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Transcript of Virtual Winter School – 2011 | January 10 th. Over the next few minutes… The increasing value of...
![Page 1: Virtual Winter School – 2011 | January 10 th. Over the next few minutes… The increasing value of forage quality Interpreting forage quality reports Busting.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649dd25503460f94ac8484/html5/thumbnails/1.jpg)
Dr. Dennis Hancock Extension Forage Specialist
Crop and Soil Sciences – UGA
Dr. Dennis Hancock Extension Forage Specialist
Crop and Soil Sciences – UGA
2010 Forage ManagementAgent Training
2010 Forage ManagementAgent Training
Virtual Winter School – 2011 | January 10th
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Over the next few minutes…Over the next few minutes…
• The increasing value of forage quality
• Interpreting forage quality reports
• Busting a few myths
• A little miscellany
• Plus, a few diversions…
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Take Time to Focus on Forage Quality
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The least used and least understood element of a good forage management plan.
The least used and least understood element of a good forage management plan.
Photo credit: Bobby Smith, Morgan CEC
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Forage Quality has High Value Now
Forage Quality has High Value Now
Crop Maturity CP TDNSupplement
† Cost‡
-- % -- -- % -- lbs/hd/day $/hd/day
Bermudagrass
4 weeks 10-12 58-62 0 $0
6 weeks 8-10 51-55 4.8 $0.45
8 weeks 6-8 45-50 7.5 $0.72
Tall Fescue Late boot 14-16 66-70 0 $0
Early head
11-13 60-63 0 $0
Dough 8-10 50-54 5.3 $0.50
† Assuming soyhulls supplementation for forage quality on low end of the range.
‡ Approximate prices for December 2010.
Supplementing a Lactating Beef Cow
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Forage Quality has High Value Now
Forage Quality has High Value Now
Crop Maturity CP TDNSupplement
† Cost‡
-- % -- -- % -- lbs/hd/day $/hd/day
Bermudagrass
4 weeks 10-12 58-62 0 $0
6 weeks 8-10 51-55 4.8 $0.45
8 weeks 6-8 45-50 7.5 $0.72
Tall Fescue Late boot 14-16 66-70 0 $0
Early head
11-13 60-63 0 $0
Dough 8-10 50-54 5.3 $0.50
† Assuming soyhulls supplementation for forage quality on low end of the range.
‡ Approximate prices for December 2010.
Supplementing a Lactating Beef Cow
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Forage Quality has High Value Now
Forage Quality has High Value Now
Crop Maturity CP TDNSupplement
† Cost‡
-- % -- -- % -- lbs/hd/day $/hd/day
Bermudagrass
4 weeks 10-12 58-62 0 $0
6 weeks 8-10 51-55 4.8 $0.45
8 weeks 6-8 45-50 7.5 $0.72
Tall Fescue Late boot 14-16 66-70 0 $0
Early head
11-13 60-63 0 $0
Dough 8-10 50-54 5.3 $0.50
† Assuming soyhulls supplementation for forage quality on low end of the range.
‡ Approximate prices for December 2010.
Supplementing a Lactating Beef Cow
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What is the difference?What is the difference?
1) Digestible energy2) How much can be eaten
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The Relationship between Fiber (NDF) and Dry Matter Intake (DMI)
The Relationship between Fiber (NDF) and Dry Matter Intake (DMI)
Fiber (NDF) Level
Inta
ke
Intake toMeet Needs
Intake is Physically Limited
Dry Matter Intake (DMI)
Dig. Energy Intake
Low Digestibility High Digestibility
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What is “high quality forage?”
What is “high quality forage?”
• Forage that is highly digestible (i.e., high TDN)
• Large amounts of the forage can be consumed (i.e., high DMI).
• Relative Forage Quality (RFQ) =
TDN * DMI/1.23
• Forage that is highly digestible (i.e., high TDN)
• Large amounts of the forage can be consumed (i.e., high DMI).
