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1 协调环境因素的综合作用,使种子生产向有利于高活力种子的方向转化1.1 选择适宜的制种区域。棉花是喜温作物,充足的热量有利于棉花的生长发育,同时许多研究者也指出,棉铃发育过程中的温度对棉籽的质量影响最大。即棉铃发育过程中的气温高,则以后吐絮的棉籽其籽指较大,成熟度较高;而棉铃发育过程中的气温低,则籽指较小,成熟度下降。另据李大庆等(1979～1980)对江苏省陆地棉伏桃和晚秋桃的棉籽进行比较,其发芽率伏桃较晚秋桃高17.65%;棉籽百粒体积及种子
1 Coordination of the combined effects of environmental factors, the seed production is conducive to the direction of high-vigor seeds 1.1 Select the appropriate seed production area. Cotton is a thermophilic crop, sufficient heat is conducive to the growth and development of cotton, while many researchers also pointed out that the temperature during boll development has the greatest impact on the quality of cottonseed. That is, during the development of cotton boll, the temperature is high, then the seed of cotton boll is bigger and the maturity is higher; while the temperature of boll development is low, the seed index is smaller and the maturity is decreased. According to Li Daqing et al. (1979-1980), the cottonseed of Ficus vinifera and the late-autumn peach of Jiangsu province were compared, the germination rate was 17.65%