Effect of K-fertilizer from Long-term Experiments of Fertilizers Applied in Fluvo-aquic Soil

The twenty years experiments of fertilizers applied in fluvo-aquic soil was conducted to de-termine the effect of fertilizer on the soil nutrients,crop yield and quality.The results showed that K fertilizer could increase yield and content of protein and amino acid of wheat,improve content of soil nutrients.If K fertilizer was not applied,the soil express K lack and output would be decreased.