• Relative Forage Quality (RFQ) =
TDN * DMI/1.23
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Relative Forage Quality (RFQ)75 100 125 150 175 200 225
• Heifer, 18-24 mo.• Dry cow
• Mature horse, lt. work
• Heifer, 12-18 mo.• Lactating beef cow
• Lactating mare• Mature horse, mod. work
• Dairy, last 200 days• Heifer, 3-12 mo.• Stocker cattle• Weanling horse
• Mature horse, int. work
• Dairy, 1st 120 days• Dairy calf
Qu
ality
Req
uir
ed
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Typical Range in Quality of
Common Forages
Typical Range in Quality of
Common Forages
Relative Forage Quality (RFQ)
Summer Annual Grass
Bermudagrass
Cool Season Peren. Grasses
Other Legumes
Alfalfa
75 100 125 150 175 200 225
Cool Season Annual Grasses
Qu
ality
Pro
vid
ed
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There’s No Way to Know Without a Forage Test
There’s No Way to Know Without a Forage Test
Photo credit: Bobby Smith, Morgan CEC
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Common Questions about Interpreting and Using Forage
Quality Data
Common Questions about Interpreting and Using Forage
Quality Data
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Reading Forage Quality DataReading Forage Quality Data
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Reading Forage Quality DataReading Forage Quality Data
1
2
3
Price
4
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Let’s Do Some ComparisonsLet’s Do Some Comparisons
A
B
C
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Nutrient Requirements: 1200 lb cow*
Nutrient Requirements: 1200 lb cow*
Req.
TDN 58.1%
CP 9.6%
* First 3-4 mo postpartum, prep to rebreed
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Comparing One Lot of Hay To Another
Comparing One Lot of Hay To Another
Lot ID A B C
Kind of Hay Tift 85 TF/OG Coast
RFQ 96.2 109.7 118.5
CP, % 10.7 14.6 14.3
NDF, % 65.8 58.5 56.1
ADF, % 40.6 36.2 32.7
Lignin, % 7.0 6.6 4.8
TDN, % 52.8 56.9 61.2
Which lot is best for our lactating beef cow?
Req.
TDN 58.1%
CP 9.6%
* First 3-4 mo postpartum, prep to rebreed
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Comparing One Lot of Hay To Another
Comparing One Lot of Hay To Another
Lot ID A B C
Kind of Hay Tift 85 TF/OG Coast
RFQ 96.2 109.7 118.5
CP, % 10.7 14.6 14.3
NDF, % 65.8 58.5 56.1
ADF, % 40.6 36.2 32.7
Lignin, % 7.0 6.6 4.8
TDN, % 52.8 56.9 61.2
Price, $/ton 95 110 125
Which lot is best for our lactating beef cow?
Req.
TDN 58.1%
CP 9.6%
* First 3-4 mo postpartum, prep to rebreed
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Tools For Taking a Forage Sample
Tools For Taking a Forage Sample
“Penn State Probe”
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Tools For Taking a Forage Sample
Tools For Taking a Forage Sample
“Colorado Hay Probe”
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How To Take a Forage Sample
How To Take a Forage Sample• Sample from each field AND
cutting (“Lot” of hay).
• Use bale corer to get a representative sample from 20 bales per lot.
• Insert the sampler fully and cross-ways to the stems.
• Sample from each field AND cutting (“Lot” of hay).
• Use bale corer to get a representative sample from 20 bales per lot.
• Insert the sampler fully and cross-ways to the stems.
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How To Take a Forage Sample
How To Take a Forage Sample• Fill a clean quart-size plastic bag
with about ½ lb of forage.
• Label each bag with details.
• Send to an accredited lab (National Forage Testing Association), such as the UGA Feed and Environmental Water Lab.
• For details, see the FAQ page on www.georgiaforages.com
• Fill a clean quart-size plastic bag with about ½ lb of forage.
• Label each bag with details.
• Send to an accredited lab (National Forage Testing Association), such as the UGA Feed and Environmental Water Lab.
