a new northern pds: supplements, nutritional methane and...
TRANSCRIPT
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A new northern PDS:Nitrate Supplements, Nutritional Wisdom, Methane and Remote
Technologies
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Webinar contents:
1. Basics of Non‐Protein Nitrogen (NPN) Supplementation
2. Nutritional Wisdom
3. Methane from Livestock ‐ basics
4. PDS trial
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Proudly Supported by:
Bionutric PTY LTD
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Non‐protein Nitrogen Supplementation
1. Nitrate introduction2. Protein fundamentals3. Digestion of Urea and Nitrate4. Urea or Nitrate as a NPN source5. Urea or nitrate supplementation?
Prof. John NolanAnimal Nutrition
UNE
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Poll Question #1
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Introducing Nitrate supplementation
• An alternative source of NPN compared to urea• A N source for growth of rumen microbes• Typically causes a 10‐20% reduction in methane • A UNE feedlot study showed a 3% better feed conversion efficiency with nitrate rather than urea
Practical application will more likely be for ruminants on dry, low‐protein roughages (dry periods when NPN supplements are widely used)
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Feed Protein
Rumen
Feed/bypass protein
Microbial protein
Ammonia
True protein
Non‐Protein Nitrogen
Urea orNitrate
Protein for animal growth
microbes
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Urea and Nitrate in the Rumen
• Rumen microbes degrade urea supplements to carbon dioxide and ammonia
• Microbes degrade nitrate to nitrite and then ammonia
• Both provide ammonia to support microbial growth and protein production in the rumen
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Nitrate reduces methane emissions
• Hydrogen is normally produced in the rumen and is converted to methane (CH4) and belched out
• When nitrate is present, H2 is used by microbes in the following reaction – Nitrate (NO3) Nitrite* Ammonia (NH3)
• So, there is less H2 available for methane production– * nitrite is the salt that causes toxicity
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Urea or Nitrate as NPN Supplements
• An alternative source of NPN to urea• Most graziers have experience with urea supplements
• Excessive intakes risk toxicity but minimize risks by careful management – and benefits outweigh the risks
• Nitrate carries similar risks to urea, but is also an excellent NPN supplement and has antidote
• In addition, nitrate reduces methane emissions in both sheep and cattle.
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Poll Question #2
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Urea or Nitrate Supplementation?
• Research is still required but nitrate benefits look promising• As NPN supplements, nitrate and urea give similar production
outcomes – In addition, nitrate reduces methane emissions; – however, currently nitrate (Bolifor) costs more than urea
• Unlikely that current government policy will adequately reward graziers financially for reducing greenhouse gas emissions.
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Nutritional Wisdom
1. The conundrum • What supplementation strategy
2. Euphagia• Is Nutritional Wisdom the answer?
3. Examples of Nutritional Wisdom4. Free choice
• A novel approach to Supplementation
Prof. Ron LengManaging DirectorBionutric PTY LTDRumen nutritionist
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Poll Question #3
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Ruminants have to have the capacity to use a wide range of forages with changing content of minerals
and crude protein
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The Conundrum
• It is difficult to predict mineral &/or urea requirements of cattle grazing dried of pasture because of:
– Variability in climate & its effect on stage of pasture growth;
– Extent of leaching on crude protein and mineral composition
How then to decide on the supplementation strategy?
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Deficiencies creates metabolic discomfort
• Ruminants have evolved to survive periods of nutrient deficiencies
• They have well developed abilities to test materials that removes the metabolic discomfort and correct the deficiencies syndrome
• Individual sources of urea, or sulphur, or phosphorus, or trace minerals[?] will be selected as these become deficient in available feed
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Examples of Nutritional Wisdom
• Research has shown that animals self medicate (selectively seek out materials that supply the deficient nutrient or prevent the harmful effects of toxins in their feed) for example:– When fed diets deficient in P, S or crude protein– Detoxify feeds by consuming clay minerals that bind toxins– Select higher protein diets when pregnant or lactating or
infected with worms– Sheep infected v uninfected with intestinal parasites consume
higher intake of a block medicated with anthelminthics• Self medication is a result of the animals suffering metabolic
distress (metabolic discomfort) that causes them to seek out feed resources that removes the stress
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All species display Nutritional Wisdom via metabolic stress
A group of green wing and scarlet macaws congregate on a clay lick by a river in the jungles of the Amazon.
Macaws feed on a fruit that contain toxic compounds but immediately fly to the clay licks and consume the clay which binds the toxic compound. The clay is voided in the faeces preventing absorption of the toxin.
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P deficient ruminants use trial and error to solve metabolic stress
Wild animalsalso showmetabolic discomfort
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Free Choice Supplementation
• Year round availability of mineral and urea/nitrate
• Essentially 3 separate supplements are needed with a background of other minerals – High in Urea or Nitrate– High in Phosphorus – High in Sulphur
• Animals learn to balance their needs and the disappearance of blocks signals the onset of deficiency.
