关键词: 双季水稻, 气候适宜度, 评价

Abstract: The suitability evaluation model was established by analyzing the demand of temperature,light,water for growth and development of double rice and local climatic conditions.And the appropriate light condition was determined as 50% annual average sunshine hours in the sunshine percentage.Climatic factors suitability of double rice growing season in Jiangxi province during 1961-2010 was calculated by using the model.The results showed that the suitability of temperature,light,water and climate for late rice was higher than that of early rice.Light suitability during double rice growth season was best,following by temperature and precipitation.Precipitation was an important factor affecting double rice production,especially for late rice.Temperature was a key climatic factor affecting double rice growth and development.It was the main reason for low temperature suitability for double rice that low temperature for early rice seedling stage and tillering to booting stage,high temperature for early rice milk stage,low temperature for late rice heading and flowering stage.

Key words: Double rice, Climatic suitability, Evaluation