• For details, see the FAQ page on www.georgiaforages.com
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A Brief InterludeA Brief Interlude
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Some Famous Horses of the Civil War
Some Famous Horses of the Civil War
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Some Famous Horses of the Civil War
Some Famous Horses of the Civil War
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Some Famous Horses of the Civil War
Some Famous Horses of the Civil War
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Daily Ration During the Civil War:
Daily Ration During the Civil War:
1. 14 lbs (6.4 kg) hay2. 12 lbs (5.4 kg) of grain (usually oats, corn, or barley)
3. Any available pasturage (rare)
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Simple Online Dietary Assessment for Horses
Simple Online Dietary Assessment for Horses
http://nrc88.nas.edu/nrh/
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A. True
B. False
C. Mythbuste
The best stocking rate (as a rule of thumb) for horse pastures in Georgia would typically be: 1 medium-sized horse (1100-lbs) per acre.
The best stocking rate (as a rule of thumb) for horse pastures in Georgia would typically be: 1 medium-sized horse (1100-lbs) per acre.
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The best stocking rate (as a rule of thumb) for horse pastures in Georgia would typically be: 1 medium-sized horse (1100-lbs) per acre.
The best stocking rate (as a rule of thumb) for horse pastures in Georgia would typically be: 1 medium-sized horse (1100-lbs) per acre.
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Graphical Description of Diet ChoiceGraphical Description of Diet Choice
GrassLegume Browse
Flat
SteepLow
High
CATTLE
HORSE
Forage Type
Slope Preference
Sele
ctiv
ity
SHEEP
GOATS
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Approximate Diet Selection of Grazing Animals when Given
Choice
Approximate Diet Selection of Grazing Animals when Given
Choice
Type of DietAnimal Species Grasses Legumes Browse
Cattle 65-75 20-30 5-10
Horses 70-80 15-25 0-5Sheep 45-55 30-40 10-20Goats 20-30 10-30 30-50White-tailed deer 30-60 40-50 10-30
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What is the best bermudagrass variety for horse hay?
What is the best bermudagrass variety for horse hay?
A. Alicia
B. Coastal
C. Tifton 44
D. Tifton 85
E. None of the above.
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• Varieties differ in quality
• Vigor
• Coarseness & drying rate
BermudagrassBermudagrass
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Selecting the appropriate variety.
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Palatability of Bermudagrasses
Palatability of Bermudagrasses
Highly acceptable: Coastal = Tifton 44 = Tifton 78
(= Russell)
Acceptable if given no other choice: Tifton 85 Coastcross
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A. True
B. False
C. Mythbusted
True or False: Horses cannot eat bermudagrass … they’ll get impacted and die!
True or False: Horses cannot eat bermudagrass … they’ll get impacted and die!
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Impaction on BermudagrassImpaction on
Bermudagrass
• High NDF Content Somewhat related to bermudagrass
variety As a rule of thumb for bermudagrass
hay, keep NDF < 65%. • Insufficient Water Availability • Insufficient Mastication (chewing)
Fed only 1-3 times per day Horses in stall
• Inactivity/lack of exercise
Myth or Truth?Myth or Truth?
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True or False: Horses cannot eat bermudagrass … they’ll get impacted and die!
True or False: Horses cannot eat bermudagrass … they’ll get impacted and die!
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A. True
B. False
C. Mythbusted
Any grass hay can cause founder or laminitis in my horses.Any grass hay can cause founder or laminitis in my horses.
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Any grass hay can cause founder or laminitis in my horses.Any grass hay can cause founder or laminitis in my horses.
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GroupCarbohydrat
e Stored Location
Warm Season Perennial Grasses
Starch Stolons, stem base, rhizomes
Warm Season Annual Grasses
Sucrose Lower stem
Cool Season grasses (A & P)
Fructan Stem base
Legumes Starch Taproot, stolons, rhizomes
Carbohydrate Storage in Forage SpeciesCarbohydrate Storage in Forage Species
Laminitis and High Quality Hay
Laminitis and High Quality Hay
Myth or Truth?Myth or Truth?
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Tall FescueTall Fescue• Most widely used
forage grass in the U.S. High yields and
persistent.