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Self medication program example
3 separate blocks or an aggregate block
Molasses based N block
Salt based mineral block P and S
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Urea or Nitrate supplementation?
?
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Livestock Methane (CH4)
Prof. Roger HegartyProfessor of Animal Nutrition UNE
1. What it means to the animal2. Does it really matter?3. a) Reducing emissionsb)Improved efficiency of the animal
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1. Methane – And the Animal
Methane is a cow’s way of disposing of hydrogen exhaust
Fuel Motor ExhaustWORK
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1. Methane – And the Animal
Methane is a cow’s way of disposing of hydrogen (H2) exhaust
Fuel Motor ExhaustWORK
Feed RUMEN
WORK
CH4
H2
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1. Methane – And the Animal
Methane is a cow’s way of disposing of hydrogen (H2) exhaust
Fuel Motor ExhaustWORK
Feed RUMEN
WORK
CH4
H2
Methane is an inefficiency in converting feed to product…. But better to run inefficiently than not at all.
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Methane is also lost opportunity
• We can make a better motor….can we make a better cow ?
• 26Million cattle @ 208g methane/d in 2011≈ 2MT CH4 /year≈ energy in 6MT of grass≈ If feed is 50% digestible this means 12MT of grass eaten for no energy gain to the animal
≈ Half of cattle emissions are from Qld & NT
……appeals to self interest
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2. Methane – Does it really matter?
For you and the world
Population
Energy
Climate
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2. Methane – Does it really matter?
For you and the world
Population1 billion in Asia1 billion in Africa70% ↑ in livestock product demand
2005‐2050
Energy
Climate
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2. Methane – Does it really matter?
For you and the world
Population1 billion in Asia1 billion in Africa70% ↑ in livestock product demand
2005‐2050
ClimateLivestock = 14.5% of human induced GHG emissions
Energy
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2. Methane – Does it really matter?
For you and the world
Population1 billion in Asia1 billion in Africa70% ↑ in livestock product demand
2005‐2050 EnergyUse energy where it
offers highest financial return.Solar (grass)
powered cows, not coal (grain) powered
cows
ClimateLivestock = 14.5% of human induced GHG emissions
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3. Reduce emissions & raise efficiency
It is VERY hard to reduce an animal’s emissions from 200g/d to 150g/d without starvation or grain feeding –Nitrate is promising
Anything that will improve production/animal will reduce emissions/kg animal product
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3. Reduce emissions & raise efficiency
• Changing herd management delivers profit + emission intensity
“Alexandria” NAPCO
British breed cattle
1.25 t CH4/t LW weaned
Tropically adapted cattle
0.86 t CH4/t LW weaned
‐ a 31% improvement ‐
1980 2005
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Conclusions
• Methane production is normal and advantageous.• But…. Diverting today’s methane energy into tomorrow’s growth would be better.
• Reducing methane as an inefficiency in livestock systems will become more important as food demand and climate policy & impacts change price signals.
• We can do great things to reduce methane/kg beef sold by making every animal more productive
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Poll Question #4
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AOTG PDS Trial
1. What is the AOTG PDS trial2. PDS Aims & Activities3. Trial Design4. Remote equipment5. What are we doing6. What the future holds
Joe MillerAOTG Project OfficerAnimal Nutrition UNE
Charters TowersMob: 0477374424
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Poll Question #5
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What is Action on the Ground PDS?
• Station‐based trial testing the effects of Urea, Nitrate and free choice mineral supplement systems (namely NPN, Phosphorus & Sulphur) on productivity and emissions
• A producer demonstration trial demonstrating the use of remote pastoral management technologies
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PDS Aims and Activities
Aims:• Demonstrate safe replacement of Urea with Nitrate• Demonstrate the resultant production on Free choice supplementation programs
• Quantify variation in individual animal grazing, supplement and watering behavior and the relationships with individual performance
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Remote equipment
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Remote equipment
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Remote equipment
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Tracking performance behaviours
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Tracking performance behaviours
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Tracking performance behaviours
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High and Low Performers
• What makes a “good doer” (excluding genetics)?• What behaviors and nutrition make a:
»High performing animal&/or
»Low performing animal
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Poll Question #6
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What the Future holds…
• Individual performance – Production and reproduction• Individual behaviors – Supplement, Grazing, Watering• Individual Supplement use and subsequent performance• Individual supplement use and response to environment• Individual physiological responses• Performance of different supplements• Performance of animals given free choice Supp.• Remote mgmt. of animals using precision equipment.• Individual methane measurements in grazing environment
• And the list goes on……. Precision Supplementation
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Thanks for joining and your support:
Bionutric PTY LTD
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Thank you and Questions
Joe MillerProject Officer
Animal Nutrition UNECharters Towers
Prof. Roger HegartyProfessor of Animal
Nutrition UNE
Prof. John NolanAnimal Nutrition
UNE
Dr Ron LengEmeritus Prof. UNECEO Bionutric PTY
LTD
Please direct all post webinar questions to Joe Miller via email on: [email protected] or
Phone: 0477 374 424