ABSTRACT
OBJECTIVE: To explore a normalized fertilization technique for the Perilla frutescens (L) Britt in Chongqing. METHODS: The quantities of N, P and K were studied to get the best ratio of fertilization by quadratic regression orthogonal rotational combing design with three factors. RESULTS: The ranking of the effects of N, P, and K on the yield of Perilla was K > P > N. High quantity of K could improve the effect of N on the yield of Perilla, while in the condition of low quantity of K, high quantity of N tended to restrain the yield of Perilla. The best fertilization ratio was CO(NH2)2 13.74-18.58 kg · (667 m2)-1, P2O5 6.40-7.96 kg · (667 m2)-1, and K2O 2.81-3.80 kg · (667 m2)-1. CONCLUSION: Rational ratio of fertilizers would increase the production of Perilla. This study provides the theoretical basis for standard cultivation of Perilla.