• Endophytic fungus produces toxic alkaloids Fescue toxicosis Alkaloids aid drought
tolerance and persistence
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ADG Gain(lbs/hd/d) (lb/acre)
E+ 1.10 126NE 1.83 186E+ & WC 1.60 150NE & WC 2.61 252
Effect of Tall Fescue, Endophyte, and White Clover on Stocker Production in
the Spring
Effect of Tall Fescue, Endophyte, and White Clover on Stocker Production in
the Spring
Jesup Tall Fescue and Durana White Clover. 3-yr trial. Eatonton, GA.Hill, Andrae, and Bouton (unpublished data)
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Tall FescueTall Fescue• Most widely used
forage grass in the U.S. High yields and
persistent.
• Endophytic fungus produces toxic alkaloids Fescue toxicosis Alkaloids aid drought
tolerance and persistence
• Novel Endophyte TF gives persistence benefit w/o toxicosis problems.
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NE Tall FescueNE Tall Fescue• Novel Endophyte
Endophyte from different TF population
• UGA and AgResearch (NZ) researchers developed and tested Jesup MaxQ.
• NE TF gives persistence benefit w/o toxicosis problems.
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ADG Gain(lbs/hd/d) (lb/acre)
E+ 1.10 126NE 1.83 186E+ & WC 1.60 150NE & WC 2.61 252
Effect of Tall Fescue, Endophyte, and White Clover on Stocker Production in
the Spring
Effect of Tall Fescue, Endophyte, and White Clover on Stocker Production in
the Spring
Jesup Tall Fescue and Durana White Clover. 3-yr trial. Eatonton, GA.Hill, Andrae, and Bouton (unpublished data)
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ADG Gain(lbs/hd/d) (lb/acre)
E+ 1.10 126NE 1.83 186E+ & WC 1.60 150NE & WC 2.61 252
Effect of Tall Fescue, Endophyte, and White Clover on Stocker Production in
the Spring
Effect of Tall Fescue, Endophyte, and White Clover on Stocker Production in
the Spring
Jesup Tall Fescue and Durana White Clover. 3-yr trial. Eatonton, GA.Hill, Andrae, and Bouton (unpublished data)
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A. True
B. False
C. Mythbuste
Tall fescue should be avoided as a component in horse pastures.Tall fescue should be avoided as a component in horse pastures.
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Tall fescue should be avoided as a component in horse pastures.Tall fescue should be avoided as a component in horse pastures.
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Effect of Toxic Endophyte-Contaminated Fescue on Gestation
Length in Gravid Mares
Series1300
320
340
360
380
400
(Monroe et al, 1988 - Clemson)
E- E+
Gesta
tion
Len
gth
(d
ays)
+ 27 days
From: D.L. Cross and T. Gimenez “Fescue Toxicosis in Horses” (ppt online)
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Effect of Toxic Endophyte-Contaminated Fescue on Foals and Mares
Effect of Toxic Endophyte-Contaminated Fescue on Foals and Mares
Stillborn Foals Agalactic Mares
Retained Placentas
Mares Rebred0
1
2
3
4
5
6
7
(Monroe et al., - Clemson)
E- E+
Rep
ort
ed
In
cid
en
ces
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• Remove from TF pasture or hay 60-90 days before anticipated foaling
• Alkaloid toxins are very stable
• Very low levels of fescue (%?, Probably less than 20%) can cause severe problems
• Keep accurate records of breeding and anticipated foaling dates
Mare Mgmt. BMPsMare Mgmt. BMPs
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NE Tall FescueNE Tall Fescue
GA 186 AR584
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Texoma MaxQ II -More persistent after summer drought
Texoma MaxQ II -More persistent after summer drought
Courtesy of Dr. Joe Bouton, Noble Foundation
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SpringSpring
Courtesy of Dr. Joe Bouton, Noble Foundation
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Late SummerLate Summer
Courtesy of Dr. Joe Bouton, Noble Foundation
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AutumnAutumn
Courtesy of Dr. Joe Bouton, Noble Foundation
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Following SpringFollowing Spring
Courtesy of Dr. Joe Bouton, Noble Foundation
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Summer Dormancy Trait in Tall Fescue
Summer Dormancy Trait in Tall Fescue
Summer Winter
Courtesy of Dr. Joe Bouton, Noble Foundation
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NE Tall FescueNE Tall Fescue
A good option, but…• Expensive• Requires renovation of
entire pasture or hayfield
• Down time in pastures• Risky (weather)
Other curative options?
