GES175, Science of Soils Lecture 10 Phosphorus.

Slides:

Advertisements

Similar presentations

GES175, Science of Soils Lecture 10 Phosphorus. Phosphorus Soil-Plant Relations * Energy and reproduction * Growth and development a root growth a maturity.

Advertisements

Phosphorus Chemistry in Soils and Response to Fertilizer and Manures April Leytem USDA/ARS.

Soil Biogeochemical Cycles Carbon, Nitrogen, Phosphorus.

Click a Pool to Begin Tour

Phosphorus Cycle Phosphorus is essential to the energetics, genetics and structure of living systems. Phosphorus forms part of the ATP, RNA, DNA and phospholipid.

By: Lowell Busman, John Lamb, Gyles Randall, George Rehm, and Michael Schmitt Presented by: Julie Baur April 5, 2001.

Plant Nutrition INTRO TO SOILS CH 12. Plant Nutrition Many soil factors affect plant growth Difficult/expensive to improve However... Supply of soil nutrients.

Soil Fertility and Nutrient Bioavailability Sponsored by the DEST program China Higher Education Strategic Initiatives © The University of Adelaide.

Phosphorus and Phosphate

Phosphorus cycle Members Ámbar M. Alberto O. Ángela F.

Phosphorous and Potassium Chapter 14. The only thing special about these phosphate species is that they are the dominant ones in the typical range of.

The Path to High Brix Foundation Parameters for Biological Function Plant Sap p H acid / alkaline balance HIGHER than 6.4 probable anion shortages Nitrogen,

Class evaluations.

Dissolution and Solubility Processes Dissolution-precipitation equilibria affect many soil processes, plant growth, etc Dissolution is the disintegration.

Mineral Nutrition Plant life cycle

Nutrient Cycling Mike Hubbs USDA-NRCS

The Carbon, Nitrogen and Phosphorus Cycles

7. Phosphorus Fertilizers SOIL 5813 Soil-Plant Nutrient Cycling and Environmental Quality Department of Plant and Soil Sciences Oklahoma State University.

(commercial fertilizers)

CYCLING OF PHOSPHORUS ATOMS

Pathways of Elements in the Ecosystem: Bio-geo-chemical (Nutrient) Cycles Objectives: Elements and their uses Spatial and temporal scales of ecosystems.

PHOSPHORUS BY HEMAVATHY.

Exchange Reactions Cation exchange Acid Soils Salt/Sodium Affected Soils Lecture 5.

Nutrients Chapter 6.

Soil Phosphorus Unit: Soil Science.

Phosphorus Behavior in Soils Plant and Soil Sciences Department Oklahoma State University Plant and Soil Sciences Department Oklahoma State University.

Biogeochemical Cycles

Soil Biogeochemical Cycles Carbon, Nitrogen, Phosphorus.

Nitrogen Cycle A. Nitrogen Facts  Makes up DNA & proteins (muscle function). (muscle function).  Help plants grow. Where Nitrogen is Found (store): 

Chapter 5: The Chemistry of Life. Biogeochemical Cycles A biogeochemical cycle is the complete path a chemical takes through the four major components.

Soil Biogeochemical Cycles Carbon, Nitrogen, Phosphorus.

MICROBIAL TRANSFORMATION OF NITROGEN,PHOSPHORUS, & MANGENESE

Plant Nutrition (ch37) For a typical plant water and minerals come from the soil, while.

Micronutrient elements

Soil Chemistry.

Soil Biogeochemical Cycles

Plant Nutrition: N,P and K

Phosphorus Cycle and Summary

Phosphorus Chapter 5.

Chapter 8—Part 2 Basics of ocean structure The Inorganic Carbon Cycle/

Basic Soil-Plant Relationships

3-3 Cycles of Matter.

Phosphatfractions in litter/soil

The Biosphere Chapter 8 p

Soil Biogeochemical Cycles

Basic Soil-Plant Relationships

The Carbon, Nitrogen and Phosphorus Cycles

Please highlight all the terms in blue.

Chapter 37. Plant Nutrition.

THE PHOSPHATE CYCLE © 2016 Paul Billiet ODWS.

Water cycle Water moves between the ocean, atmosphere and land.

ZINC CYCLE Zn2+ and chelates Available at pH < 7.7 Industrial

Cellular Processes and structure

Exchange Reactions Cation exchange Acid Soils

The Carbon, Nitrogen and Phosphorus Cycles

Nutrient elements.

