Presenter: Lin Xianqing, CNRRI Workshop on the System of Rice Intensification, Exchanging Experience in China, the Democratic People's Republic of Korea and Internationally, organized and hosted by the China National Rice Research Institute (CNRRI), with support from The Asia Foundation. Hangzhou, China, February 28-March 2, 2010

1. Workshop on SRI rice technology Evaluation of Key Factors of SRI Method Dr. Lin Xianqing E-mail： xqlin2003@163.com China National Rice Research Institute

2. Reporting Content： Ⅰ. Seedlings Ⅱ. Spacing Ⅲ. Organic fertilizer Ⅳ. Water management Ⅴ. Comparison between SRI and traditional method Ⅵ. Operation of SRI

3. 1. Seedlings

4. 1. Tillering

5. 2. Yield (Site:Xiage town)

6. Yield (Site:Baite town)

7. Ⅱ. Spacing

8. 1. Tillering A: 195,000 hills/ha C: 135,000 hills/ha E : 75,000 hills/ha

9. 2.Yield (Xianju)

10. 2.Yield (CNRRI) – 2 seasons

11. Ⅲ.Organic fertilizer

12. Effect of organic fertilizer on grain yield D1: 7.5 hills/m2; D2: 13.5 hills/m2; D3 :19.5 hills/m2; CK: 19.5 hills/m2

13. Ⅳ. Water management

14. Quantitative measurement of water management

16. SWD: Shallow water depth with wetting and drying

17. Comparison of water input and output under different irrigation methods.

18. Changes in redox potential of SWD at different growth stages ( A----SWD)

19. The number of actinomycetes under different fertilizer and water management regimes I1 =SWD; I2 = CKF1 = Chemical fertilizer F2 = 50% organic, 50% chemical fertilizer F3 = All organic fertilizer

20. Physiological characteristics of rice leaves at flowering stage as influenced by manure and density D1: 7.5 hills/m2; D2: 13.5hills/m2; D3 : 19.5hills/m2

21. Nitrogen accumulated before flowering stage and during the grain-filling period (GFP); N remobilized from vegetative tissue; leaf and grain N content; total N accumulated at maturity; and N harvest index (NHI) of 2 irrigation methods in 2 rice cultivars (Liangyoupeijiu and Eryou 7954)

22. Effect of SWD on tiller composition and productive panicles

23. Effect of SWD on flag leaf traits（IIyou7954）

24. Effect of SWD on canopy light transmittance rate at flowering stage (A = SWD; T = CK)

25. Effect of SWD on the incidence of sheath blight

26. Effect of SWD on bleeding sap of rice root ( A = SWD; T = CK)

27. V.Comparison between SRI and traditional method

28. Physiological characteristics of rice leaves as influenced by SRI * Means followed by different letters are significantly different at the P = 0.05 level according to Duncan’s Multiple Range Test.

29. a c b b Effect of transplanting density on leaf nitrogen content under SRI CK = 25 hills/m2; D1 = 7.5 hills/m2D2 = 13.5 hills/m2D3 = 19.5 hills/m2

30. Various tiller components with SRI

31. CK SRI Root growth of SRI at stem elongation

32. Demonstration yields of SRI （2003-2005）

33. Ⅵ. Operations of SRI

34. A. Precision seeding with seedlings by tray

35. B. Density control Transplanting density: 13.5-19.5 x 104 hill/ha

36. C. Standard of field water control is SWD

37. “SWD” = Three Shallows – transplanting, when spraying with insecticide, and during booting-floweringstage Three Wets - tillering, panicle initiation, and during milk grain-mature grainstage One Dry - tiller control

38. Wet tillage Shallow-water puddling

39. Shallow-water transplanting Dry for tiller control Wet tillering

40. Shallow-water for booting to flowering Wet for mature grain Wet for milk grain

41. D. Maintaining N and increasing K

42. Need to increase organic fertilizer

43. E . Integrated Pest Management (IPM)

44. Demonstration of SRI in Bu Tou Village

45. Technical Guidance

47. Thank you