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一、前言 秋季低温冷害是水稻生产上主要的农业气象灾害,它对水稻的稳产高产影响很大。国内外许多农业和气象工作者对冷害的生理机制、指标变化和防御措施等已做过大量研究工作。但不少的研究表明:品种和栽培条件的差异,不同地区或同一地区不同气候背景的年份,水稻对低温的抗逆性都可能存在差异。因此,1979～80年,我们参加了全国杂交稻气象科研协作“冷害指标及地理变化规律的研究”,除完成协作组规定的汕优6
I. Introduction Chilling injury in autumn is the major agricultural meteorological disaster on rice production. It has a great impact on the stable and high yield of rice. Many agricultural and meteorological workers at home and abroad have done a great deal of research work on the physiological mechanisms of chilling injury, changes in indicators and defensive measures. However, many researches show that there may be differences in the resistance of rice to low temperature in different years or years with different climate backgrounds in different regions or regions. Therefore, from 1979 to 1980, we participated in the research on the co-operation of the National Hybrid Rice Meteorological Scientific Research on the “Chilling Damage Index and the Geographical Change Law”. In addition to the completion of the cooperative group specified Shanyou 6