Nutrients213-page3

Nutrients213-page3 - nutrients will appear in new growth....

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Plant Nutrients and Soils - 3 Mineral Deficiencies in Plants Plants, just like people, may exhibit a variety of mineral deficiency symptoms. We should be able to examine some of these first-hand in the greenhouse. The specific symptoms depend on the function of the nutrient, and the mobility of the nutrient within the plant. Plants lacking nitrogen or phosphorus often produce anthocyanin pigments in stems and leaves. Necroses at leaf tips and margins are symptoms of potassium deficiency. Magnesium, for example, is required for chlorophyll synthesis, so plants lacking magnesium are chlorotic, or yellowish. Nutrients that are mobile will be translocated from older parts of plants to newer growth, and deficiency symptoms of those nutrients will appear in older growth first. Deficiencies of non-mobile
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Unformatted text preview: nutrients will appear in new growth. Calcium deficiency, for example, is exhibited in new growth. The terminal bud usually dies. A key to mineral deficiency symptoms is reproduced at the end of these notes. (As an aside, the three most common deficiencies in plant growth are nitrogen, phosphorus and potassium. Micronutrient deficiencies are rare and localized.) Mineral deficiency in plants is studied by setting up hydroponic cultures that have nutrient solutions, each of which is missing one nutrient to be compared with a complete solution, all grown within the same environmental situation. Complete Lacking Complete nutrient solution Chlorine deficient Copper deficient Zinc deficient Potassium deficient Phosphorus deficient Magnesium deficient...
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