Journal of Tianjin Agricultural University ›› 2022, Vol. 29 ›› Issue (3): 14-18.doi: 10.19640/j.cnki.jtau.2022.03.003

• Researches and Scientific Notes • Previous Articles     Next Articles

Effects of potassium fertilization on the quality of ‘Muscat Hamburg’ grapes

Yan Yusi, Lu Jun, Song Ke, Li Bing, Yang JinghuiCorresponding Author, Zhang Chao   

  1. College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin 300392, China
  • Received:2021-02-21 Online:2022-09-30 Published:2022-10-10

Abstract: In order to explore the effects of potassium fertilizer on the quality of ‘Muscat Hamburg’ grapes, the effects of three potassium fertilization(30, 40 and 50 kg/667m2)on fruit quality(hardness, fruit shape index, water content, soluble solids, soluble sugar, titratable acid, soluble protein, and VC content)were studied using 6-year-old ‘Muscat Hamburg’ grapes as the test material. The results showed that when the potassium fertilization was 30 kg/667m2, the hardness(1.03 kg/cm2), soluble sugar content(5.37 mg/g)and fruit shape index(1.2)of the fruit was the highest, which was significantly higher than other treatments and its titratable acid content(0.22%)and the water content(74.35%)were significantly lower than other treatments. The comprehensive analysis of the membership function showed that the potassium fertilization treatment 30 kg/667m2 had the best comprehensive quality of the fruit, with an average membership function value of 1.16, followed by the treatment of 40 kg/667m2, with an average membership function value of 0.80. Therefore, supplementary application of 30 kg/667m2 potassium fertilization can significantly improve the quality of ‘Muscat Hamburg’ grapes.

Key words: ‘Muscat Hamburg’ grapes, quality, potassium

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