Effects of nitrogen and potassium fertilizer reduction on soil physicochemical properties and potato yield in sandy farmland

doi:10.14088/j.cnki.issn0439-8114.2025.04.012

Abstract

Abstract: The purpose of this study was to explore the suitable fertilizer reduction strategy for green and high-yield cultivation of potato（Solanum tuberosum L.） in Yulin sandy area. The potato V7 variety was used as test material. Conventional full fertilization was used as control (CK, N100%, P100%, K100%), and its total nitrogen fertilizer (N), phosphate fertilizer (P₂O₅) and potassium fertilizer (K₂O) were applied 300.0 kg/hm², 390.0 kg/hm² and 120.0 kg/hm² respectively. Four fertilizer reduction treatments were established, including F1 (N95%, P100%, K100%), F2 (N90%, P100%, K100%), F3 (N100%, P100%, K95%) and F4 (N100%, P100%, K90%). The effects of different fertilizer reduction treatments on soil physicochemical properties in 0~20 cm soil layer, potato yield and commodity potato rate were analyzed. The results showed that in the early stage of potato growth, the topsoil water content of F2 treatment was significantly higher than that of F3, F4 and CK treatments by 11.66%~26.82 (P<0.05), and the soil temperature was significantly higher than that of F4 treatment by 7.87%~12.43% (P<0.05). In the middle and late stages of potato growth, the soil temperature and soil compactness of F2 treatment were lower than those of F3, F4 and CK treatments. In the whole potato growth stage, the topsoil pH value of CK treatment was the lowest, the soil available nitrogen content of F2 treatment was significantly lower than that of CK treatment by 18.24%~36.31% (P<0.05). The soil available potassium content of F2 treatment was significantly higher than that of F4 treatment by 8.31%~11.74% (P<0.05). The potato yield of F2 treatment was significantly higher than that of F1, F3 and F4 treatments by 8.01%~15.53% (P<0.05), but there was no significant difference between F2 and CK, and the commodity rate was significantly higher than that of other treatments by 5.99%~17.58% (P<0.05). In conclusion, the fertilization measures of 10% reduction of nitrogen fertilizer and full potassium fertilizer were the suitable fertilization strategies for green and high-yield cultivation of potato in Yulin sandy area.

Key words: potato（Solanum tuberosum L.）, fertilizer reduction, nitrogen fertilizer, potassium fertilizer, soil physicochemical properties, yield

CLC Number:

WANG Wen, WU Teng-shuai, LIU Meng-yuan, BAI Hai-qing, LIU Bo-lin. Effects of nitrogen and potassium fertilizer reduction on soil physicochemical properties and potato yield in sandy farmland[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(4): 64-69.

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