Optimization Study on Nitrogen, Phosphorus, and Potassium Fertilizer Efficiency for Corn Based on the '3414' Field Experiment in Yidu City
Abstract：This study used the '3414' field experimental design to fit the relationship between fertilizer application rates and yield using a ternary quadratic fertilizer effect model, systematically analyzing the effects of nitrogen (N), phosphorus (P2O5), and potassium (K2O) fertilizer rates on corn yield and its components. The results showed that treatment 6 (N2P2K2) had the highest actual yield (592.1 kg/667m2), which was 50.9% higher than treatment 1 (N0P0K0) without fertilizer. The model predicted the maximum fertilizer rate as N=10.34 kg/667m2, P2O5=5.25 kg/667m2, K2O=6.1 kg/667m2, corresponding to a yield of 588.95 kg/667m2; the optimal fertilizer rate was N=9.05 kg/667m2, P2O5=4.61 kg/667m2, K2O=5.62 kg/667m2, corresponding to a yield of 586.8 kg/667m2. Combined with benefit analysis, it is recommended that corn production in Yidu City adopt a fertilizer scheme of N=9-10.4 kg/667m2, P2O5=4.6-5.3 kg/667m2, and K2O=5.6-6.1 kg/667m2. This study provides a scientific basis for scientific fertilization in the region.
Keywords：Spring corn3414 experimentTernary quadratic modelFertilizer efficiency optimizationMarginal benefit
Publication Date：2025-12-15
Online Publishing Date：2026-01-16(First online date of this platform, not the publication date of the document)
Pages：4( 50-52,55 )