Abstract: A test on fertilizer efficacy of Xianjing areca taro was carried out by using the "3414" full implementation plan, the results showed that under the experimental condition of soil fertility, potassium had greatest impact on taro yield, more obvious yield-increasing effect in the treatment of applying potassium sulfate than applying potassium chloride was observed. And Xianjing areca taro had the highest yield while applying amount of N, P₂O₅ and K₂O was 33.6 kg/667 m²(168 kg/hm²),11.4 kg/667 m² (171 kg/hm²)and 47 kg/667 m²(705 kg/hm²) respectively.