Absorption and distribution of nitrogen, phosphorus and potassium in taro

The uptake of N, P, K by taro plantColocasia esculenta (L.) schott was lower at seedling stage, but increased rapidly at leaf vigorous growth stage, and began to decrease at later corm vigorous growth stage. Totally, the uptake of K2O was the highest, followed by N, and lowest was P2O5. In the whole life cycle, the ratio of N, P2O5, K2O was 1∶0.28∶1.1. Nitrogen mainly distributed in leaves, then distributed to the first grade taro and second grade taro at the seedling stage. Phosphorus and potassium mainly distributed in petiole at seedling stage, then phosphorus mainly distributed to first grade taro, while potassium mainly distributed to second grade taro.