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《Chinese Journal of Rice Science》 2003-01
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Effects of SRI Technique on Physiological Characteristics and Population Development in Rice

WANG Shao hua, CAO Wei xing, JIANG Dong, DAI Ting bo, ZHU Yan(Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, P.R. China, Nanjing Agricultural University, Nanjing 210095, China)  
Rice physiological characteristics and population development under SRI (system of rice intensification) condition were studied by using japonica cultivar Wuxiangjing 9. Results showed that SRI significantly enhanced root activity, increased soluble sugar, non protein nitrogen, proline and malondialdehyde (MDA) contents in leaf, dry matter translocation percentage from vegetative organs to grains, and improved population quality remarkably. Rice yield, however, was limited by lower tiller number and panicle number of plant population. Under SRI condition, planting two seedlings per hill could increase tiller number of plant population, dry matter translocation percentage from vegetative organs to grains and improve population quality, which was in favor of yield increase. With increasing nitrogen rate,tiller number of plant population increased,whereas dry matter translocation percentage from vegetative organs to grains decreased, suggesting yield increase under SRI should not rely on the excess nitrogen rate.
【Fund】: 国家杰出青年科学基金资助项目(3972 50 2 1 );; 中荷国际合作资助项目
【CateGory Index】: S511
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