Full resolution (JPEG) - On this page / på denna sida - Sidor ...
<< prev. page << föreg. sida << >> nästa sida >> next page >>
Below is the raw OCR text
from the above scanned image.
Do you see an error? Proofread the page now!
Här nedan syns maskintolkade texten från faksimilbilden ovan.
Ser du något fel? Korrekturläs sidan nu!
This page has never been proofread. / Denna sida har aldrig korrekturlästs.
SVENSK BOTANISK Tipskrirt. 1924. Bp. 18, H. 3.
A STUDY ON THE INFLUENCE OF THE RATIO
BETWEEN SODIUM AND CALCIUM IN A VERY
DILUTE NUTRIENT SOLUTION UPON THE
GROWTH OF SVALÖF’S DALA-OATS
BY
CARL PHILIPSON.
The influence of the ratio between different ions in the food
solution has been studied by various investigators and has been
found to be well distinguishable from the nutritive effect of the
salts. (See ÖSTERHOUT 1907, p. 317 [13]. As soon as relatively
high concentrations are used, it has been proved that a certain
mixture of two salts is optimal for the growth of a plant during
a certain period — the proportions of the salts in the optimal
mixture being fixed by the concentration of the solution, the na-
ture of the salts and the demands of the plant. This phenome-
non, having been regarded as caused by toxicity and antitoxicity
of the ions, has been called antagonism. (See ÖSTERHOUT 1922,
p. 124 [19]. In order to remove any pre-conceived view of the
causality of the phenomenon from the definition of the term, we
propose to limit the significance of the term antagonism in this
paper, to the effect of the ratio between certain
ions upon plant growth, distinguished from the
pure nutritive effect of the corresponding salts,
whatever the cause of the first effect may be. This has been
done on account of the complication of the problem caused by
using a very dilute solution. |
For an investigation of this problem has to reckon with a very
essential difficulty, which as being inherent in the problem itself,
<< prev. page << föreg. sida << >> nästa sida >> next page >>
