pasture rejuvenation - saskatchewan forage · 2016-11-16 · august 2015 . why and when to...
TRANSCRIPT
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Pasture Rejuvenation
August 2015
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Why and When to Rejuvenate
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Identify the source
Grazing management
(time, length, frequency)
Removal of nutrients and no inputs
(example: hay field)
Unfavorable weather
(drought, flood, frost)
Soil related issues
(salinity, compaction, texture)
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Inventory / Monitoring
• Take a pasture inventory
• Match forage demand and supply
• Sustainable grazing management plan
• Repeat inventory (monitoring)
• Observe trend
• Adjust grazing management plan
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Your Options
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Evaluate Existing
Vegetation
Desirable Vegetation Dominates
Manage
Provide Rest
Change Harvest Timing
Change Species of Livestock
Manipulate
Fertilization
Herbicide Treatment
Burning
Enhance
Sod-Seeding
Over-Seeding
Undesirable Vegetation Dominates
Replace
Conventional Seeding
Sod-Seeding
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Manage
• Provide effective rest During growing season
• May be the most economical solution
• Considerations Alternate feed source
Fencing
Water
Changes to management plan
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Manipulate
• Fertilization
• Herbicide Treatment
• Burning
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Adding nutrients
• Commercial Fertilizer Grasses generally need N + P
Legumes generally need P + S
• Considerations Soil test!
Quick way to increase yield – one year response
Success is extremely moisture dependent
Pencil economics
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Average N Response
• Brown soil zone 10-15lbs
• Dark Brown soil zone 15-25lbs
• Black soil zone 20-30lbs
Grass Only
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Adding nutrients
• Natural Fertilizer (Manure)
Spreading mechanically
Spreading through animals (example: bale graze)
• Considerations
Soil test!
Site selection and rotation
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Manipulate
• Herbicide application Difficult if a legume is present
Repeated applications may be necessary
Consider residual effects
Environmental impacts (example: waterways)
• Biological control Scentless chamomile, leafy spurge,
nodding thistle
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Rotowiper ADOPT Project
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Impact of Rotowiper on Absinth
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Biocontrol in Scentless Chamomile
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Livestock in Weed Control
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Altering nutrient cycling
• Burning
• Considerations
Part of natural disturbance regime
Release nutrients in litter layer
Creates grazing animal attraction
Liability!
Be safe
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Enhance
• Sod-seeding
• Over-seeding
Suppress existing vegetation
Add a Legume
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Replace
• Most aggressive method
• Considerations
Loss of forage production for min. one year
Weather factors influence success
Poor of failed establishment possible
Most applicable when stand is poor and
desirable plants are <50% of stand
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Should I or Not?
• Economic considerations
• Pasture inventory
Your Choice
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For more information:
Contact your local Regional Forage Specialist
or the Agriculture Knowledge Centre
at 1-866-457-2377
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