POTASSIUM CHLORIDE CAS N°: 7447-40-7

OECD SIDS
POTASSIUM CHLOR
Date: 30-MAR-2003
4. Ecotoxicity Substance ID: 7447-40-7
4.9 Additional Remarks
Type:
Remark:
Effects of potassium and chloride on plant diseases
Generally, potassium tends to improve the plant’s
resistance towards several diseases, and the
potassium effect appears to be related to soil K
status. An adequate K supply is of notable
importance for plants to make protective
chemicals and barriers that restrict the progress
of an infection and compensate for any damage
through new growth. Application of K is shown to
reduce the damage from bacterial leaf blight,
sheat blight and stem rot in rice; black rust in
wheat; sugary disease in sorghum; and bacterial
leaf blight in cotton. The ability to resist
bacterial and fungal diseases often depends on
the N:K ratio.
Chloride may hinder the plant disease take-all in
wheat due to its apparent action as a
nitrification inhibitor: Cl forces the plant to
take up more N as NH
+
4 with exchange of hydrogen
ions; this makes the soil at the root surface
more acidic, and some microbes that thrive under
acidic conditions inhibit the development of
take-all. Chloride also decreases the NO
-
3
concentration in plants. Reduced NO
-
3 may result
in fewer attacks of common root rot on barley.
Source:
Norsk Hydro ASA
Reliability: (1) reliable without restrictions
Flag:
non confidential
01-MAR-2001 (37)(60)
Remark:
Source:
Reliability:
Flag:
01-MAR-2001
Biological effects, and biotransformation and
kinetics of potassium and chloride in humans is
reported under item 5.10.
Norsk Hydro ASA
(1) reliable without restrictions
non confidential
62
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