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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (34): 9-15.doi: 10.11924/j.issn.1000-6850.casb2023-0334

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Research on the Optimized Fertilization Technology of the New Sweet Potato with Red Heart Variety ‘Pushu 17’ Based on the “3414” Experiments

ZHONG Yuyang(), CUI Jichao, YU Jinjiang, WU Xiaoxia, HONG Dingkai, ZHENG Jianyang   

  1. Putian Institute of Agricultural Sciences, Putian, Fujian 351100
  • Received:2023-04-25 Revised:2023-09-23 Online:2023-12-05 Published:2023-11-30

Abstract:

To provide scientific basis for the high-yield and efficient cultivation of the new variety sweet potato with red heart ‘Pushu 17’, we studied the effect of combined application of nitrogen, phosphorus and potassium on yield and fertilizer effect based on “3414” experimental design scheme. The results showed that the main factor affecting the yield of ‘Pushu 17’ was the application of potassium fertilizer, followed by nitrogen fertilizer and phosphorus fertilizer. The interaction effect between nitrogen, phosphorus and potassium could affect the yield of ‘Pushu 17’. The effect function of the application amount of nitrogen, phosphorus and potassium and the yield of ‘Pushu 17’ potato was optimized. Maximum fertilization amounts of the highest yield (55646.98 kg/hm2) were nitrogen fertilizer 206.88 kg/hm2, phosphorus fertilizer 100.37 kg/hm2, potassium fertilizer 252.86 kg/hm2, and the ratio was 1:0.49:1.22. The best amount of fertilization were nitrogen fertilizer 199.42 kg/hm2, phosphorus fertilizer 95.40 kg/hm2, potassium fertilizer 238.50 kg/hm2, with the ratio was 1:0.48:1.2. The corresponding optimal fresh sweet potato production was 55574.07 kg/hm2.

Key words: sweet potato with red heart, ‘Pushu 17’, 3414, fertilizer effect, yield