Abstract
Chicory of radicchio type is a vegetable similarly cultivated to head lettuce, yet featuring relatively longer plant growing period. Most of this crop cultivars characterize
intensive red color of leaves and white leaves venation. Field experiment carried out in 2005–2007 involved cultivation, from transplants, of radicchio type chicory of ‘Indigo’
cultivar for autumn harvest. Seeds were sown at the end of June and seedlings were transplanted to their final stand in the first week of August. Chicory heads harvesting took
place in the half of October and in its course there were estimated the following parameters: total and marketable yield, as well as, in edible parts, the content of .nitrates, macroelements, dry matter, reducing and total sugars and vitamin C. The highest marketable yield of chicory in autumn cultivation was provided by nitrogen fertilization in the dose of
150 kg N·ha-1 , the whole amount applied once, previously to plant growing period. Intensive nitrogen fertilization contributed to higher amount of accumulated nitrates, potassium,
calcium, magnesium, reducing and total sugars, as well as vitamin C.
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