1. Plant Response to Grazing
Range Plants -- OBJ 2: PPT
K. Launchbaugh
Plant Response to Grazing
USDA – Scott Bauer
Tim Pearce (Flickr)
Rangeland Principles (REM 151)
There are 16 slides in this presentation

2. Plants use to strategies
1) Defend yourself to AVOID being grazed
2) Be able to survive and TOLERATE grazing
Avoid
Tolerate
NPS.Gov

3. Avoid – Thorns, Spines & Awns
Slow down intake
Cause pain

4. Avoid – Toxins and Anti-Quality
Kill animal
Make animal sick
Cause pain
Jennifer Peterson
Sheri Hagwood - BLM
K. Launchbuagh
NPS.gov

5. Tolerate Defoliation Ability to tolerate depends on:
Location of Growth Points
Resources for recovery
Carbohydrates (energy for growth)

6. Location of Growing Points
Meristem
Meristem
Keep meristems out of reach…
Meristem is the tissue that is actively dividing cells. Some are added to the roots but most of them are added to the region of elongation.
Meristems = growth points for new leaves and stems

7. Location of Growing Points
Location depends
on the season
Early in the growing season: close to the ground and protected.
As the season progresses: elevates and subject to removal.
For grasses, when you’re applying a management practice, you must be aware of the morphology of the plants in the community being treated. Grasses with growing points at the base are more resistant to fire and grazing.

8. Location of Growing Points
Growing point present…growth continues
If removed…growth stops and new growth initiates from buds
Plant response depends on location of growing points.

9. Resources for Recovers
SPRING better than FALL
MOIST better than DRY

10. Carbohydrates (Energy) for Regrowth Growing Season
Leaves photosynthesize and create energy
Some energy stored in roots
Jen Peterson

11. Carbohydrates (Energy) for Regrowth Dormant Season
Jen Peterson
Univ .of Nevada Coop. Ext.

12. Plant Response to Grazing
Range Plants -- OBJ 2: PPT
K. Launchbaugh
Plant Response to Grazing
USDA – Scott Bauer
Tim Pearce (Flickr)
Rangeland Principles (REM 151)
There are 16 slides in this presentation