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

Dr. Zhu Defeng

China National Rice Research Institute

Hangzhou, PRC

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 seedlings Function Basic principle

Contributions of SRI Sustainable soil fertility Organic/chemical fertilizer Water saving Irrigation management Labor saving Sparse planting with younger seedlings Contribution Practice

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

Analysis of factors of yield increase in 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

Pattern of tiller growth in SRI and check

Light penetration

Experiment of water saving at CNRRI

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

Transplanting in shallow water layer

33 DAS

Heavy panicles

Normal 3-S (SRI)

Sparse sowing Check

Wide row planting

Moist soil

Conclusions Rice management technology that matches new varieties/hybrids is needed to further increase yield SRI principles match the current trends in the advance of rice cultivation technology Site-specific SRI technology is needed to for raising the yields of Super-Rice and for greater water productivity

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

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

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

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