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在水分等条件适宜的情况下,对温度对于黑稃苏丹草种子发芽和出苗影响的研究表明,苏丹草种子发芽所需的最低温度为8～10℃,最适温度为20～30℃,最高温度为40℃。播种后出苗天数与该期间的日平均温度呈指数曲线关系(y=40.6×0.90~x),当该期>8℃的有效积温达67℃以上时才能出苗。
In the condition of suitable moisture and other conditions, the study on the effect of temperature on the germination and emergence of sudangrass seed showed that the minimum temperature required for germination of sudangrass seed was 8 ~ 10 ℃ and the optimum temperature was 20 ~ 30 ℃, the highest The temperature is 40 ° C. The number of emergence days after seeding showed an exponential curve with the daily mean temperature (y = 40.6 × 0.90 ~ x). When the effective accumulated temperature> 8 ℃ reached above 67 ℃, the seedlings could emerge.