Objective The effects of chemical fertilizer reduction combined with different fulvic acid potassium on the growth and yield of peanut were studied.

Method The effects of different treatments on the growth and yield of peanut were studied by simulating field planting in pots, with no fertilizer as the control, 100% chemical fertilizer combined with 100% fulvic acid potassium as the control, 100% chemical fertilizer combined with 0% fulvic acid potassium, 75% chemical fertilizer combined with 25% fulvic acid potassium, 50% chemical fertilizer combined with 50% fulvic acid potassium, 25% chemical fertilizer combined with 75% fulvic acid potassium and 100% fulvic acid potassium as the treatments.

Results Compared with no fertilizer and pure chemical fertilizer, each treatment had a certain effect on the growth and development of peanut plants. Among them, 25% chemical fertilizer combined with 75% biochemical fulvic acid potassium (ST4) and 50% chemical fertilizer combined with 50% mineral source fulvic acid potassium (KT3) had the greatest effect on the growth and development of plants, and the effect of chemical fertilizer reduction combined with biochemical fulvic acid potassium on the agronomic traits of peanut was better than that of mineral source fulvic acid potassium. The results of peanut yield and its components showed that ST4 and KT3 had the greatest influence on peanut yield and its components in the combined application of biochemical and mineral fulvic acid potassium organic fertilizer, and the peanut quality of ST4 treatment was higher than that of KT3.

Conclusion From the analysis of peanut growth and yield and composition factors, 25% chemical fertilizer combined with 75% biochemical fulvic acid potassium and 50% chemical fertilizer combined with 50% mineral source fulvic acid potassium were the best recommended schemes for this study.