chapter 3 Mineral Nutrition
chapter 3 Mineral Nutrition
The elements in Plant Dry ma 水分(10%-95%) 植物材料 105 干物质(5%-90%)600C 有机物质(90%-95%发 灰分(5%-10%残烬
植物材料 ( ) ( ) ( ) ( ) − − − − 灰分 残烬 有机物质 挥发 干物质 水分 5% 10% 90% 95% 5% 90% 600 10% 95% 105 C C The Elements in Plant Dry matter
Methods of Studying Plant Nutrition Solution (A)培养液生长体系 culture 植物支撑体系 method 营养液 气泡 (B)营养膜生长体系 营养液 逻亚逻 营养再生室 (C)气培生长体系 营养液气室 植物体固定在封盖上
Methods of Studying Plant Nutrition Solution culture method
The essential Nutrient elements Nutrient elements that are required for the growth and development of plants Criteria a) In its absence the plant is unable to complete a normal life cycle b Or that element is part of some essential plant constituent or metabolite c)Must act directly
The Essential Nutrient Elements ➢ Definition: Nutrient elements that are required for the growth and development of plants ➢ Criteria: a) In its absence the plant is unable to complete a normal life cycle. b) Or that element is part of some essential plant constituent or metabolite. c) Must act directly
The essential Nutrient elements Macronutrients Required in large amounts Micronutrients Required in relatively small quantities
The Essential Nutrient Elements ➢ Macronutrients: • Required in large amounts. ➢ Micronutrients: • Required in relatively small quantities
The Essential elements OXygen Carbon Hydrogen Nitrogen Potassium Calcium Phosphorus Magnesium Sulfur Silicon Chlorine Molybdenum Iron Manganese Copper Boron Zinc Sodium Nickel
The Essential Elements Oxygen Carbon Hydrogen Nitrogen Potassium Calcium Phosphorus Magnesium Sulfur Silicon Chlorine Molybdenum Iron Manganese Copper Boron Zinc Sodium Nickel
Macroelements From the soil From H2o and co2 Nitrogen OXygen Phosphorus Carbon Potassium Hydrogen Calcium Magnesium Sulfur SIlicon
Macroelements ➢ From H2O and CO2 • Oxygen • Carbon • Hydrogen ➢ From the soil: • Nitrogen • Phosphorus • Potassium • Calcium • Magnesium • Sulfur • Silicon
Microelements Chlorine ·|ron Manganese(Mn) · Boron Molybdenum Zinc Copper Nickel Sodium
Microelements • Chlorine • Iron • Manganese（Mn） • Boron • Molybdenum • Zinc • Copper • Nickel • Sodium
Function of Essential Elements Structure of important compounds: amino acids, protein, nuclear acids, etc Enzyme-activating Contributing to osmotic potentials Energy metabolism: ATP, ADP, AMP All of the above
Function of Essential Elements ➢ Structure of important compounds: amino acids, protein, nuclear acids, etc. ➢ Enzyme-activating ➢ Contributing to osmotic potentials ➢ Energy metabolism: ATP, ADP, AMP ➢ All of the above
Usually most deficient elements in soils Nitrogen Phosphorus Potassium
Usually most deficient elements in soils ➢ Nitrogen ➢ Phosphorus ➢ Potassium