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Yield TrialsYield Trials
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Grazing Persistence TrialsGrazing Persistence Trials
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Grazing Persistence TrialsGrazing Persistence Trials
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“Safe” Tall Fescue“Safe” Tall Fescue• Marketed as an
alternative to MaxQ• Has performed well
in other, more northern locations.
• Has performed poorly in UGA yield trial Lowest stand rating
after 2 years. Has not been
evaluated under grazing in GA.
• Marketed as an alternative to MaxQ
• Has performed well in other, more northern locations.
• Has performed poorly in UGA yield trial Lowest stand rating
after 2 years. Has not been
evaluated under grazing in GA.
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Tifto
n 85
Coast
cros
s II*
Russe
llP2
*
Coast
cros
s I
UF-Ria
ta
TifQ
uik
Tifto
n 9
Coast
al
Pens
acol
a
Tifto
n 44
Cheye
nne
Lare
do
Wra
ngle
r0
5000
10000
15000
20000
25000
Fora
ge Y
ield
s(l
bs D
M/a
cre
)Warm Season Perennial
Grass Variety Trial – Tifton (avg. over 2006-2008)
Warm Season Perennial Grass Variety Trial – Tifton
(avg. over 2006-2008)
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UF-RiataUF-Riata
• Pensacola-type
• Less sensitive to daylength
• High yields, slightly improved digestibility
• Seed available through Ragan and Massey (www.raganandmassey.com)
• Pensacola-type
• Less sensitive to daylength
• High yields, slightly improved digestibility
• Seed available through Ragan and Massey (www.raganandmassey.com) Dr. Ann Blount, Univ. of FL
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TifQuik BahiagrassTifQuik Bahiagrass
• Faster establishment in early spring Aids competition with weeds Fits with crop rotation
• Improved grazing in est. year Vigorous seedlings
• Seed available: Shiloh Farms (shilohfarmsinc.com
)
• Faster establishment in early spring Aids competition with weeds Fits with crop rotation
• Improved grazing in est. year Vigorous seedlings
• Seed available: Shiloh Farms (shilohfarmsinc.com
)
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MiscellanyMiscellany
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New Summer Annuals that Sound Too Good to
Be True
New Summer Annuals that Sound Too Good to
Be True
Teff – warm season annual grass
Oregon
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New Summer Annuals that Sound Too Good to
Be True
New Summer Annuals that Sound Too Good to
Be True
Teff – warm season annual grass
Ohio
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New Summer Annuals that Sound Too Good to
Be True
New Summer Annuals that Sound Too Good to
Be True
Teff – warm season annual grass
Georgia
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An Opportunity for High Quality Forage
An Opportunity for High Quality Forage
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Peanut Hay QualityPeanut Hay Quality
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Peanut Hay Mineral Content
Peanut Hay Mineral Content
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Parting ThoughtsParting Thoughts
• High energy prices and a weak U.S. dollar will cause supplement (and fertilizer prices) to continue to be a major limit to profitability. We need to focus on producing
high quality forage.
• There are a large number Pay now, or pay a lot more later.
• High energy prices and a weak U.S. dollar will cause supplement (and fertilizer prices) to continue to be a major limit to profitability. We need to focus on producing
high quality forage.
• There are a large number Pay now, or pay a lot more later.
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Hay ProductionSchool 2011
March 29-30th
Georgia Farm Bureau Home Office
Macon, GA
Hay ProductionSchool 2011
March 29-30th
Georgia Farm Bureau Home Office
Macon, GA
www.georgiaforages.com
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QUESTIONS?QUESTIONS?
www.georgiaforages.com1-800-ASK-UGA1
www.georgiaforages.com1-800-ASK-UGA1