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Paper Information

Journal:   IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE)   2007 , Volume 37 , Number 6; Page(s) 1131 To 1139.
 
Paper: 

THE EFFECT OF CALCIUM CHLORIDE SPRAY ON QUALITY AND STORAGE CHARACTERISTICS OF TWO GRAPE CULTIVARS “RISHBABA" AND "GHZLOUZUM"

 
 
Author(s):  DOULATI BANEH A.A.H.*, ZOMORODI SH., GHANI SHAYESTEH F.
 
* AGRICULTURAL AND NATURAL RESOURCES RESEARCH CENTER OF WEST AZARBAIJAN
 
Abstract: 
In order to improve grape quality during handling and storage, this research was conducted in a Factorial experiment using a completely randomized block design (CRBD) with three factors and three replications. Factors included CaCl2 concentration at four levels (0, 0.5, 1, and 1.5%), two grape cultivars (Rishbaba and Ghzlouzum) and two spray times (10 and 20 days before harvest). One vine was employed in each experimental unit, and in total 48 vines was used. At harvest, the ripen fruits were picked and packed in 48 woody boxes and transferred to cold storage. Before being transferred to storage, and in cold storage (in monthly intervals), some berry traits including Brix (TSS), pH, titrable acidity (TA), loss of weight, dropping and browning rate, calcium content and percent decay were measured. Results indicated that Ca content of fruit increased in 0.5 % CaCl2 spray treatments' also the Ca and K content of rachis being increased in the range of 0 to 1 percent CaCl2 applications. The effect of other levels of CaCl2 treatment on those traits wasn't significant. Spray of CaCl2 20 days before harvest increased the berry calcium content. The highest contents of Brix, TA, berry and rachis calcium, rachis K and the lowest pH rates were found in Rishbaba grape.
During fruit storage, the amount of TSS, pH and loss of weight increased while TA of fruit juice decreased. The effect of CaCh treatments (between 1 and 1.5 %) on the rate of fungal decay was not significant but it was less than that in control. Fruit appearan0063ein Rishbaba cultivar was better, and decay rate less than that in Ghzlouzum grape.
 
Keyword(s): GRAPE, COLD STORAGE, CACI2, AND SPRAY TIME
 
References: 
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