Abstract
Asparagus is a vegetable of high nutritional and economic relevance. The main objective of the present research work was to investigate the influence of genotype, cultivation region and sulfur and nitrogen supply on quality parameters of white asparagus spears. Crop performance trials were carried out in 2001 with 15 cultivars at Burgwedel and with 5 cultivars at Wiemersdorf in order to study the effect of genotype on quality parameters of spears. In 2000 an extended field survey was conducted in the regions of Braunschweig and Erfurt to study the influence of the cultivation region on spear quality. In field trials at different locations in Germany, the response of four asparagus cultivars to sulfur supply was investigated. Under greenhouse conditions, Mitscherlich pot and large pot experiments were carried out to study the influence of N and S supply on growth, yield and chemical composition of asparagus. The main results of the investigations can be summarized as follows: 1. Asparagus cultivars grown in Burgwedel showed significant differences in glutathione, S, Ca, nitrate, sulfate, Mn, Fe and Cu content. The cultivar Eposs had the highest glutathione content with 20.5 µmol g-1. 2. Asparagus cultivars showed no significant differences in the protein content among both sites. 3. Asparagus cultivars grown in Burgwedel had higher S and sulfate content than those grown in Wiemersdorf. 4. Regional differences in the composition of asparagus spears were significant between the Erfurt and Braunschweig region for Ca, Mg and sulfate. 5. S fertilization had a significant positive influence on the S and sulfate content of spears. 6. S supply significantly increased spear yield in the second harvest season but N supply had no significant effect on spear yield and ascorbic acid content. 7. S supply significantly increased glutathione content only in the second season and ascorbic acid content of spears in both seasons.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
