Effect of some environmental conditions on quality of the radish Raphanus sativus L. I. Biological value
Maria Gawęda, Zofia Kopecka, Ewa Capecka
Institute of Vegetables and Ornamental Plants
Faculty of Horticulture, Agricultural University
29 Listopada 54, 31-425 Kraków, Poland
The effect of environmental conditions on the levels of some important
organic and mineral compounds in the radish was investigated. The two-year
(1989, 1990) experiments concerned the following cultivars: Ostergruss Różowa
and the Japanese radish Tokinashi (early cultivars), and Monachijska Biała
and Murzynka (late cultivars). Three sowing dates were applied: early
spring (1st decade of April), early summer
(2nd decade of June), and late
summer (3rd decade of July). Considerable differences in chemical
composition between the two radish groups were observed. The early
cultivars had low dry weight, crude fibre, and isothiocyanate levels but a
fairly high content of vitamin C. The late cultivars had approximately
twice as great dry weight and contained considerable amounts of
isothiocyanates, crude fibre, protein, and macroelements (except for potassium).
The early radishes reached the highest biological value in crops from the April sowing (the highest
levels of potassium, protein, iron, zinc, and copper). The late radishes
sown in July gave material of better storage ability (greater dry weight,
larger content of sugars, crude fibre, phosphorus, calcium, magnesium).
Gawęda M., Kopecka Z., Capecka E., 1991. Effect of some environmental conditions on
quality of radish (Raphanus sativus L.). I. Biological value. Folia Horticulturae III/1: 47-59.