Mineral NutritionStudied by soil-free culture in nutrient solutions:

Mineral NutritionStudied by soil-free culture in nutrient solutions: Hoagland’s is best known

Mineral NutritionSoil-free culture• Sand culture: don’t really control nutrients

Mineral NutritionSoil-free culture• Sand culture: don’t really control nutrients• Hydroponics: immerse roots in nutrient solution

Mineral NutritionSoil-free culture• Sand culture: don’t really control nutrients• Hydroponics: immerse roots in nutrient solution

• Rapidly deplete nutrients & O2 & alter pH

Mineral NutritionSoil-free culture• Sand culture: don’t really control nutrients• Hydroponics: immerse roots in nutrient solution

• Rapidly deplete nutrients & O2 & alter pH• Slanted film maintains [nutrients] & O2

Mineral NutritionSoil-free culture• Sand culture• Hydroponics: immerse roots in nutrient solution• Slanted film maintains [nutrients] & O2

• Aeroponics sprays nutrient solution on roots

Mineral NutritionMacronutrients• CHOPKNS

Mineral NutritionMacronutrients• CHOPKNS• CHOPNS make biopolymers

Mineral NutritionMacronutrients• CHOPNS make biopolymers• N deficiency • mobile in plant, so shows first in old leaves

Mineral NutritionMacronutrients• CHOPNS make biopolymers• P deficiency • mobile in plant, so shows first in old leaves

Mineral NutritionMacronutrients• CHOPNS make biopolymers• S deficiency • mobile in plant, so shows first in old leaves

Mineral NutritionMacronutrients• CHOPKNS• CHOPNS make biopolymers• K makes turgor, enzyme cofactor• mobile in plant, so shows first in old leaves

Mineral NutritionMacronutrients• CHOPKNS• Ca: signaling, middle lamella, cofactor• immobile in plant, so shows first in young leaves

Mineral NutritionMacronutrients• Ca: signaling, middle lamella, cofactor• Fe: cofactor• immobile in plant, so shows first in young leaves

Mineral NutritionMacronutrients• Ca: signaling, middle lamella, cofactor• Fe: cofactor• Mg: cofactor• mobile in plant, so shows first in old leaves

Mineral NutritionMacronutrients: CHOPKNSCaFeMg• Ca: signaling, middle lamella, cofactor• Fe: cofactor• Mg: cofactor• mobile in plant, so shows first in old leaves

Mineral NutritionMacronutrients: CHOPKNSCaFeMgBNaCl• Ca: signaling, middle lamella, cofactor• Fe: cofactor• Mg: cofactor• mobile in plant, so shows first in old leaves

Mineral NutritionMicronutrients: BNaCl• B: cell elongation. NA metabolism• immobile in plant, so shows first in young leaves

Mineral NutritionMicronutrients: BNaCl• B: cell elongation. NA metabolism• Na: PEP regeneration in C4, K substitute• mobile in plant, so shows first in old leaves

Mineral NutritionMicronutrients: BNaCl• B: cell elongation. NA metabolism• Na: PEP regenerationin C4, K substitute• Cl: water-splitting, osmotic balance• mobile in plant, so shows first in old leaves

Mineral NutritionMicronutrients: BNaCl others include Cu, Zn, Mn• B: cell elongation. NA metabolism• Na: PEP regeneration, K substitute• Cl: water-splitting, osmotic balance• Cu: cofactor• immobile in plant, so shows first in young leaves

Mineral NutritionCommercial fertilizers mainly supply NPK

Plant food• 2.6% ammoniacal nitrogen • 4.4% nitrate nitrogen• 9% phosphorus• 5% potassium• calcium (2%)• magnesium (0.5%)• sulfur (0.05%)• boron (0.02%)• chlorine (0.1%)• cobalt (0.0015%)• copper (0.05%)• iron (0.1%)• manganese (0.05%)• molybdenum (0.0009%)• nickel (0.0001%)• sodium (0.10%) • zinc (0.05%)

Mineral NutritionSoil nutrients•Amounts & availability varyPSU extension Text

Mineral NutritionSoil nutrients•Amounts & availability vary•Many are immobile, eg P, Fe

Mineral NutritionSoil nutrients• Amounts & availability vary• Many are immobile, eg P, Fe• Mobile nutrients come with soil H2O