It was found that potassium uptake in seedling stage for late rice was higher than for early rice, the former occupied 7.5% of total K uptake, the latter only occupied 0.3%, the same situation was observed at maximum tillering stage.

• 已发现苗期晚稻吸钾量高于早稻，晚稻占吸钾总量的7.；5%25，早稻仅占0