><ul><li>Year : 2002 - 2004 </li></ul><ul><li>Variety : ADT- R 45 (110 d ) </li></ul><ul><li>Design : CRBD </li></ul><ul><li>Replication : 3 </li></ul><ul><li>Treatments : 13 </li></ul>
  6. 6. Treatment details <ul><li>YOSCI (SRI) </li></ul><ul><li>YOSC F </li></ul><ul><li>YOS H I </li></ul><ul><li>YO RH I </li></ul><ul><li>Y M SCI </li></ul><ul><li>A OSCI </li></ul><ul><li>AMRHI </li></ul><ul><li>Y MRHI </li></ul><ul><li>A ORHI </li></ul><ul><li>A O SHI </li></ul><ul><li>AM SC I </li></ul><ul><li>AMSH I </li></ul><ul><li>AMRHF (conventional) </li></ul><ul><li>Y - Young seedling (15 d ) </li></ul><ul><li>A - Aged seedling (25 d) </li></ul><ul><li>O - One seedling/hill </li></ul><ul><li>M - Multiple seedlings hill -1 </li></ul><ul><li>S - Square planting (22.5 x 22.5cm) </li></ul><ul><li>R - Row planting (15x10 cm) </li></ul><ul><li>C - Cono weeding </li></ul><ul><li>H - Hand weeding </li></ul><ul><li>I - Intermittent irrigation </li></ul><ul><li>F - Flooding </li></ul>
  7. 7. TRRI, Aduthurai Yield enhanced by 29% SWMRI, Thanjavur Yield enhanced by 46% Impact of inter-cultivation on yield, Cauvery Delta, Tamil Nadu, 2002-04
  8. 8. Impact of SRI +SSNM on irrigated rice productivity, Cauvery Delta, Kharif and rabi 2003- 04 Prob >F : F0, 0.07; LCCN, 0.02 and +K, 0.02 Rajendran et al ., 2006
  9. 9. <ul><ul><li>Dominating Pests </li></ul></ul><ul><ul><li>-- Leaf folder </li></ul></ul>
  10. 10. Impact of SRI on pest incidence Ravi et al., 2006 Detail No. of valid seasons Conven-tional planting SRI method of planting Pest incidence Whorl maggot (%LD) 5 11.56 4.82 Leaf folder (% LD) 8 12.97 21.04 Gall midge (% DT) 2 4.52 2.72 BPH (no./hill) 4 7.52 1.84 Stem borer (% DT) 6 9.86 5.48 Crop yield (kg/ha) Grain yield 8 5,127 6,986
  11. 11. SRI + SSNM on N use efficiency, Cauvery Delta, Kharif and Rabi, 2003-04 Prob > F : For LCC-N & + K, 0.02 Rajendran et al ., 2006
  12. 12. Components of chlorophyll as influenced by SRI practices, Kharif, 2005* * Mean data Management / Variety Chlorophyll (a: b ratio) ADT 43 ADT RH 1 Conv. + flooding 1.27:1 1.21:1 Conv. + intermittent irrigation 1.33:1 1.43:1 SRI + flooding 1.52:1 1.34:1 SRI + intermitt. irrig. 1.56:1 1.59:1
  13. 13. Root growth as influenced by SRI (inter-cultivation), Kharif, 2006* * On-going experiment Treatments Root length (cm) Root volume (cc) ADT 43 PHB 71 ADT 43 PHB 71 Conv. + flooding 11.6 12.0 21.8 19.3 Conv. + inter. irrig. 15.2 15.1 23.3 26.3 SRI + flooding 16.3 16.1 37.7 39.2 SRI + inter. irrig. 16.5 16.5 51.0 57.7 CD (5%) 0.7 4.0
  14. 14. Nutrient uptake (kg/ha), TRRI Farm, Cauvery Delta, Kharif, 2005* * On-going research project Treatment Grain Straw N P K N P K Conventional 57.0 7.9 8.7 32.6 5.9 68.7 SRI 74.1 11.0 11.3 43.7 7.8 87.0 C.D. (5%) 4.4 0.7 1.5 4.2 1.3 10.4
  15. 15. TRRI, Aduthurai Yield reduced by 23% SWMRI, Thanjavur Yield reduced by 18% Impact of older seedling age, Cauvery Delta, Tamil Nadu, 2002 -04
  16. 16. Rajendran et al ., 2005 Seedling age on rice productivity and profit, Cauvery Delta, Tamil Nadu, Rabi, 2002-03 * % yield increase over aged seedling Seedling age Aduthurai Thanjavur Panicles/m 2 GY (kg/ha) B:C Panicles/m 2 GY (kg/ha) B:C Traditional nursery – 25 days 377 5874 2.6 344 5557 1.9 Modified mat nursery 15 days 452 7061* (20) 3.2 424 6583* (16) 2.7 C.D (5%) 25 163 n. a 21 121 n. a
