Abstract: A 3414 test of N, P and K for yam was carried out, the results showed that under the conditions of this experiment, there were remarkable regression relationship between yield and NPK fertilizer application, the amounts of N, P₂O₅, K₂O application were 15.8 kg, 6 kg and 18.8 kg per 667 m² respectively, the yam production could gain the best economic benefit, the yield was 1515.7 kg.