当我们在进行种子发芽试验时,会发现有些种子尽管有其发芽所需的环境条件,即适宜的温度、充足的水分、足够的氧气,但经历了较长时间,种子仍旧纹丝不动,种皮一点也没变软,水分完全没被吸收,和没有发芽的干种子一模一样,一直处于不萌发状态中。种子生理学上把这种状态下的种子称为“硬实”。这类种子在外形上,丝毫看不出和其他能萌发的 When we were conducting seed germination tests, we found that although some seeds had the necessary environmental conditions for their germination, that is, suitable temperature, adequate moisture and enough oxygen, the seed still remained undisturbed after a long period of time, Nor softened, the water was not absorbed at all, and the germinated dry seeds were exactly the same, always in a non-germinated state. Seeds physiologically call this state “hard”. Such seeds in appearance, the slightest can not see and other germination