Presenter: Zhu Defeng
Slides from a powerpoint presentationmade to a workshop on SRI, held at theWorld Rice Research Conference,Tsukuba, Japan, November 7, 2004
Audience: World Rice Research Conference, Japan
Subject Country: China
9. Percentage of planting area of different types of rice and average planting area for types of variety Type Percentage of planting area (%) Indica inbred 17.3 Japonica inbred 27.6 Two-line hybrid 5.4 Three-line hybrid 49.8
13. Costs of rice production Items Percentage(%) Labour 45.9 Fertilizers 17.9 Pesticides 4.9 Machine/animal power 5.8 Irrigation /drainage 12.9
14. Nitrogen 180kg/ha ave. -- only 25-30% efficiency Pesticide 5-6 times of application for E/L rice 6-8 times of application for single rice Water Irrigation of 8000-1200M 3 /ha Low resource-use efficiency
15. ~ 120M farms are planting rice at present Average area per farm -- 0.2-0.4 ha Small-scale of production
17. Changes in main traits of dominant varieties Period 60s -80s After 90s Plant height (cm) 80-100 100-125 Tillering capacity Medium Strong Panicle size Medium Large
18. Changes of cultivation practice S: shallow water layer, M: moisture, D: dry Period 50s-60s 70s-80s 90s After 90s Plant density Sparse Dense Sparse More sparse Irrigation Deep Deep-Shallow S-M-D S-M-D
19. 4. Basic Principles and Opportunity of SRI in China
20. Basic principles of SRI and functions Basic principle Function Younger seedling Tiller growth Sparse planting Tiller growth, large panicle S-M-D irrigation Water saving, root growth, and fertilizer use efficiency Organic/chemical fertilizer Soil fertility
21. Contributions of SRI Practice Contribution Sparse planting with younger seedling Labor-saving S-M-D irrigation Water-saving Organic/chemical fertilizer Sustainable soil fertility
32. Comparison of water consumption in SRI and check Treatment Water consumption (m3/ha) Rate of saved water (%) CK 6289.8 0.0 S1 4879.9 22.4 S2 3806.7 39.5 S3 3477.0 44.7