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本文在对水稻品种资源丰产性的测定试验资料进行数理统计的基础上，研究了水稻增产幅度与气候变差、生育期变差的相互关系，得出了水稻引种的生态气候指标，即水稻原产地与引种地的气候变差小于５时，品种适应性较好，引种易成功；当生育期变差△ｎ小于７ｄ时，引进品种增产幅度随△ｎ增大而提高；大于７ｄ时，增产幅度随△ｎ增大而下降。
Based on the mathematical statistics of the test data of the rice varieties with high yield, the paper studied the relationship between yield increase rate and climate change and the variation of the growth period of rice yield, and obtained the ecological climate index of rice introduction, that is, When the climate change of the place of production and the introduced area is less than 5, the adaptability of the varieties is better and the introduction is easy. When the growth period is less than 7d, the increase rate of the introduced varieties increases with the increase of △ n; when it is larger than 7d, Amplitude decreases with increasing Δn.