Beziehung zwischen der Eisenversorgung von Weinreben und dem pH-Verlauf in der Nährlösung
DOI:
https://doi.org/10.5073/vitis.1978.17.152-160Abstract
Relation between iron supply to grapevine and pH pattern in the nutrient solution
In water culture experiments the effects of iron deficiency (-Fe) and iron supply as FeEDTA (control) or Fe(OH)3 on the pH pattern in the nutrient solution in the harvest composition, the wine pH and the level of free SO2 are also signifiner" have been studied.
With sufficient iron (FeEDTA), the pH of the nutrient solution increased from 6 to approximately 7 during the experiment. However, the pH decreased under iron stress (-Fe or Fe(OH)3) to as low as 4. Simultaneously with this decrease in pH, chlorosis occured on the young leaves; with Fe(OH)3-supply, however, the pH rose again after some days, accompanied by regreening of the leaves. At harvest, the young leaves of the Fe(OH)3 treatment contained more iron and the chlorophyll content was at least as high as in the control (FeEDTA). Nevcrtheless, with Fe(OH)3 the shoot growth was clepressed as much as in plants without iron supply (-Fe).
The results indicate that like other dicotyledonous plant species, grapevine is also able to lower the pH of the growth medium under iron stress and utilize inorganic Fe-III compounds even in well aeiated systems. This regulation mechanism is probably of considerable im~)ortance for the iron uptake from soils low in iron availability.
Downloads
Published
Issue
Section
License
The content of VITIS is published under a Creative Commons Attribution 4.0 license. Any user is free to share and adapt (remix, transform, build upon) the content as long as the original publication is attributed (authors, title, year, journal, issue, pages) and any changes to the original are clearly labeled. We do not prohibit or charge a fee for reuse of published content. The use of general descriptive names, trade names, trademarks, and so forth in any publication herein, even if not specifically indicated, does not imply that these names are not protected by the relevant laws and regulations. The submitting author agrees to these terms on behalf of all co-authors when submitting a manuscript. Please be aware that this license cannot be revoked. All authors retain the copyright on their work and are able to enter into separate, additional contractual arrangements.