| Abstract: In order to explore the application effect of potassium fertilizer on reduction and increase efficiency of pepper, five fertilization treatments were set: conventional fertilization (CK), 80% conventional fertilization (T1), 80% conventional fertilization + high potassium water-soluble fertilizer (T2), 60% conventional fertilization (T3), 60% conventional fertilization + high potassium water-soluble fertilizer (T4), the effects of different fertilization methods on phenological period, morphological characteristics, flower or fruit characteristics and yield of pepper in greenhouse was studied. The results show that compared with the local conventional fertilization, T2 treatment which on the basis of reducing base fertilizer by 20% under conventional fertilization, the targeted application of high potassium water-soluble fertilizer at flowering and fruiting stages could prolong the harvest period for 14 days, increase the numbers of fruit per plant by 2.6, and effectively increase the yields of 9 579.0 kg/hm2 by 41.0% and increase profits of 38 316 yuan/hm2 . This fertilization method could be used as reference for feitilizer reduction and increasing efficiency of pepper planting. |