Effect of Balanced Fertilization on Spring Maize Yield and Nutrient Absorption

The field plot experiment was carried out to explore the effect of balanced fertilization on maize yield, economic benefits, nutrient absorption and apparent soil nutrient balance in Jilin province. The results showed that, compared with farmers' practice treatment, maize yield was increased 2.3% to 3.1% by balanced fertilization treatment in the reduction of nitrogen 17%-37.7%, phosphate 39.2%-48.7%. The total amount of nutrient uptake and fertilizer use efficiency has increased by OPT treatment, in which nitrogen, phosphorus and potassium uptake increased 12.3-25.4 kg/ha, 0.8-2.9 kg/ha and 2.8-4.5 kg/ha respectively, fertilizer use efficiency increased13.7-19.6 percentage points. The result also showed, the nutrient balance coefficient of N, P and K were 0.92-1.11,0.83-0.96, 0.67-0.77, which were much more better than farmer' practices, so application rate of fertilizer with balanced fertilization was more reasonable and practices in maize production.