Effects of different fertilizer enhancers on the growth and development of pepper and rhizosphere soil nutrient in high altitude region

LI Mengyao; YI Limei; YANG Liu; WU Jinping; GUO Fengling

doi:10.16861/j.cnki.zggc.2025.0159

Abstract：In view of the low fertilizer utilization rate of off-season pepper production in high-altitude cold regions of China,screening suitable enhancers for pepper in high-altitude areas is of great significance for increasing yield and fertilizer efficiency.Seven enhancer treatments,including 25％polyglutamic acid and polyglutamic acid leopard root powder,were set up,with clear water as the control.Single-factor randomized block design was adopted for the experiment.The results showed that EM bacterial liquid treatment significantly promoted the plant height of pepper,increasing by 14.04％com-pared with the control,and had the best yield-increasing effect,the yield was 3 255.73 kg·667 m-2,an increase of 35.74％.The treatment with plant enzyme organic fertilizer had the highest soluble sugar content in pepper,reaching 0.425％.The treatment with polyglutamic acid leopard root powder had the highest soluble protein and dry matter content in pepper,which were 5.34 mg·g-1 and 8.77％,respectively.The 25％polyglutamic acid treatment significantly increased the avail-able nitrogen,available potassium and organic matter content in the rhizosphere soil of pepper,which were 87.03 mg·kg-1,152.37 mg.kg-1 and 4.35％,respectively,increasing by 11.68％,23.40％and 1.28 percent points compared with the con-trol.In conclusion,different enhancers have significant differences in their effects on the agronomic traits,yield,quality and nutrient content of rhizosphere soil of pepper.The research results provide a basis for the scientific selection of enhancers in pepper cultivation at high-altitude areas.