Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (9): 2177-2182.DOI: 10.16178/j.issn.0528-9017.20250414

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Effects of spraying plant growth regulator and foliar fertilizer on the fruit cracking and quality of hybrid citrus Yangguang 1

MA Chuangju1(), WANG Dengliang1, SUN Jiancheng1, CHEN Jun1, XU Yanhui1, TONG Lu2, LIU Lili1()   

  1. 1.Quzhou Academy of Agricultural and Forestry Sciences,Quzhou 324000,Zhejiang
    2.Agriculture and Rural Affairs Bureau in Longyou County,Longyou 324400,Zhejiang
  • Received:2025-06-10 Online:2026-09-11 Published:2026-09-24
  • Contact: LIU Lili

Abstract:

Using hybrid citrus Yangguang 1 as the experimental material,plant growth regulators and foliar fertilizers were sprayed in the early flowering period(beginning of April),full flowering period(mid-April)and fruit enlargement period(mid-July). The effects of spraying plant growth regulators and foliar fertilizers at different growth periods on fruit cracking and quality were investigated. The results showed that compared with the control,each treatment could significantly (p<0.05)reduce the fruit cracking rate of Yangguang 1 and significantly increase the single fruit weight. The peel thickness of T4 treatment [spraying 30 μg·L-1 6-benzylaminopurine (6-BA)+50 μg·L-1 gibberellic acid (GA?) at the early flowering period, spraying 100 μg·L-1 GA3 at the full flowering period,and spraying 800 times Ca-Mg-B-Zn-Fe fertilizer at the fruit enlargement period] was significantly reduced. T3 (spraying 30 μg·L-1 6-BA+50 μg·L-1 GA? at the early flowering period, spraying 100 μg·L-1 GA3 at the full flowering period,and spraying 500 times potassium dihydrogen phosphate at the fruit enlargement period)and T4 treatments improved the color contribution index of fruit. Except for the decrease of solid-acid ratio of T7 treatment (spraying 200 μg·L-1 GA?+500 times potassium dihydrogen phosphate at the fruit enlargement period),the solid-acid ratio and vitamin C content of other treatments had no significant difference compared with the control. Principal component analysis showed that T3 treatment had the highest comprehensive score and overall effectiveness,which can be referenced for practical production.

Key words: plant growth regulator, foliar fertilizer, hybrid citrus, Yangguang 1, fruit cracking, quality

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