Articles
LACK OF RELATIONSHIP BETWEEN TOTAL CALCIUM OF APPLE FRUIT AND A CALCIUM DEFICIENCY RELATED DISORDER (BITTER PIT): A FOUR YEAR REPORT
Article number
274_15
Pages
141 – 148
Language
Abstract
During a four year trial, "Cooper 4" apples were treated at different times after full bloom with 0.15%, 0.21% or 0.30% CaCl2. Bitter pit severity was evaluated at harvest time and at the end of storage.
Ca, Mg and K content of the whole fruit or of the calyx end, was analysed by atomic absorption spectrophotometry.
No relationship between bitter pit incidence and Ca or Mg or K or K/Ca or (K+Mg)/Ca was found to be statistically significant.
Ca treatments effectively reduced bitter pit, but they couldn’t increase the total Ca amount or reduce the total Mg or K concentration of the fruits.
The Ca threshold value of 5 mg/100 g fresh weight was found to be ineffective in predicting bitter pit at harvest.
Ca, Mg and K content of the whole fruit or of the calyx end, was analysed by atomic absorption spectrophotometry.
No relationship between bitter pit incidence and Ca or Mg or K or K/Ca or (K+Mg)/Ca was found to be statistically significant.
Ca treatments effectively reduced bitter pit, but they couldn’t increase the total Ca amount or reduce the total Mg or K concentration of the fruits.
The Ca threshold value of 5 mg/100 g fresh weight was found to be ineffective in predicting bitter pit at harvest.
Authors
G. Gallerani, G.C. Pratella, P. Bertolini, A. Marchi
Keywords
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