Journal of Zhejiang Agricultural Sciences ›› 2025, Vol. 66 ›› Issue (7): 1592-1597.DOI: 10.16178/j.issn.0528-9017.20240037

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Effects of different fertilizer treatments on growth characteristics and yield of sweet potato

ZHAO Hanwei(), CHENG Rundong, JI Hongting, WANG Shihong, WANG Yong, ZHAO Hejuan, ZENG Yannan()   

  1. Nanjing Institute of Agricultural Sciences in Jiangsu Hilly Area, Nanjing 210046, Jiangsu
  • Received:2024-01-12 Online:2025-07-11 Published:2025-07-28

Abstract:

To investigate the effects of different fertilizer treatments on the growth characteristics and yield of sweet potatoes and identify suitable fertilizers for sweet potato cultivation in hilly upland areas, this experiment utilized the fresh sweet potato variety Xinxiang and implemented four treatments: control (CK), compound fertilizer, specialized formula fertilizer for sweet potatoes, and organic fertilizer. The results showed that compared with CK, all fertilization treatments significantly increased relative chlorophyll content by 10.10%-12.59%. The three fertilizer treatments also increased main vine length, stem diameter, and aboveground fresh weight to varying degrees, while only A3 significantly increased branch number by 18.39%. Compared with CK, the marketable tuber rates of A1, A2, and A3 treatments increased by 8.95, 14.84, and 5.84 percentage points, respectively. All three fertilizer treatments significantly enhanced fresh tuber yield and dried tuber yield, with the specialized formula fertilizer achieving the highest increases (29.63% for fresh weight and 33.81% for dried tuber yield). In conclusion, the specialized formula fertilizer for sweet potatoes significantly improved fresh and dried tuber yields, elevated marketable tuber rates, and demonstrated the best yield-enhancing effects.

Key words: sweet potato, fresh weight, dry weight, yield, growth characteristics

CLC Number: