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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (4): 1007-1019.doi: 10.16420/j.issn.0513-353x.2023-1022

• Cultivation·Physiology & Biochemistry • Previous Articles     Next Articles

Effects of Reducing Chemical Fertilizer Combined with Organic Fertilizer on Potato Yield and Nutrient Utilization

LIN Xi1,DENG Zhenpeng1,YANG Xinyue1,ZHOU Keyou2,YI Xiaoping1,and WANG Jichun1,*(wjchun@swu.edu.cn)   

  1. 1Chongqing Key Laboratory of Potato Biology and Genetic Breeding,College of Agriculture and Biotechnology,Southwest University,Chongqing 400715,China 2Wuxi County Planting Industry Development Service Center,Chongqing 405800,China
  • Received:2024-11-19 Revised:2025-01-17 Online:2025-04-25 Published:2025-04-25
  • Contact: WANG Jichun

Abstract: In 2020 and 2021,a randomized block trial design was adopted,in which no fertilization control(CK),high-volume chemical fertilizer(T1),medium-volume chemical fertilizer + organic fertilizer(T2),medium-volume chemical fertilizer(conventional fertilization by local farmers,T3),low-volume chemical fertilizer + organic fertilizer(T4),low-volume chemical fertilizer(T5)and low-volume chemical fertilizer(T5)were adopted. Studied the changes and differences in potato yield,quality and nitrogen,phosphorus and potassium utilization efficiency. The results showed that the treatment of reducing chemical fertilizer combined with organic fertilizer could significantly improved the utilization efficiency of nitrogen,phosphorus and potassium nutrients in potato tubers,and significantly improved the soil organic matter content and the yield contribution rate of fertilizers,among which T2 treatment was the best. Declining chemical fertilizer will reduce the rate of commercial potato and the number of tubers per plant,which will affect the potato yield. However,organic fertilizer instead of moderate chemical fertilizer can alleviate the negative impact of declining chemical fertilizer on the yield,increase the rate of commercial potato and the number of tubers per plant,and increase the tuber yield. The highest yield of T2 was 18 810.35 kg · hm-2. At the same time,the content of dry matter,starch,vitamin C and starch will also decrease with the decrease of chemical fertilizer,and the replacement of organic fertilizer can improve the quality decline. The treatment of chemical fertilizer combined with organic fertilizer can increase the content of dry matter,starch,vitamin C and soluble proteins of tuber more than that of single chemical fertilizer treatment,and the quality of T2 was the best. To sum up,the application of organic fertilizer can promote the utilization of nutrients,improve the yield and quality of potatoes.To sum up,the application of organic fertilizer promotes the utilization of nutrients,thus improving the yield and quality of potatoes. Under the same ecological conditions,the application of 750 kg compound fertilizer combined with 3 375 kg commercial organic fertilizer per hectare is more conducive to achieving high yield,high quality and high fertilizer utilization rate.

Key words: potato, fertilizer application rate, organic fertilizer substitution, yield, quality, nutrient utilization

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