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Individual and combined effect of management components of SRI on the productivity of irrigated rice

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. SRI Modified SRI.

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Individual and combined effect of management components of SRI on the productivity of irrigated rice

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  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. SRI Modified SRI • Management practices tailored to the local conditions • Practiced in different names - countries/region • As “modified SRI” in Tamil Nadu Initiated from 2002 in Cauvery Delta, Tamil Nadu

  3. Practices recommended for SRI

  4. Objectives To study the individual effect of SRI components on rice productivity To study the synergistic effect of SRI practices To assess the factor productivity in SRI

  5. Experimental details Locations (2) : TRRI, Aduthurai, TN, India SWMRI, Thanjavur, TN, India Year : 2002 - 2004 Variety : ADT- R 45 (110 d ) Design : CRBD Replication : 3 Treatments : 13

  6. Treatment details YOSCI (SRI) YOSCF YOSHI YORHI YMSCI AOSCI AMRHI YMRHI AORHI AOSHI AMSCI AMSHI AMRHF (conventional) Y - Young seedling (15 d ) A - Aged seedling (25 d) O - One seedling/hill M - Multiple seedlings hill-1 S - Square planting (22.5 x 22.5cm) R - Row planting (15x10 cm) C - Cono weeding H - Hand weeding I - Intermittent irrigation F - Flooding

  7. Impact of inter-cultivation on yield, Cauvery Delta, Tamil Nadu, 2002-04 TRRI, Aduthurai Yield enhanced by 29% SWMRI, Thanjavur Yield enhanced by 46%

  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. Dominating Pests • -- Leaf folder

  10. Impact of SRI on pest incidence Ravi et al., 2006

  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. Components of chlorophyll as influenced by SRI practices, Kharif, 2005* * Mean data

  13. Root growth as influenced by SRI (inter-cultivation), Kharif, 2006* * On-going experiment

  14. Nutrient uptake (kg/ha), TRRI Farm, Cauvery Delta, Kharif,2005* *On-going research project

  15. Impact of older seedling age, Cauvery Delta, Tamil Nadu, 2002 -04 TRRI, Aduthurai Yield reduced by 23% SWMRI, Thanjavur Yield reduced by 18%

  16. Seedling age on rice productivity and profit, Cauvery Delta, Tamil Nadu, Rabi, 2002-03 * % yield increase over aged seedling Rajendran et al., 2005

  17. Influence of seedling age when planted, based on leaf number, Cauvery Delta, Kharif 2006 & Kharif 2007 (in progress)

  18. Panicle production

  19. Rice grain yield

  20. Impact of flooding, Cauvery Delta, Tamil Nadu 2002 -04 TRRI, Aduthurai Yield reduced by 17% SWMRI, Thanjavur Yield reduced by 16%

  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. Factor productivity for SRI and conventional rice cultivation, kharif and rabi, Cauvery Delta, Tamil Nadu, 2002-04

  23. Factor productivity for SRI and conventional rice cultivation, kharif and rabi, 2002- 04, Cauvery Delta, Tamil Nadu

  24. Targeted yield attributes for enhanced grain yield in SRI

  25. Targeted yield attributes for enhanced grain yield in SRI

  26. Improved grain quality in SRI Cauvery Delta, Kharif, 2005

  27. What to do? • For farmer-friendly and faster adoption of SRI: • Strengthening of nursery & water management practices through community approach • Training of farmers and farm labourers in square planting • Mechanizationof inter-cultivation • Increasing awareness on healthy nutrient management, especially for N management

  28. Key is the healthy crop establishment

  29. T h a n k y o u

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