Abstract:

It is of active significance to analyze the climatic and ecological characteristics of crop growth rate (CGR) for two-line hybrid rice variety Liangyoupeijiu, so as to optimally plan its planting areas. Based on a serious experiment, a model was established by using seven indices of climatic factors. According to the meteorological data of 1980-2002, CGR of 109 cites (including seasons) were concluded, and the average changing values were ranged 13.83~23.44 g/d·m2 for seven rice planting areas in China. The CGR of early and late rice showed lower in Southern China, and that of one season middle rice showed higher in the Yangtze River valley. High CGR (18～22 g/d·m2) was distributed in the areas of Huang-Huai valley, Sichuan Basin and Yunnan-Guizhou Tableland. Considering the demands from growing season and CGR superiority, the optimum planting areas for Liangyoupeijiu were at the middle and lower valley of the Yangtze River, and the southern region of Huang-Huai valley.

Key words: two line hybrid rice, crop growth rate, climate, model

摘要：

分析两系杂交稻品种两优培九生长速率(CGR)的气候生态特性,对于优化规划种植区域具有积极意义。通过建立大田生长期（返青-成熟）相应于7个气象参数的CGR模型,并依据1980-2002年的气候资料,计算了109个地区（包括季节）的两优培九CGR,按7个水稻种植生态条件类型归纳,平均值变化在13.83～23.44 g/d·m2。华南地区早、晚稻CGR较低,长江中下游流域一季中稻较高,黄淮稻区、四川盆地稻区和云贵高原单季稻区的CGR高达18～22 g/d·m2。综合考虑生长季节的要求和CGR的优势,两优培九的最优化种植区域宜在长江中下游流域和黄淮流域偏南地区。

关键词: 两系杂交稻;作物生长率;气象;模型