大豆低温冷害敏感时期试验研究报告

PRIMARY STUDY ON THE KEY TIME FOR SOYBEAN PLANTS TO BE INJURED BY THE LOWER TEMPERATURE

摘要:

本试验以人工气候箱控制温度的方法,对不同生育时期的大豆(品种吉林3号)给予10℃低温(昼夜恒温,光照14小时)处理10天,研究低温对大豆生长,发育,产量等的影响。结果发现6月11—20日和6月21—30日即分枝至开花以前(花芽分化时期)对低温处理最敏感,该阶段遇低温产量最低,减产60.1—60.8%,是大豆冷害的关键期。

Abstract:

The effect of the low temperature on the growth and yield of Soybean was studied with CV.Jilin No.3 plants of different development period which had been treatmented at 10 ℃ and in light 14 h./day within ten days in a climatron.the result showed that the period of flower bud differenliation (from branching to flowering) was the most sensitive to the lower temperature.If Soybean plants were exposured to lower temperature in this time, the yield would be reduced by 60.1—60.8%.