Mineral Nutrition Studied by soil-free culture in nutrient solutions:

1. Mineral Nutrition Studied by soil-free culture in nutrient solutions:

2. Mineral Nutrition • Studied by soil-free culture in nutrient solutions: Hoagland’s is best known

3. Mineral Nutrition • Soil-free culture • Sand culture: don’t really control nutrients

4. Mineral Nutrition • Soil-free culture • Sand culture: don’t really control nutrients • Hydroponics: immerse roots in nutrient solution

5. Mineral Nutrition • Soil-free culture • Sand culture: don’t really control nutrients • Hydroponics: immerse roots in nutrient solution • Rapidly deplete nutrients & O2 & alter pH

6. Mineral Nutrition • Soil-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

7. Mineral Nutrition • Soil-free culture • Sand culture • Hydroponics: immerse roots in nutrient solution • Slanted film maintains [nutrients] &O2 • Aeroponics spraysnutrient solution on roots

8. Mineral Nutrition • Macronutrients • CHOPKNS

9. Mineral Nutrition • Macronutrients • CHOPKNS • CHOPNS make biopolymers

10. Mineral Nutrition • Macronutrients • CHOPNS make biopolymers • N deficiency • mobile in plant, so shows first in old leaves

11. Mineral Nutrition • Macronutrients • CHOPNS make biopolymers • P deficiency • mobile in plant, so shows first in old leaves

12. Mineral Nutrition • Macronutrients • CHOPNS make biopolymers • S deficiency • mobile in plant, so shows first in old leaves

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

14. Mineral Nutrition • Macronutrients • CHOPKNS • Ca: signaling, middle lamella, cofactor • immobile in plant, so shows first in young leaves

15. Mineral Nutrition • Macronutrients • Ca: signaling, middle lamella, cofactor • Fe: cofactor • immobile in plant, so shows first in young leaves

16. Mineral Nutrition • Macronutrients • Ca: signaling, middle lamella, cofactor • Fe: cofactor • Mg: cofactor • mobile in plant, so shows first in old leaves

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

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

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

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

21. Mineral Nutrition • Micronutrients: 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

22. Mineral Nutrition • Micronutrients: 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

23. Mineral Nutrition • Commercial fertilizers mainly supply NPK

24. 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%)

25. Mineral Nutrition • Soil nutrients • Amounts & availability vary • PSU extension Text

26. Mineral Nutrition • Soil nutrients • Amounts & availabilityvary • Many are immobile, eg P, Fe

27. Mineral Nutrition • Soil nutrients • Amounts & availability vary • Many are immobile, eg P, Fe • Mobile nutrients come with soil H2O