1. Development of SRI for Rice Production in China Slides from a powerpoint presentation made to a workshop on SRI, held at the World Rice Research Conference, Tsukuba, Japan, November 7, 2004

• Dr. Zhu Defeng

China National Rice Research Institute

Hangzhou, PRC

2. Basic principles of SRI and functions Water saving, root growth, and fertilizer use efficiency Irrigation management Soil fertility Organic/chemical fertilizer Tiller growth, large panicle Sparse planting Tiller growth Younger seedlingsFunction Basic principle 3. Contributions of SRI Sustainable soil fertility Organic/chemical fertilizer Water saving Irrigation management Labor saving Sparse planting with younger seedlingsContribution Practice 4. Comparison of yield in SRI and check (Jiayou 99 variety), 2003 9.3 11.1 Yield(t/hm 2 ) 100.0 25.1 92.6 191 209.6 CK 119.4 25.3 91.2 222.8 215.7 SRI Relative yield(%) Grain weight (g /1000) Fertility(%) Grains(No./ panicle Panicle (No./m 2 ) TR 5. 6. Analysis of factors of yield increasein SRI compared with check 100.0 1.73 Total 4.3 0.07 Grain weight 80.1 1.38 Grain no. 15.7 0.27 Panicle no. Contribution (%) Yield (t/hm 2 ) Item 7. Pattern of tiller growth in SRI and check 8. Light penetration 9. Experiment of water saving at CNRRI 10. Comparison of water consumption in SRI and check 39.5 3806.7 S2 44.7 3477.0 S3 22.4 4879.9 S1 0.0 6289.8 CK Rate of saved water (%) Water consumption (m3/ha) Treatment 11. Transplanting in shallow water layer 12. 33 DAS 13. 14. 15. Heavy panicles 16. Normal 3-S (SRI) 17. Sparse sowing Check 18. Wide row planting 19. Moist soil 20. 21. Conclusions

Rice management technology that matches new varieties/hybrids is needed to further increase yield

SRI principles match the current trends inthe advance of rice cultivation technology

Site-specific SRI technology is needed to for raising the yields of Super-Rice and for greater water productivity

22. THANKYOU