SALINITY Chemische Eigenschaften,Einsatz,Produktion Methoden
Definition
The saltiness of natural water. The salin-
ity of normal seawater is 35 parts salt per 1000 parts
water.
Landwirtschaftliche Anwendung
A saline solution is a liquid impregnated with, or
containing salt(s). Salinity of saturated soil extracts is
determined by its electrical conductivity (EC) ,
expressed as decisimens per meter (dS/m).
Soils containing large quantities of soluble salts and
exchangeable sodium that interfere with the growth of
most crop plants are known as saline sodic soil.
Saline soil is a soil, the saturation water extract of
which has an electrical conductivity of more than 4
dS/meter and an exchangeable sodium concentration less
than 15 % (or sodium adsorption ratio less than 13).
Salinity and sodicity of soils are two unfavorable
conditions for plant growth. Correct identification of the
problem is necessary for its correct reclamation. Saline
soil is a non-sodic soil containing many soluble salts (that
may not be tolerated by plants) and having an EC < 4 dS/m.
Dominant ions under saline conditions are calcium
(Ca
++), magnesium (Mg
++), chloride (Cl
-), bicarbonate
(HCO;) and carbonate (CO3
2-). A high salt concentration
in soils increases the water-holding capacity of the soil
particles. This makes it increasingly difficult for plants to
use the water. Another feature of salinity is the toxicity of
one or more ions of the salt. Plants suffering from salt
damage may show leaf scorching, indicating toxicity of
sodium or chloride; leaves may become yellow
prematurely, wither and drop. Often, such plants look
dull and dark and grow stunted.
SALINITY Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
