我国是稻作最早的国家之一,栽培区域广达35个纬度,约有四万个各感光类型品种、这为我们研究光照农业气象问题提供了丰富的资料.近十多年来一些同志对此问题作了一些探索.在文献中我们曾提出暗长积量概念:“水稻光照阶段内的每日暗长之和称暗长积量,水稻只有满足该品种所需要的暗长积量时,才能完成光照阶段”.并且建立模式 China is one of the earliest rice growing countries with 35 latitudes and about 40,000 varieties of cultivars in cultivated areas, which provide abundant information for us to study the problem of light agricultural weather.For the past decade or so some comrades In this paper, we have proposed the concept of dark long products: “the sum of the dark long days in the light stage of rice is called the dark long products, and the rice only satisfies the dark long products required by the variety In order to complete the lighting stage. ”And to establish the model