  17. 17. Influence of seedling age when planted, based on leaf number, Cauvery Delta, Kharif 2006 & Kharif 2007 (in progress)
  18. 18. Panicle production No. of leaves per seedling Panicles / sq. m ADT 43 PHB 71 Seedling mean 2 391 404 398 3 438 456 447 4 397 423 410 5 350 402 376 Cultivar mean 403 425 C.D. (5%) 10 15
  19. 19. Rice grain yield No. of leaves per seedling Grain yield (kg/ha) ADT 43 PHB 71 Seedling mean 2 7595 7903 7749 3 9198 9457 9327 4 8016 8762 8889 5 7297 8299 7798 Cultivar mean 8277 8598 C.D. (5%) 145 230
  20. 20. TRRI, Aduthurai Yield reduced by 17% SWMRI, Thanjavur Yield reduced by 16% Impact of flooding, Cauvery Delta, Tamil Nadu 2002 -04
  21. 21. Synergistic effect of SRI on rice productivity, Cauvery Delta, Tamil Nadu, 2002 - 04 TRRI, Aduthurai Yield enhanced by 51% SWMRI, Thanjavur Yield enhanced by 46%
  22. 22. Factor productivity for SRI and conventional rice cultivation, kharif and rabi , Cauvery Delta, Tamil Nadu, 2002-04 Input use/cost Aduthurai Thanjavur SRI Conven. SRI Conven. Nursery cost efficiency (Rs./kg grain) 0.21 0.66 0.21 0.62 Water use (m 3 ) 8,964 14,193 11,952 15,687 Water use efficiency (kg grain m -3 water) 0.81 0.34 0.63 0.33
  23. 23. Factor productivity for SRI and conventional rice cultivation, kharif and rabi , 2002- 04, Cauvery Delta, Tamil Nadu Input use/cost Aduthurai Thanjavur SRI Conven. SRI Conven. Fertilizer cost efficiency (Rs./kg grain) 0.64 1.01 0.62 0.93 Weeding cost efficiency (Rs./kg grain) 0.20 0.31 0.19 0.29
  24. 24. Targeted yield attributes for enhanced grain yield in SRI Yield attributes Role of M SRI 1. No. of panicles/m 2 2 . No. of grains/panicle 3. No. of spikelets/panicle <ul><li>Genotypic potential of rice plant tapped through: </li></ul><ul><li>Improved crop establishment </li></ul><ul><li>Soil stirring by cono-weeder </li></ul><ul><li>Intermittent irrigation </li></ul><ul><li>Synergistic effect of all </li></ul><ul><li>SRI components </li></ul>
  25. 25. Targeted yield attributes for enhanced grain yield in SRI Yield attributes Role of Modified SRI 3. Increased no. of spikelets/panicle Genotypic potential tapped through Improved grain filling which resulted in more grain weight than with traditional planting
  26. 26. Improved grain quality in SRI Cauvery Delta, Kharif, 2005 Treatments Grain length (mm) Grain width (mm) Kernel length (mm) Kernel width (mm) Conventional 8.79 2.38 6.39 1.99 SRI 8.85 2.41 6.51 1.98 C.D. (5%) 0.09 0.04 0.08 0.04
  27. 27. What to do? <ul><li>For farmer-friendly and faster adoption of SRI: </li></ul><ul><li>Strengthening of nursery & water management practices through community approach </li></ul><ul><li>Training of farmers and farm labourers in square planting </li></ul><ul><li>Mechanization of inter-cultivation </li></ul><ul><li>Increasing awareness on healthy nutrient management, especially for N management </li></ul>
  28. 28. Key is the healthy crop establishment
  29. 29. T h a n k y o u

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