INFLUENCE OF PROVENANCE AND HARVEST DATE ON SOME QUALITY PROPERTIES OF HORSE RADISH (ARMORACIA RUSTICANA PH. GAERTN. B. MEY. ET SCHERB.) FOR PRESERVATION PURPOSES
Two-year experiments were conducted with horse radish of different provenance: 'Edelkofener', 'Hamburger', 'Jugoslawischer', and 'Steirischer'. The provenances were harvested five times each, from late August until frosts appeared. Subject for investigation was the crop undergoing changes in yield quantity, dry matter, carbohydrates, vitamin C, and the content as well as the composition of mustard seed oil. Results were as follows:
- Yields increased considerably from harvest to harvest and differed widely between the provenances. The highest amount of salable main roots of horse radish was produced by 'Edelkofener'.
- Dry matter increased with crop development up to the 4th harvest, but then decrease was observed for all of the provenances harvested at the latest date. The highest dry matter values (28.9 % on an average) were found for 'Edelkofener'.
- Vitamin C decreased with later harvest, the highest values being assessed for 'Hamburger' and the lowest levels for 'Steirischer'.
- Starch levels originally increased with advanced growth up to the 3rd harvest, but then decreased strongly. Quite the reverse it was for sucrose: High starch values were associated with low sucrose levels, and vice versa.
- The highest content of allylisothiocyanate was assessed for 'Steirischer'. Values vor allylisothiocyanate increased with advanced crop development, i.e. later harvest date, while phenylethylisothiocyanate levels decreased.
Effects of storage procedures on the harvested crop will not be subject of this paper.
Fritz, D., Weichmann, J. and Nebel, H. (1988). INFLUENCE OF PROVENANCE AND HARVEST DATE ON SOME QUALITY PROPERTIES OF HORSE RADISH (ARMORACIA RUSTICANA PH. GAERTN. B. MEY. ET SCHERB.) FOR PRESERVATION PURPOSES. Acta Hortic. 220, 425-432