Presented by: Ma Guohui, Deputy DG China National Hybrid Rice R & D Center
Presented at: Workshop on the System of Rice Intensification, Exchanging Experience in China, the Democratic People’s Republic of Korea and Internationally
Held February 28-March 2, 2010, in Hangzhou, China
4. 1. Key elements of SRI & M-SRI 2. Major progress in M-SRI 3. Key issues for SRI improvement Outline
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8. Yield differences between varieties by SRI and Ck Yield advantages by M-SRI : 3.6-10.5% over CK Varieties applied: longer growth duration, vigorous tillering, bigger panicles, and resistant to lodging
9. 1 ) SRI used with 7 new hybrids showed yield increase, producing yields of more than 800 kg/mu (12 t/ha) 2 ) Spacing: 26- 30×30cm ; 3 ) Showed yield differences with M-SRI between varieties Yield differences between varieties with SRI 图 1. SRI 改良技术平均产量效果比较 图 2. SRI 改良技术最高产量效果比较
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11. Yield components difference in different nurseries Treatment in nursery Yield ( t/ha ) Panicles/ 667m 2 Spikelets per panicle Filled grains per panicle Grain weight ( g ) Upland tray nursery 11.13 17.38 191.5 172.3 24.78 Upland nursery 10.31 14.52 212.8 186.9 25.33 Wet tray nursery 9.86 13.93 203.1 183 25.8 Wet Nursery 9.74 15.1 199.9 167.8 25.61
12. 3) Reasonable (optimal) spacing and suitable seedling age 提出了“适龄早栽、合理稀植”改良型强化栽培群体调控技术 Transplanting age for high yield : Leaf age = 2-5 leaves Spacing : 水稻强化栽培要重视稀植,但必须 是合理稀植 . Hunan : 8000 ~ 10000 Pl/667m2 Sichuan : 6000 ~ 9000 Pl//667m2 Guangdong: 8000 ~ 10000 Pl//667m2
16. Establish nitrogen-saving technique for high- yielding rice cultivation Progress: With nitrogen-saving technique, a super high-yield of 12t/ha more, but with a lower amount of N at 231.0-255.0 kg/ha Varieties Highest yield ( t/ha ) Purity of N applied ( kg/ha ) Xieyou 9019 8.90 300.0 Liangyou 293 12.14 231.0 Liangyoupeijiu 12.26 255.0
18. 同等施肥水平强化栽培产量明显提高,同时氮素利用率均较对照高,提高幅度 5.7 - 25.9% . 说明强化栽培在不增加氮素用量或者适当降低的情况下,也能获得高产 . Nitrogen-saving effects with yields Cultivation method N ( kg ) Yield (kg/667m2) N rate (%) M-SRI over CK (+/-%) M-SRI 12.0 653.7 54.3 5.7 10.8 (less N by 10% ) 648.1 59.08 15.0 9.6 (less N by 20%) 621.0 64.69 25.9 CK 12.0 616.6 51.38 -
27. The difference of the dry matter accumulation and Harvest Index with varied cultivation methods 不同栽培方式对物质积累及经济系数的影响 齐穗期 Heading (kg/mu) 成熟期 Harvest (kg/mu) 茎输出率 Output of stem (%) 经济系数 HI CK 908.2 1165 16.2 0.535 SRI 804.7 1102 23.3 0.547 M-SRI 898.4 1214 24.4 0.560 宽窄 820.5 1207 25.0 0.555
28. Difference of panicle rates with varied cultivation methods 不同栽培方式对成穗率的影响 初步结论:不同栽培方式比较中,改良型强化栽培技术成穗能力较强, SRI 技术最低 . SRI
38. Transplanting Direct seeding Seedling broadcasting No-tillage cultivation 3. Key issues for SRI improvement SRI should be more diversified to deal with the great diversity of rice cultivation conditions
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41. Happy Festival of Lanterns! 元宵节快乐! For any information, please contact: maguohui@hhrrc.ac.cn