Genetical and nutritional influences on the spear quality of white asparagus (Asparagus officinalis L.)

摘要: Asparagus is a vegetable of high nutritional and economic relevance. The main objective the present research work was to investigate influence genotype, cultivation region sulfur nitrogen supply on quality parameters white asparagus spears. Crop performance trials were carried out in 2001 with 15 cultivars at Burgwedel 5 Wiemersdorf order study effect genotype In 2000 an extended field survey conducted regions Braunschweig Erfurt spear quality. different locations Germany, response four investigated. Under greenhouse conditions, Mitscherlich pot large experiments N S growth, yield chemical composition asparagus. results investigations can be summarized as follows: 1. grown showed significant differences glutathione, S, Ca, nitrate, sulfate, Mn, Fe Cu content. cultivar Eposs had highest glutathione content 20.5 µmol g-1. 2. no protein among both sites. 3. higher sulfate than those Wiemersdorf. 4. Regional spears between for Mg sulfate. 5. fertilization positive 6. significantly increased second harvest season but ascorbic acid 7. only seasons.