江西省双季水稻生长季气候适宜度评价分析

通过对江西省双季水稻生长季温、光、水的需求及当地气候条件进行分析,建立了双季水稻各生育期光、温、水及气候适宜度评价模型,确定了双季水稻各生育期多年平均日照百分率达50％时的日照时数为适宜的光照状态,根据模型分别计算了1961-2010年江西省早稻和晚稻生长季各气候因子的适宜度.结果表明,双季晚稻的温、光、水及气候适宜度明显高于早稻,双季水稻各生育期以光照适宜度最大,温度次之,降水最小；降水是影响双季水稻生产的重要因素,尤其对晚稻的影响更为显著；温度是双季水稻生长发育的关键气候因子,早稻苗期和分蘖-孕穗期低温,早稻乳熟期高温以及晚稻抽穗扬花期低温是双季水稻温度适宜度偏低的主要原因.

Evaluation on Climatic Suitability during Growth Season of Double Rice in Jiangxi Province

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 for late rice h seedling stage and tillering to booting stage, high temperature for early rice milk stage, low temperature eading and flowering stage.