Abstract: Taking 6-year-old jujube（Zizyphus jujuba）as test material, the effects of different fertilization amount on photosynthesis, yield and quality of Junzhi jujube were studied under drip irrigation condition, the correlation between nitrogen, phosphorus and potassium elements and yield was studied, each fertilization treatment was comprehensively evaluated by the membership function method.The results show that potassium fertilizer is the most beneficial to the photosynthetic potential of jujube leaves, follow by nitrogen fertilizer and phosphate fertilizer, and it is more beneficial to the effect of potash fertilizer when nitrogen fertilizer is sufficient; It can increase yield, fruit vertical and horizontal diameter, fruit weight and commodity fruit rate when nitrogen and potassium fertilizers are sufficient, phosphorus fertilizer is appropriate; The best fertilization formula of N、P₂O₅、K₂O of Junzhi jujube with drip irrigation in Nanjiang is 1∶0.66∶0.83.

Key words: Key works： Junzhi jujube（Zizyphus jujuba）, fertilization, photosynthesis, yield, quality