Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (17): 26-30.doi: 10.11924/j.issn.1000-6850.casb19020068

Special Issue: 马铃薯

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The Optimal Fertilization for High Anthocyanin Sweet Potato Variety ‘Mianzishu 9’

Zhu Ling1, Shen Xueshan2, Qu Huijuan1(), Wang Ping2, Pu Zhigang1, Wang Xiaoli2, Huang Jingwei3   

  1. 1 Institute of Biotechnology and Nuclear Technology, Sichuan Academy of Agricultural Sciences, Chengdu 610066
    2 Sichuan Academy of Agricultural Sciences, Chengdu 610066
    3 Chengdu University, Chengdu 610606
  • Received:2019-02-27 Revised:2019-05-31 Online:2020-06-15 Published:2020-06-09
  • Contact: Qu Huijuan E-mail:qhjuan120@126.com

Abstract:

Aiming to select the optimum fertilization for high anthocyanin sweet potato variety ‘Mianzishu 9’ in the hilly region of middle Sichuan, the orthogonal design with ternary quadratic general combining method was applied to explore the effects of nitrogen, phosphorus and potassium on the fresh tuber yield and anthocyanin content. The results showed that the regression terms of ternary quadratic regression equation on both fresh tuber yield and anthocyanin content reached extremely significant levels, but did not reach significant levels on dry matter rate. The influence of three fertilization factors on fresh tuber yield was nitrogen> phosphorus> potassium, on anthocyanin content of tuber was potassium> nitrogen> phosphorus. The optimal fertilization for fresh tuber yield more than 37500 kg/hm2 was: nitrogen 207.27-218.22 kg/hm2, phosphorus 97.18-147.11 kg/hm2, and potassium 207.27-218.22 kg/hm2, respectively. The optimal fertilization for anthocyanin content of tuber more than 102 mg/100 g DW was: nitrogen 126.16-158.43 kg/hm2, phosphorus 110.13-136.74 kg/hm2, and potassium 119.62-151.69 kg/hm2, respectively.

Key words: high anthocyanin content, sweet potato, ‘Mianzishu 9’, optimal fertilization technique, yield

CLC Number: