关键词: 超级杂交稻, 产量稳定性, 干物质生产, 肥料用量

Abstract: [Objective] The yield performance, the growth characteristics and the ecological adaptability of super hybrid rice were ascertained under different fertilizer application conditions in different tested sites. [Method] Field experiments with three fertilizer rate treatments (135, 180, 225 kg N/hm2) and two combinations (Zhunliangyou-527 and Liangyou-293) were conducted in ChangSha, GuiDong, HengYang, NanXian and YongZhou of Hunan province in 2004 and 2005. [Results] The significant differences of the dry matter accumulation, the harvest yield and its components were founded among the five tested sites and between two years, but no significant differences were founded among three fertilizer rate treatments. The yield components of super hybrid rice performed multifarious properties, of which the harvest yield showed the significantly positive correlations with the productive panicles, the grain filling percentage and 1000 grains weight, and the significantly negative correlation with grain number per panicle and no correlation with spikelet number per unit area. [Conclusion] The harvest yield of super hybrid rice was mainly influenced by the temperature and sunshine conditions of the tested sites and years. The fertilizer rate in the range from 135 kg N/hm2 to 225 kg N/hm2 was not the factor of harvest yield limited. And to increase panicle number was the possible path to increase harvest yield.

Key words: Super hybrid rice, Yield, Dry matter production, Fertilizer rate