Cycling of matter Section 3.4. Cycling of matter Section 3.4.

The Biosphere Chapter 8 p

The Phosphorus Cycle.

Storage as Plant Products, Feeds, Mineral Supplements CROPS

Carbon Cycle Biological Significance: Carbon is the key component in all organic molecules. These are the essence of life! >Photosynthesis: 6CO2 + 6H2O.

The Nitrogen and Phosphorus Cycles

The Phosphorus Cycle Which Earth Systems Does Phosphorus Cycle Through?? How is This Different From the Cycling of Carbon??

Matter can neither be created or destroyed but change from one form to the next.

Cycling of Matter Nutrient Cycles.

The Phosphorus Cycle Which Earth Systems Does Phosphorus Cycle Through?? How is This Different From the Cycling of Carbon??

3-3 Cycles of Matter.

Nutrient Cycles: The Nitrogen Cycle

The Biosphere Chapter 8 p

PHOSPHOROUS CYCLE.

Presentation transcript:

GES175, Science of Soils Lecture 10 Phosphorus

Phosphorus Soil-Plant Relations Slide 10.2 Phosphorus Soil-Plant Relations * Energy and reproduction * Growth and development a root growth a maturity (seed set, flowering,...) * Maintained by organic matter cycling

Water Quality accelerated eutrophication Slide 10.3 Water Quality accelerated eutrophication P (often) promotes algae growth - may promote anoxia and lead to ‘dead’ zones P from point and nonpoint sources

Phosphorus Fixation * Limited Biological Availability Slide 10.4 Phosphorus Fixation * Limited Biological Availability • P reacts strongly with soil material - limits bioavailability - limits transport through soil - movement occurs via erosion • Adsorbs and precipitates

Adsorption Reactions * Strong adsorption on soil minerals Slide 10.5 Adsorption Reactions * Strong adsorption on soil minerals - adsorption on Fe- and Al-oxides - adsorption on ‘edge’ sites of silicate clays (dominantly kaolinite)

Slide 10.6 Volcanic Ash ëë

Inorganic P Compounds (precipitates) Slide 10.7 Inorganic P Compounds (precipitates) Acid soils 8 Fe and Al phosphates FePO4l2H2O, AlPO4l2H2O Alkaline soils 4 Ca and Mg phosphates

Inorganic P Compounds â Ca(H2PO4)2 decreasing solubility Slide 10.8 6 â monocalcium phosphate â CaHPO4 â dicalcium phosphate â Ca3(PO4)2 â tricalcium phosphate â 3Ca3(PO4)2lCa(OH)2 â hydroxyapatite â 3Ca3(PO4)2lCaCO3 â carbonate apatite 6 pH 8

Nomenclature H3PO4 = phosphoric acid H2PO4- = monobasic Slide 10.9 Nomenclature H3PO4 = phosphoric acid H2PO4- = monobasic HPO4-2 = dibasic PO4-3 = tribasic

Phosphate Ion: Protonation Slide 10.10 Phosphate Ion: Protonation acid soils alkaline soils

Most Available P between pH 6 - 7 Slide 10.11 Most Available P between pH 6 - 7

Organic Soil Phosphorus Slide 10.12 Organic Soil Phosphorus * 20 - 80 % of total soil P is organic * Mostly inositol phosphates, C6H6(OH)6 - 10 - 50 % of organic-P - some nucleic acid and phospholipids

Cycling: A slow release mechanism Slide 10.13 Cycling: A slow release mechanism Organic-P immobilization mineralization (available P) HxPO4x-3 Solid Phase-PO4 (unavailable)

Symbiotic Relation: Fungi and Plants Mycorrhizae root infections, a key to phosphorus uptake Plant root Fungal hyphae mycorrihizae

The End

Reactions at High pH Values Slide 10.11 Reactions at High pH Values * P converts to less soluble Ca and Mg compounds Ca(H2PO4)2 + CaCO3 + H2O ® 2 CaHPO4·2H2O + CO2 very less soluble soluble 6 CaHPO4·2H2O + 3 CaCO3 ® 3 Ca3(PO4)2 + 3 CO2 + 5 H2O less soluble 3 Ca3(PO4)2 + CaCO3 ® 3Ca3(PO4)2·CaCO3 very insoluble - most serious in calcareous soils of arid regions