Nutrition. Plants are the only terrestrial organisms that convert inorganic carbon, oxygen, hydrogen, nitrogen, and sulfur to organic forms, via photosynthesis. They are called autotrophs (meaning “self-feeder”). - PowerPoint PPT Presentation
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Practical Horticulture 5th edition By Margaret J. McMahon, Anton M. Kofranek and Vincent E. Rubatsky
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Chapter 3 - Growing Plants for Human Use
NutritionNutrition
• Plants are the only terrestrial organisms that convert inorganic carbon, oxygen, hydrogen, nitrogen, and sulfur to organic forms, via photosynthesis.
– They are called autotrophs (meaning “self-feeder”).
• Humans, and just about everything else that live on land are heterotrophs (or “other feeders”).
– Because they feed off autotrophs or other heterotrophs.
Practical Horticulture 5th edition By Margaret J. McMahon, Anton M. Kofranek and Vincent E. Rubatsky
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Chapter 3 - Growing Plants for Human Use
NutritionNutrition
An adult needs about 70 grams of protein in a day.Plant foods, especially cereal grains and pulses (peas & beans),often provide enough protein along with the energy they supply.
Practical Horticulture 5th edition By Margaret J. McMahon, Anton M. Kofranek and Vincent E. Rubatsky
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Chapter 3 - Growing Plants for Human Use
NutritionNutrition
• Vitamin C is found only in fresh fruits and vegetables.
• Vitamin A is derived from carotene, found in green, yellow, orange, or red fruits, vegetables, and grains.
• Vitamin B12 is not provided by plants. – Cyanocobalamin is manufactured by bacteria, especially
in ruminant organisms, is available in meat & dairy foods.
• We require six major inorganic nutrients—calcium, phosphorus, magnesium, sodium, potassium, chloride—and seven micronutrients.– All can be obtained from plant foods, although
Practical Horticulture 5th edition By Margaret J. McMahon, Anton M. Kofranek and Vincent E. Rubatsky
tab
Chapter 3 - Growing Plants for Human Use
NutritionNutrition
• In moist, temperate parts of the world, it is easy to forget how much water is needed to produce crops.– It can take a ton of water to produce a kilogram of grain.
• In dry areas, a large land surface may be needed to collect water to be used for irrigation to grow crops.– Water needs in arid locations cause political problems.