HOME PRODUCT FEATURES & BENEFITS Chloride sensitivity in crops
Chloride sensitivity in crops PDF Print E-mail

High levels of chloride in the soil solution will result in chloride toxicity in the plant (Table 1) (Libro Azul, 2002). A number of crops are known for being sensitive to chloride: fruit crops (almond, apricot, avocado, banana, citrus, grapes, mango, peach), berries (incl. strawberry), vegetables (lettuce, onions, sweet pepper), field crops (potato, tobacco), coffee and flowers.


Elevated chloride levels, when allowed to exist, may directly result in plant toxicity, or reduce the quality of the harvested part of the plant. Examples of reduced quality are: reduction in the dry matter content of potato tubers, reduced combustibility and “Wet dog” symptoms in tobacco (tobacco becomes dark and smelly after packing), and a reduced percentage of extractable sucrose in sugar cane. Furthermore, plants may tolerate chloride well, but not the associated increase in soil salinity (e.g. banana).


Table 1. Tolerance of fruit and other crops to different chloride levels in the saturated soil extract.

Fruit crops

Chloride level in the saturated soil extract

mmol/litre

ppm

Citrus

10-25

350-875

Stone fruit

7-25

245-875

Avocado

5-8

175-280

Grape

10-25

350-875

Berries

10

350

Strawberry

5-8

175-280

Other crops

Sugar beet

90

3.150

Tomato

39

1.365

Geranium

30

1.050


Table 2 shows the risk of chloride toxicity in plants at different chloride levels in the irrigation water (Libro Azul, 2002).


Table 2. Risk of chloride toxicity in plants at different chloride levels in the irrigation water.

Chloride in water

Comments

mmol/l

ppm

<2

<70

In general, safe for all plants

2-4

70-140

Sensitive plants usually show light to moderate toxicity effects

4-10

140-350

Moderately tolerant plants show light to substantial toxicity effects

>10

>350

May cause severe problems


Reference:

Libro Azul. 2002. Manual de fertirriego de SQM. 3 ed. Ed. by Samuel Román C.

 

^ Go to the top   

Foliar applied potassium nitrate induced salt tolerance in bottle gourd, grown under saline conditions. Read more ...
Potassium nitrate outperformed alternative K-sources of processing tomato in terms of yield and quality. Read more ...