Journalartikel

Jahr der Veröffentlichung: 1976

Seiten: 1-17

Zeitschrift: Angewandte Botanik

Bandnummer: 50

Heftnummer: 1-2

ISSN: 0066-1759

Verlag: Vereinigung für Angewandte Botanik

Abstract: 
A new installation was described for fumigation with very low concentrations of H2S under defined climatic conditions. Fumigation of S. oleracea with 0.6 mg/m3 H2S had no influence, no necroses were visible, and photosynthesis was not affected when the fumigation lasted for a prolonged period of time. Under the influence of an H2S concentration of 1.2 mg/m3 a decline of photosynthesis was measured. The water loss and the described damages became stronger with the increase of the H2S concentration (2.5 mg/m3 and 4 mg/m3) and the duration of fumigation. Respiration was less sensitive to the fumigation than photosynthesis. Low fumigation concentration caused a small increase of respiration but there was a decline with a longer duration and a higher concentration of the gas. Based on the calculation of the amount of H2S which was offered to the test plants during the experiment there was found a limit value for the physiological processes studied: decline of respiration after a fumigation with 18-20 g H2S, of photosynthesis with 12-15 g H2S, and of the critical water saturation deficit with 15-18 g. The maximum difference of transpiration between fumigated and control plants was measured after 10-15 g H2S had passed the fumigation box. Necroses on the leaves were visible if 15-20 g H2S were offered. The toxic limit value of 2.5 mg H2S/m3 set by VDI [Society of German Engineers] seems to be too high.

Harvard-Zitierstil: OLIVA, M. and STEUBING, L. (1976) EFFECTS OF H2S FUMIGATION ON PHOTOSYNTHESIS, RESPIRATION AND WATER BUDGET OF SPINACIA-OLERACCA, Journal of applied botany = Angewandte Botanik, 50(1-2), pp. 1-17

APA-Zitierstil: OLIVA, M., & STEUBING, L. (1976). EFFECTS OF H2S FUMIGATION ON PHOTOSYNTHESIS, RESPIRATION AND WATER BUDGET OF SPINACIA-OLERACCA. Journal of applied botany = Angewandte Botanik. 50(1-2), 1-17.