john kempf workshop slideshow
TRANSCRIPT
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Super high energy forage
Rapidly building organic matter
The most cost effective management of plant
nutrition
John Kempf
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1. Carbohydrates
2. Proteins
4. PSM’s
3. Lipids
- soil borne pathogens
- sucking and chewing insects
- air borne pathogens
- beetles
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24 hour photo cycle
John Kempf
Sugar source Photosynthesizing leaves
Sugar sinks Shoot growth
Root growth
Fruit development
Root exudates
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How to build soil organic matter
fast
John Kempf
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The Organic Matter Paradox
John Kempf
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~ 50% of crop biomass is below the
soil surface
John Kempf
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~ many crops deplete soil organic
matter
John Kempf
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How can both be true?
John Kempf
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John Kempf
Lifetime sugar production
Root Exudate
s
Plant Biomass
Fruit
Root Biomass
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John Kempf
Root Exuda
tes
Plant Bioma
ss Fruit
Root Bioma
ss
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John Kempf
Root Exuda
tes
Plant Bioma
ss Fruit
Root Bioma
ss
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John Kempf
Root Exuda
tes Plant
Biomass
Fruit Root Bioma
ss
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John Kempf
Root Exuda
tes Plant
Biomass
Fruit Root
Biomass
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John Kempf
Root Exudate
s
Plant Bioma
ss
Fruit
Root Bioma
ss
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John Kempf
Root Exudate
s
Plant Biomass
Fruit
Root Biomass
With FULL photosynthesis
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John Kempf
Root Exuda
tes
Plant Bioma
ss
Fruit
Root Bioma
ss
With usual photosynthesis
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To build organic matter fast:
1. Peak Photosynthesis
2. Fungal digestion
John Kempf
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John Kempf
Peak Photosynthesis
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John Kempf
Fungal Digestion
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John Kempf
Full Capacity Photosynthesis Full Capacity Photosynthesis Bacterial Digestion Bacterial Digestion
Mineralization Mineralization
Humification Humification
Microbial Metabolite Nutrition Microbial Metabolite Nutrition Fungal Digestion Fungal Digestion
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1. Carbohydrates
2. Proteins
4. PSM’s
3. Lipids
- soil borne pathogens
- sucking and chewing insects
- air borne pathogens
- beetles
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Maximum
photosynthesis
John Kempf
low mineral content =
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Two reasons why organic
materials are not converted to
organic matter.
John Kempf
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Lack of biological digestion
John Kempf
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John Kempf
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John Kempf
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2. Biological digestion that
doesn't lead to the formation of
stable humic substances
John Kempf
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John Kempf
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Bacterial Digestion
John Kempf
(Mineralization)
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John Kempf
Crop Fertilizer
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Amount of organic material does
not correlate to the quantity of
stable humic substances
John Kempf
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Fungal Digestion
John Kempf
(Humification)
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John Kempf
Soil Builder
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Fungal digestion in the field
John Kempf
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John Kempf
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John Kempf
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John Kempf
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John Kempf