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Vitamin C content in four cultivars of zucchini as related to fruit size and harvest date

Waldemar Kmiecik, Zofia Lisiewska

Department of Fruit and Vegetable Processing
Faculty of Agriculture, Agricultural University of Kraków
Podłużna 3, 30-239 Kraków, Poland

The vitamin C content was determined in the cultivars Astra, Paskowana, Greyzini F1, and Storr's Green F1 during three growing seasons (1986-1988). Moreover, in 1986 three dates of harvest (the beginning, full fruiting, and the end of the fruiting season) and five size grades of fruit were taken into consideration. The size grades at 30 mm intervals included fruit from 100-250 mm in length. The vitamin C content varied from 18.1-51.0 mg/100 g of fresh mass. The compared cultivars hardly differed with regard to the vitamin C content, with extreme differences not exceeding 6%. Greater differences were found between the years of the experiment and the size grades of fruit. The smallest vitamin C content was found during mid-season of fruiting and the largest one towards the end of this period. With respect to fruit size, the vitamin C content decreased with the increasing lenght of zucchini, from 40.3 mg/100 g to 25.8 mg/100 g of fresh mass on the average.

Kmiecik W., Lisiewska Z., 1989. Vitamin C content in four cultivars of zucchini as related to fruit size and harvest date. Folia Horticulturae I/2: 27-36.