Information On Chloride And Plant Growth

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By Jackie Rhoades

One of the most recent additions to the list of micronutrients is chloride. In plants, chloride has been shown to be an important element for growth and health. Though the condition is rare, the effects of too much or too little chloride on garden plants may mimic other, more common, problems.

Effects of Chloride in Plants

Chloride in plants comes mostly from rainwater, sea spray, dust and, yes, air pollution. Fertilization and irrigation also contribute to chloride on garden soil.

Chloride is easily dissolved in water and enters the plant through soil and air. It is essential to the chemical reaction that allows the opening and closing of the plant’s stomata, tiny pores that allow gas and water to be exchanged between the plant and the air around it. Without this exchange, photosynthesis can’t occur. Sufficient chloride on garden plants may inhibit fungal infections.

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Chloride deficiency symptoms include wilting due to restricted and highly branched root systems and leaf mottling. Chloride deficiency in members of the cabbage family is easily detected by the lack of cabbage odor, although research has yet to discover why.

Too much chloride on garden plants, such as those grown at poolside, will result in the same symptoms as salt damage: Leaf margins may be scorched, leaves will be smaller and thicker and overall plant growth may be reduced.

Chloride Soil Test

Adverse effects of chloride and plant growth are rare because the element is so readily available through a wide variety of sources and excesses are easily leaches away. General analyses rarely contain a chloride soil test as part of the typical panel, but most laboratories can assay for chloride if requested.

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