Chapter 1 Essential elements
Chapter 1 Essential elements
Concept of plant nutrition a Plant nutrition is a term that takes into account the interrelationships of mineral elements in the growth medium as well as their role in plant growth
◼ Plant nutrition is a term that takes into account the interrelationships of mineral elements in the growth medium as well as their role in plant growth. Concept of plant nutrition
Concept of plant nutrition Complex interactions involving weathering(风化) of rock minerals, decaying(腐解) of organic matter such as humus and residues of plant animals, and microbes, take place to form inorganic minerals in SO
Concept of plant nutrition ◼ Complex interactions involving weathering（风化） of rock minerals, decaying(腐解） of organic matter, such as humus and residues of plant ,animals, and microbes, take place to form inorganic minerals in soil
Concept of plant nutrition Roots absorb mineral nutrients as ions in soil water. Many factors influence nutrient upta ke for plants. This interrelationship involves a complex balance of mineral elements essential and beneficial for optimum plant growth
◼ Roots absorb mineral nutrients as ions in soil water. Many factors influence nutrient uptake for plants. ◼ This interrelationship involves a complex balance of mineral elements essential and beneficial for optimum plant growth. Concept of plant nutrition
Essential elements The material of living plants consist of organic matter, water and minerals. The percentage distribution of these three components is in the following order of magnitude Water 70%(fresh matter) Organic material 27%(fresh matter) Minerals 3%(fresh matter)
Essential elements ◼ The material of living plants consist of organic matter, water and minerals. The percentage distribution of these three components is in the following order of magnitude: ◼ Water 70%(fresh matter) ◼ Organic material 27%(fresh matter) ◼ Minerals 3% (fresh matter)