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Plant Nutrition

Plant Nutrition. All plants are autotrophs make their own carbohydrates but still require other nutrients. Macronutrients. Carbon from CO 2 Oxygen from H 2 O, O 2 Hydrogen from H 2 O Nitrogen Potassium, Calcium, Magnesium, Phosphorous, Sulfur. Healthy. Chlorine-deficient.

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Plant Nutrition

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  1. Plant Nutrition • All plants are autotrophs • make their own carbohydrates but still require other nutrients

  2. Macronutrients • Carbon • from CO2 • Oxygen • from H2O, O2 • Hydrogen • from H2O • Nitrogen • Potassium, Calcium, Magnesium, Phosphorous, Sulfur

  3. Healthy Chlorine-deficient

  4. Copper-deficient Zinc-deficient

  5. Importance of Soil • Soil = the highly weathered upper layer of the earth’s crust • Topsoil - where roots occur • uppermost layer of soil • mixture of mineral particles of various sizes (from coarse sand to silt to fine clay), living organisms and humus (partly decayed organic matter)

  6. Importance of Soil • Plant growth is significantly influenced by the nature of the soil

  7. Water Holding Capacity • Clays may hold water so tightly it is unavailable to plants • Sands allow water to drain very rapidly • most water is removed by gravity to lower levels • Ideal soil is a mixture of coarse and fine particles

  8. Soil Fertility • Its ability to support plant growth • nutrients must be replenished in soil • decomposition & nitrogen fixation • fertilization • Chemically or organically (manure, dead animals) adding nutrients to the soil • crop rotation

  9. Plant Symbioses • Plants have evolved symbioses with other organisms that increase their efficiency at removing nutrients from soil

  10. Found in 90% of vascular plants -more common

  11. Found in legumes

  12. Carnivorous plants • Some plants obtain nitrogen directly from other organisms, just as animals do. • Usually grow in bogs with acidic soil that is not favorable to the growth of nitrifying bacteria • venus fly trap, pitcher plants, bladderworts and sundews

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